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GT Research Group

School of Energy and Chemical Engineering / UNIST

professor

Prof. Guntae Kim

School of Energy and Chemical Engineering, UNIST

E-mail: gtkim@unist.ac.kr

 

Professional Experience

2018 – Present : Professor, Interdisciplinary School of Green Energy, UNIST
2016 – 2017 : Center For Energy Research, University of California San Diego, CA, Visiting Scholar
2009 – 2018 : Associate Professor, Interdisciplinary School of Green Energy, UNIST
2007 – 2009 : Postdoctoral fellow, Department of chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA
2005 – 2007 : Postdoctoral fellow, Department of Chemistry, University of Houston, HOUSTON, TX

Education

Ph.D. Department of Chemistry (2001 – 2005) : University of Houston, Houston, Tx
M.S. Industrial Chemistry (1998-2000) : Kyungpook National University, Republic of Korea
B.S. Industrial Chemistry(1991 – 1995) : Kyungpook National University, Republic of Korea

Honors

Robert A. Welch Research Foundation Fellowship (2002 – 2005)
Texas Public Education Grant-International (2002-2003)
Industrial technology award of the month (2015)
Most outstanding 100 achievements among national R & D (2015)
Outstanding achievement in academic research support project (2015)
Outstanding professor in UNIST (2019)

 

Paper

Paper

2022

144. Arim Seong, Donghwi Jeong, Minseo Kim, Sihyuk Choi**, and Guntae Kim*

“Performance comparison of composite cathode: Mixed ionic and electronic conductor and triple ionic and electronic conductor with BaZr0.1Ce0.7Y0.1Yb0.1O3-δ for highly efficient protonic ceramic fuel cells”
Journal of Power Sources, 530, 231241 (2022)
DOI : https://doi.org/10.1016/j.jpowsour.2022.231241

143. Hyunmin Kim†, Chaesung Lim†, Ohhun Kwon, Sihyuk Choi*, Jeong Woo Han*, and Guntae Kim*

“Utilization of Iso-Valent Doping Strategy in Cobalt-Free Ferrites for Highly Active and Stable Solid Oxide Fuel Cell Cathodes”
ACS Appl. Energy Mater. Just accepted (2022).

142. Yunfeng Tian, Nalluri Abhishek, Caichen Yang, Rui Yang, Sihyuk Choi, Bo Chi*, Jian Pu, Yihan Ling*, John T.S. Irvine, and Guntae Kim*

“Progress and potential for symmetrical solid oxide electrolysis cells”
Matter, 5, 2, 482-514 (2022)
DOI : https://doi.org/10.1016/j.matt.2021.11.013

2021

142. Lili Li, Jing Zhou, Zhiwei Hu, Sihyuk Choi, Guntae Kim, Jian-Qiang Wang*, and Linjuan Zhang*

“First-Principles Insight into the Effects of Intrinsic Oxygen Defects on Proton Conduction in Ruddlesden–Popper Oxides”
J. Phys. Chem. Lett., 12, 47, 11503–11510 (2021)
DOI : https://doi.org/10.1021/acs.jpclett.1c02749

141. Hyoi Jo ,† Yejin Yang ,† Arim Seong , Donghwi Jeong , Jeongwon Kim , Se Hun Joo , yujin Kim , Linjuan Zhang , Ze Liu , Jian-Qiang Wang , Sang Kyu Kwak, and Guntae Kim*

“Promotion of oxygen evolution reaction via the reconstructed active phase of perovskite oxide”
J. Mater. Chem. A, (2021)
DOI : 10.1039/D1TA08445C 

140. Seona Kim,  Guntae Kim*, and Arumugam Manthiram*

“Dysprosium doping effects on perovskite oxides for air and fuel electrodes of solid oxide cells”
Journal of Power Sources, 497, 229873 (2021)
DOI : https://doi.org/10.1016/j.jpowsour.2021.229873

139. Hyunmin Kim,† Chaesung Lim,† Ohhun Kwon,† Jinkyung Oh, Matthew T. Curnan, Hu Young Jeong, Sihyuk Choi,*  Jeong Woo Han,* and Guntae Kim*

“Unveiling the key factor for the phase reconstruction and exsolved metallic particle distribution in perovskites”
Nature Communications, 12, 6814 (2021)
DOI : https://doi.org/10.1038/s41467-021-26739-1

 

138. Yufei Song, Jiapeng Liu, Yuhao Wang, Daqin Guan, Arim Seong,  Mingzhuang Liang, Matthew J Robson, Xiandong Xiong, Zhiqi Zhang, Guntae Kim, Zongping Shao*, and Francesco Ciucci*

“Nanocomposites: A New Opportunity for Developing Highly Active and Durable Bifunctional Air Electrodes for Reversible Protonic Ceramic Cells”
Advanced Energy Materials, 2101899 (2021), Online published
DOI : 10.1002/aenm.202101899

 

137. Sangwook Joo,† Kyeonghak Kim,† Ohhun Kwon, Jinkyung Oh, Hyung Jun Kim, Linjuan Zhang, Jing Zhou, Jian-Qiang Wang, Hu Yeong Jung, Jeong Woo Han*, and Guntae Kim*

“Enhancing Thermocatalytic Activities via Up-shift of the d-Band Center of Exsolved Co-Ni-Fe Ternary Alloy Nanoparticles for Dry Reforming of Methane”
Angew. Chem. Int., 133, 16048-16055 (2021)
DOI : https://doi.org/10.1002/ange.202101335

 

136. Sangwook Joo,† Chaehyun Lim,† Ohhun Kwon, Linjuan Zhang, Jing Zhou, Jian-Qiang Wang, Hu Yeong Jung, Yong-wook Sin, Sihyuk Choi*, and Guntae Kim*

“The first observation of Ni nanoparticle exsolution from YSZ and its application for dry reforming of methane”
Materials reports:Energy, 1, 2666-9358 (2021)
DOI : https://doi.org/10.1016/j.matre.2021.100021

 

135. Yejin Yang,†  Jeongwon Kim,† Hyoi Jo, Arim Seong, Minzae Lee, Hyung-Ki Min, Myung-gi Seo, Youngheon Choi, and Guntae Kim*

“A rigorous electrochemical ammonia electrolysis protocol with in-operando quantitative analysis”
J. Mater. Chem. A, (2021), inside front cover selected
DOI: 10.1039/D1TA00363A

 

134. Arim Seong,†  Junyoung Kim,† Donghwi Jeong, Sivaprakash Sengodan, Meilin Liu, Sihyuk Choi*, and Guntae Kim*

“Electrokinetic proton transport in triple (H+/O2-/e-) conducting oxides as a key descriptor for highly efficient protonic ceramic fuel cells”
Adv. Sci., 2004099 (2021), inside back cover selected 
DOI : https://doi.org/10.1002/advs.202004099

 

133. Jun Hyuk Kim,  Seonyoung Yoo, Ryan Murphy, Yu Chen, Yong Ding, Kai Pei, Bote Zhao, Guntae Kim*, YongMan Choi*, and Meilin Liu*

“Promotion of oxygen reduction reaction on a double perovskite electrode by a water-induced surface modification”
Energy Environ. Sci.,  14, 1506-1516 (2021)
DOI :  10.1039/D0EE03283B

 

 

132. Seona Kim,  Guntae Kim*, and Arumugam Manthiram*

“A Bifunctional Hybrid Electrocatalyst for Oxygen Reduction and Oxygen Evolution Reactions: Nano-Co3O4-Deposited La0.5Sr0.5MnO3 via Infiltration”
 Molecules, 26(2), 277 (2021)
DOI : https://doi.org/10.3390/molecules26020277

 

131. Jeongwon Kim, Arim Seong, Yejin Yang, Sangwook Joo, Changmin Kim, Dong Hyup Jeon,* Liming Dai,*  and Guntae Kim*

“Indirect surpassing CO2 utilization in membrane-free CO2 Battery”
Nano Energy, 82, 105741 (2021)
DOI : 10.1016/j.nanoen.2020.105741

 

130. Kyeounghak Kim, Sangwook Joo, Rui Huang, Hyung Jun Kim, Guntae Kim*, Jeong Woo Han*

“Mechanistic insights into the phase transition and metal ex-solution phenomena of Pr0.5Ba0.5Mn0.85Co0.15O3-d from simple to layered perovskite under reducing conditions and enhanced catalytic activity”
Energy Environ. Sci., 14, 873-882 (2021)
DOI: 10.1039/D0EE02875D

 

2020

129. Hyunmin Kim,† Sangwook Joo,† Ohhun Kwon, Sihyuk Choi,*  and Guntae Kim*

“Cobalt-free Pr0.5Ba0.4Sr0.1FeO3-δ as a highly efficient cathode for commercial YSZ-supported solid oxide fuel cell”
ChemElectroChem, 7, 4378-4382 (2020)
DOI : 10.1002/celc.202001240

 

128. Ohhun Kwon, Yong In Kim, Kyeonghak Kim, Jong Chan Kim, Jong Hoon Lee, Sung Soo Park, Jeong woo Han,* Young-Min Kim,*  Guntae Kim,* and Hu Young Jeong*

“Probing One-Dimensional Oxygen Vacancy Channels Driven by Cation-Anion Double Ordering in Perovskites”
Nano Letters, 20, 8353-8359 (2020)
DOI : https://doi.org/10.1021/acs.nanolett.0c03516

 

127. Chaehyun Lim, Yejin Yang, Yong-wook Sin,* Sihyuk Choi,*  and Guntae Kim*

“Ca- and Ni-Doped Pr0.5Ba0.5FeO3-d as a Highly Active and Robust Cathode for High-Temperature Solid Oxide Fuel Cell”
Energy & Fuels, 34, 11458-11463 (2020)
DOI: 10.1021/acs.energyfuels.0c02241

 

126. Sanghyeon Park, Changmin Kim, Sung O. Park, Nam Khen Oh, Ungsoo Kim, Junghyun Lee, Jihyung Seo, Yejin Yang, Hyeong Yong Lim, Sang Kyu Kwak,* Guntae Kim,* and Hyesung Park*

“Phase Engineering of Transition Metal Dichalcogenides with Unprecedentedly High Phase Purity, Stability, and Scalability via Molten-Metal-Assisted Intercalation”
Advanced Materials, 2001889 (2020)
DOI: 10.1002/adma.202001889

 

125. Yejin Yang,† Jeongwon Kim,† Changmin Kim, Arim Seong, Ohhun Kwon, Jeong Hyeon Lee, Imanuel Kristanto, Linjuan Zhang, Jing Zhou, Jian-Qiang Wang, Jong-Beom Baek*, Sang Kyu Kwak*, and Guntae Kim*

“Edge-selective decoration with ruthenium at graphitic nanoplatelets for efficient hydrogen production at universal pH”
Nano Energy, 76, 105114 (2020)
DOI: 10.1016/j.nanoen.2020.105114

 

124. Sangwook Joo,† Arim Seong,† Ohhun Kwon, Kyeounghak Kim, Jong Hoon Lee, Raymond J. Gorte, John M. Vohs*, Jeong Woo Han*, and Guntae Kim*

“Highly Active Dry Methane Reforming Catalysts with Boosted in-situ grown Ni-Fe Nanoparticles on Perovskite via Atomic Layer Deposition”
Sci. Adv, 6, eabb1573 (2020)
DOI: 10.1126/sciadv.abb1573

 

123. Jeongwon Kim, Yejin Yang, Arim Seong, Hyuk-Jun Noh, Changmin Kim, Sangwook Joo, Ara Cho, Linjuan Zhang, Jing Zhou, Jian-Qiang Wang, Jeong Woo Han, Javeed Mahmood*, Jong-Beom Baek*, and Guntae Kim*

“Identifying the electrocatalytic active sites of a Ru-based catalyst with high Faraday efficiency in CO2- saturated media for an aqueous Zn–CO2 system”
J. Mater. Chem. A, 8, 14927-14934 (2020)
DOI: 10.1039/d0ta03050c

 

122. Ohhun Kwon,† Sangwook Joo,† Sihyuk Choi, Sivaprakash Sengodan, and Guntae Kim*

“Review on exsolution and its driving forces in perovskites”
J. Phys. Energy 2, 032001 (2020)
DOI: 10.1088/2515-7655/ab8c1f

 

121. Sangwook Joo,† Ohhun Kwon,† Seona Kim, Hu Young Jeong,  and Guntae Kim*

“Ni-Fe Bimetallic Nanocatalysts Produced by Topotactic Exsolution in Fe deposited PrBaMn1.7Ni0.3O5+δ for Dry Reforming of Methane”
Journal of The Electrochemical Society. 167, 064518 (2020)
DOI:https://iopscience.iop.org/article/10.1149/1945-7111/ab8390

 

120. Arunchander Asokan,† Chaehyun Lim,† Jeongwon Kim,† Ohhun Kwon, Hansol Lee, Sangwook Joo,  Hu Young Jeong,  and Guntae Kim*
“Carbon nanofibers encapsulated nickel-molybdenum nanoparticles as hydrogen evolution catalysts for aqueous Zn-CO2 system”
ChemNanoMat. 6, 937-946 (2020)
DOI:10.1002/cnma.202000099

 

119. Hansol Lee,† Ohhun Gwon,† Keunsu Choi, Linjuan Zhang, Jing Zhou, Jungmin Park, Jung-Woo Yoo, Jian-Qiang Wang,* Jun Hee Lee,* and Guntae Kim*
“Enhancing Bifunctional Electrocatalytic Activities via Metal d-Band-Center-Lift Induced by Oxygen Vacancy at Sub-surface of Perovskites”
ACS Catal. 10, 4664−4670 (2020)
DOI:10.1021/acscatal.0c01104

 

118. Arim Seong,† Jeongwon Kim,† Ohhun Kwon, Hu Young Jeong, Raymond J. Gorte,* John M. Vohs,* and Guntae Kim*
“Self-reconstructed Interlayer derived by in-situ Mn diffusion from La0.5Sr0.5MnO3 via atomic layer deposition for an efficient bi-functional electrocatalyst”
Nano Energy. 71, 104564 (2020)
DOI:10.1016/j.nanoen.2020.104564

 

117. Yunfei Bu,† Sangwook Joo,† Yanxiang Zhang,† Yifan Wang, Dandan Meng, Xinlei Ge*, and Guntae Kim*

“A highly efficient composite cathode for proton-conducting solid oxide fuel cells”
Journal of Power Sources. 451, 227812 (2020)
DOI:10.1016/j.jpowsour.2020.227812

 

2019

116. Seungtae Lee, Seona Kim, Sihyuk Choi,* Jeeyoung Shin,* and Guntae Kim*
“A Nano-Structured SOFC Composite Cathode Prepared via Infiltration of La0.5Ba0.25Sr0.25Co0.8Fe0.2O3-δ into La0.9Sr0.1Ga0.8Mg0.2O3-δ for Extended Triple-Phase Boundary Area”
Journal of the Electrochemical Society. 166, F805-F809 (2019) 
DOI: 10.1149/2.0851912jes

 

115. Donggue Lee,† Hansol Lee,† Ohhun Gwon, Ohhun Kwon, Hu Young Jeong, Guntae Kim,* and Sang-Young Lee*
“Monolithic Heteronanomat Paper Air Cathodes Toward Origami-Foldable/Rechargeable Zn–Air Batteries”
J. Mater. Chem. A. 7, 24231 (2019)
DOI: 10.1039/C9TA07681F

 

114. Hansol Lee, Timothy Alexander Listyawan, Nokeun Park,* Guntae Kim,* and Ikwhang Chang*
“Effect of Zn addition on electrochemical performance of Al-air battery”
International Journal of Precision Engineering and Manufacturing-Green Technology  (2019)
DOI: 10.1007/s40684-019-00136-y

 

113. Junhyun Lee,† Changmin Kim,† KeunSu Choi,† Jihyung Seo, Yunseung Choi, Wooseon Choi, Young-Min Kim, Hu Young Jeong, Jun Hee Lee*, Guntae Kim*, and Hyesung Park*
“In-Situ Coalesced Vacancies on MoSe2 Mimicking Noble Metal: Unprecedented Tafel Reaction in Hydrogen Evolution”
Nano Energy 63, 103846, (2019)
DOI: 10.1016/j.nanoen.2019.06.042

 

112. Hansol Lee, Ohhun Gwon, Chaehyun Lim, Jeongwon Kim, Oyunbileg Galindev* and Guntae Kim*
“Advanced electrochemical properties of PrBa0.5Sr0.5Co1.9Ni0.1O5+d as a bifunctional catalyst for rechargeable zinc-air batteries”
ChemElectroChem 6, 3154-3159 (2019)
DOI: 10.1002/celc.201900633

 

111. Changmin Kim,† Jeongwon Kim,† Sangwook Joo,  Yejin Yang, Jeeyoung Shin, Meilin Liu, Jaephil Cho,* and Guntae Kim*
“Highly Efficient CO2 Utilization via Aqueous Zinc– or Aluminum–CO2 Systems for Hydrogen Gas Evolution and Electricity Production”
Angew. Chem. Int. Ed 58, 9506-9511 (2019)
DOI: 10.1002/anie.201904763

110. Jeongwon Kim, Ohhun Gwon, Ohhun Kwon, Javeed Mahmood, Changmin Kim, Yejin Yang, Hansol Lee, Jong Hoon Lee, Hu Young Jeong, Jong-Beom Baek,* and Guntae Kim*
“Synergistic Coupling Derived Cobalt Oxide with Nitrogenated Holey Two-Dimensional Matrix as an Efficient Bifunctional Catalyst for Metal-Air Batteries”
ACS Nano 13, 5502-5512 (2019)
DOI: 10.1021/acsnano.9b00320

 

109. J. Kim, S. Sengodan, S. Kim, O. Kwon, Y. Bu, Guntae Kim*
“Proton conducting oxides: A review of materials and applications for renewable energy conversion and storage”
Renewable and Sustainable Energy Reviews. 109 , 606-618 (2019)
DOI: doi.org/10.1016/j.rser.2019.04.042

 

108. Nam Khen Oh,† Changmin Kim,† Jungyun Lee, Ohhun Kwon, Yunseong Choi, Gwan Yeong Jung, Hyeong Yong Lim, Sang Kyu Kwak,* Guntae Kim,* and Hyesung Park*
“In-situ local phase-transitioned MoSe2 in La0.5Sr0.5CoO3-d heterostructure and stable overall water electrolysis over 1000 hours”
Nature Communications 10 , 1723 (2019)
DOI: 10.1038/s41467-019-09339-y

 

107. Yunfei bu,† Seona Kim,† Ohhun Kwon, Qin Zhong, and Guntae Kim*
“A Composit Catalyst Based on Perovskites for Overall Water Splitting in Alkaline Conditions”
ChemElectroChem. 6 , 1520-1524 (2019)
DOI: 10.1002/celc.201801775

 

106. Arunchander Asokan, Hansol Lee, Ohhun Gwon, Jeongwon Kim, Ohhun Kwon, and Guntae Kim*
“Insight into the effect of nickel doping on ZIF-Derived oxygen reduction reaction catalysts for zinc-air batteries”
ChemElectroChem. 6 , 1213-1224 (2019)
DOI: 10.1002/celc.201801827

 

105. Ishfaq Ahmada, Feng Li, Changmin Kim, Jeong-Min Seo, Guntae Kim, Javeed Mahmood*, Hu YoungJeong*, Jong-BeomBaek*
“Robust fused aromatic pyrazine-based two-dimensional network for stably cocooning iron nanoparticles as an oxygen reduction electrocatalyst”
Nano Energy. 56 , 581-587 (2019)
DOI: https://doi.org/10.1016/j.nanoen.2018.12.007

 

104. Sangwook Joo,† Ohhun Kwon,† Kyeounghak Kim, Seona Kim, Hyunmin Kim, Jeeyoung Shin, Hu Young Jeong, Sivaprakash Sengodan, Jeong Woo Han, and Guntae Kim*
“Cation-swapped homogeneous nanoparticles in perovskite oxides for high power density”
Nature Communications. 697 (2019)
DOI: https://www.nature.com/articles/s41467-019-08624-0

 

103. Chaehyun Lim, Sivaprakash Sengodan, Donghwi Jeong, Jeeyoung Shin, and Guntae Kim*
“Investigation of the Fe doping effect on the B-site of the layered perovskite PrBa0.8Ca0.2Co2O5+δ for a promising cathode material of the intermediate-temperature solid oxide fuel cells ”
International Journal of Hydrogen Energy. 44(2), 1088-1095 (2019)
DOI: https://doi.org/10.1016/j.ijhydene.2018.10.182

2018

102. Yunfei bu, Haeseong Jang, Ohhun Gwon, Su Hwan Kim, Se Hun Joo, Gyutae Nam, Seona Kim, Yong Qin, Qin Zhong, Sankyu Kwak*, Japhil Cho*and Guntae Kim*
“Synergistic interaction of perovskite oxides and N-doped graphene in versatile electrocatalyst ”
Journal of Materials Chemistry A. 5, (2018)
DOI: 10.1039/c8ta09919g

 

101. Seona Kim, Seungtae Lee, Junyoung Kim, Jeeyoung Shin,* and Guntae Kim*
“Self-Transforming Configuration Based on Atmospheric-Adaptive Materials for Solid Oxide Cells ”
Scientific Reports. 8, 17149 (2018)
DOI:10.1038/s41598-018-35659-y

 

100. Donghwi Jeong, Junyoung Kim, Ohhun Kwon, Chaehyun Lim, Sivaprakash Sengodan*, Jeeyoung Shin,* and Guntae Kim*
“Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs) ”
Applied Science. 8(11), 2217 (2018)
DOI:10.3390/app8112217

 

99. Changmin Kim,† Jeongwon Kim,† Sangwook Joo, Yunfei Bu, Meilin Liu, Jaephil Cho,* and Guntae Kim*
“Efficient CO₂ utilization via a hybrid Na-CO₂ system based on CO₂ dissolution ”
iScience. 9, 278-285 (2018)
DOI:https://doi.org/10.1016/j.isci.2018.10.027

 

98. Arim Seong,† Junyoung Kim,† Jeongwon Kim, Seona Kim, Sivaprakash Sengodan, Jeeyoung Shin, and Guntae Kim*
“Influence of Cathode Porosity on High Performance Protonic Ceramic Fuel Cells with PrBa0.5Sr0.5Co1.5Fe0.5O5+δ Cathode”
Journal of the Electrochemical Society. 165, 13 (F1098-F1102) 
DOI: 10.1149/2.0821813jes

 

97. Changmin Kim,† Seona Kim,† Ohhun Kwon, Jeongwon Kim, and Guntae Kim*
“Polypyrrole-assisted Co3O4 anchored carbon fiber as a binder-free electrode for seawater batteries”
ChemElectroChem. 5,1-6 (2018)
DOI: https://doi.org/10.1002/celc.201801219

 

96. Yunfei Bu, Gyutae Nam, Seona Kim, Keunsu Choi, Qin Zhong, Jun Hee Lee, Yong Qin, Jaephil Cho*, and Guntae Kim*
“A Tailored Bi-functional Electrocatalyst: Boosting Oxygen Reduction/Evolution Catalyst via Electron Transfer Between N-Doped Graphene and Perovskite Oxides”
Small. 1802767 (2018)
DOI:  https://doi.org/10.1002/smll.201802767

 

95. Ohhun Kwon, Kyeounghak Kim, Sangwook Joo, Hu Young Jeong, Jeeyoung Shin, Jeong Woo Han, Sivaprakash Sengodan* and Guntae Kim*
“Self-assembled alloy nanaparticles in a layered double perovskite as a fuel oxidation catalyst for solid oxide fuel cells”
Journal of Materials Chemistry A. 6, 15947 (2018)
DOI: 10.1039/C8TA05105D

 

94. Jeongwon Kim,† Changmin Kim,† In-Yup Jeon, Jong-Beom Baek, Young-Wan Ju,* and Guntae Kim*
“A New Strategy for Outstanding Performance and Durability in Acidic Fuel Cells: A Small amount Pt Anchored on Fe,N co-Doped Graphene Nanoplatets”
ChemElectroChem. 5, 2857-2862 (2018)
DOI: http://doi.org/10.1002/celc.201800674

 

93. Chaehyun Lim, Changmin Kim, Ohhun Gwon, Hu Young Jeong, Hyun-Kon Song, Young-Wan Ju, Jeeyoung Shin, and Guntae Kim*
“Nano-perovskite oxide prepared via inverse microemulsion mediated synthesis for catalyst of lithium-air batteries”
Electrochimica Acta. 275, 248-255 (2018)
DOI:https://doi.org/10.1016/j.electacta.2018.04.121 

 

92. Seona Kim, Ohhun Kwon, Changmin Kim, Ohhun Gwon, Hu Young Jeong, Ka-Hyun Kim*, Jeeyoung Shin*, and Guntae Kim*
“Strategy for Enhancing Interfacial Effect of Bifunctional Electrocatalyst: Infiltration of Cobalt Nano Oxide on Perovskite”
Adv. Mater. Interfaces. 5, 1800123 (2018)
DOI:10.1002/admi.201800123 

 

91.  Seok-Jin Kim, Javeed Mahmood, Changmin Kim, Gao-Feng Han, Seong-Wook Kim, Sun-Min Jung, Guomin Zhu, James J. De Yoreo, Guntae Kim,* and Jong-Beom Beak*
“Defect-Free Encapsulation of Fe0 in 2D Fused Organic Networks as a Durable Oxygen Reduction Electrocatalyst”
J. Am. Chem. Soc. 140, 1737-1742 (2018)
DOI:10.1021/jacs.7b10663

 

90. Javeed Mahmood,† Feng Li,† Changmin Kim,† Hyun-Jung Choi,  Ohhun Gwon, Sun-Min Jung, Jeong-Min Seo, Sung-June Cho, Young-Wan Ju,* Hu Young Jeong,* Guntae Kim,* Jong-Beom Baek*
“Fe@C2N: A Highly-Efficient Indirect-Contact Oxygen Reduction Catalyst”
Nano Energy. 44, 304-310 (2018)
DOI: 10.1016/j.nanoen.2017.11.057

 

89. Junyoung Kim,† Areum Jun,† Ohhun Gwon, Seonyoung Yoo, Meilin Liu, Jeeyoung Shin, Tak-Hyoung Lim* and Guntae Kim*
“Hybrid-solid oxide electrolysis cell: a new strategy for efficient hydrogen production”
Nano Energy. 44, 121-126 (2018)
DOI: 10.1016/j.nanoen.2017.11.074

 

2017

 

88. Ju-Myung Kim, Jeong A.Kim, Seung-Hyeok Kim, In Sung Uhm, Sung Joong Kang, Guntae Kim, Sun-Young Lee, Sun-Hwa Yeon, Sang-Young Lee*
“All-Nanomat Lithium-Ion Batteries: A New Cell Architecture Platform for Ultrahigh Energy Density and Mechanical Flexibility”
Advanced Energy Materials. 7, 1701099 (2017)
DOI: 10.1002/aenm.201701099

 

87. Yunfei Bu*†, Ohhun Gwon†, Gyutae Nam, Haeseong Jang, Seona Kim, a Qin Zhong, Jaephil Cho*, and Guntae Kim*
“A Highly Efficient and Robust Cation Ordered Perovskite Oxides as a Bi-Functional Catalyst for Rechargeable Zinc-Air Batteries ”
ACS Nano. 11, 11594-11601 (2017)
DOI: 10.1021/acsnano.7b06595 

 

86. Feng Li, Yunfei Bu, Zijian Lv, Javeed Mahmood, Gao-Feng Han, Ishfaq Ahmad, Guntae Kim,* Qin Zhong,* and Jong-Beom Baek*
“Porous Cobalt Phosphide Polyhedrons with Iron Doping as an Efficient Bifunctional Electrocatalyst”
Small. 13, 1701167 (2017)
DOI:10.1002/smll.201701167

 

85. Sivaprakash Sengodan, Young-Wan Ju, Ohhun Kwon, Areum Jun, Hu Young Jeong, Tatsumi Ishihara, Jeeyoung Shin*, and Guntae Kim*
 “Self-Decorated MnO Nanoparticles on Double Perovskite Solid Oxide Fuel Cell Anode by in Situ Exsolution”
ACS Sustainable Chem. Eng. 5, 9207-9213 (2017)
DOI:10.1021/acssuschemeng.7b02156

 

84. Ohhun Kwon, Sivaprakash Sengodan, Kyeounghak Kim, Gihyeon Kim, Hu Young Jeong, Jeeyoung Shin, Young-Wan Ju, Jeong Woo Han, and Guntae Kim*
 “Exsolution trends and co-segregation aspects of self-grown catalyst nanoparticles in perovskites”
Nature Communications. 8 , 15967 (2017)
DOI: 10.1038/ncomms15967 

 

83. JongTae Yoo, Young-Wan Ju, Ye-Ri Jang, Ohhun Gwon, Sodam Park, Ju-Myung Kim, Chang Kee Lee, Sun-Young Lee, Sun-Hwa Yeon*, Guntae Kim*, and Sang-Young Lee*
 “One-pot surface engineering of battery electrode materials with metallic SWCNT-enriched, ivy-like conductive nanonets”
J. Mater. Chem. A. 5 , 12103-12112 (2017)
DOI: http://dx.doi.org/10.1039/C6TA10675G

 

82. Seona Kim, Chanseok Kim, Jun Hee Lee, Jeeyoung Shin, Tak-Hyoung Lim*, and Guntae Kim*
 “ Tailoring Ni-based catalyst by alloying with transition metals (M = Ni, Co, Cu, and Fe) for direct hydrocarbon utilization of energy conversion devices”
Electrochimica Acta. 225 , 399-406 (2017)
DOI: http://dx.doi.org/doi:10.1016/j.electacta.2016.12.178

 

81. Dong-Gyu Lee, Su Hwan Kim, Se Hun Joo, Ho-Il Ji, Hadi Tavassol, Yuju Jeon, Sihyuk Choi, Myeong-Hee Lee, Chanseok Kim, Sang Kyu Kwak, Guntae Kim and Hyun-Kon Song*
 ” Polypyrrole-assistant Oxygen Electrocatalysis on Perovskite Oxides ”
Energy Environ. Sci. 10, 523-527(2017)
DOI: 10.1039/C6EE03501A

 

80. Hackho Kim, Shintaro Ida, Young-Wan Ju, Junko Mastsuda, Guntae Kim and Tatsumi Ishihara*

” Mixing effects of Cr2O3-PrBaMn2O5 for increased redox cycling properties of Fe powder for a solid oxide Fe-air rechargeable battery”
J. Mater. Chem. A. 5, 364-371 (2017)
DOI: 10.1039/C6TA07911C

 

2016

79. Chahwan Hwang†, Ohhun Gwon†, Hongil Jo, Kang Min Ok*, and Guntae Kim*
” Major role of surface area in perovskite electrocatalysts for alkaline systems”
ChemElectroChem. 4, 468-471 (2017)
DOI: 10.1002/celc.201600755

 

78. Donghwi Jeong, Areum Jun, Young-Wan Ju, Junji Hyodo, Jeeyoung Shin, Tatsumi Ishihara, Tak-Hyoung Lim*, and Guntae Kim*
” Structural, Electrical, and Electrochemical Characteristics of LnBa0.5Sr0.5Co1.5Fe0.5O5+δ (Ln=Pr, Sm, Gd) as Cathode Materials in Intermediate-Temperature Solid Oxide Fuel Cells”
Energy Technology. 5, 1337-1343 (2017)
DOI:10.1002/ente.201600618

 

77. Sangwook Joo, Junyoung Kim, Jeeyoung Shin*, Tak-Hyoung Lim*, and Guntae Kim*
” Investigation of a Layered Perovskite for IT-SOFC Cathodes: B-Site Fe-Doped YBa0.5Sr0.5Co2-xFexO5+d”
J. Electrochem. Soc. 163 (14)  F1489-F1495 (2016)
DOI: 10.1149/2.0371614jes

 

76. Ye-Ri Jang, Ju-Myung Kim, Jung-Han Lee, Sung-Ju Cho, Guntae Kim, Young-wan Ju, Sun-Hwa Yeon*, JongTae Yoo* and  Sang-Young Lee*
“Molecularly-Designed, Dual-Doped Mesoporous Carbon/SWCNT Nanoshields for Lithium Battery Electrode Materials”
J. Mater. Chem. A . 4, 14996-15005 (2016)
DOI: 10.1039/C6TA06666F

 

75.  Areum Jun, Junyoung Kim, Jeeyoung Shin, and Guntae Kim*
“Achieving high efficiency and eliminating degradation in solid oxide electrochemical cells using high oxygen capacity perovskite”
Angew. Chem. Int. Ed.  128, 12700-12703 (2016)
DOI: 10.1002/ange.201606972

 

74. Ohhun Kwon, Sivaprakash Sengodan, Chaehyun Lim, Hu Young Jeong, Jeeyoung Shin, Young-Wan Ju*, and Guntae Kim*
” In Situ Surface Modification of Ni-YSZ with BaZrO3 for Enhancing the Sulfur Tolerance of Ni-YSZ Anode”
J. Electrochem. Soc. 163 (9) F1055-F1058 (2016)
DOI: 10.1149/2.0651609jes

 

73. Ohhun Gwon, Changmin Kim, Ohhun Kwon, Hu Young Jeong, Heai-Ku Park, Jeeyoung Shin, Young-Wan Ju*, and Guntae Kim*
“An Efficient Oxygen Evolution Catalyst for Hybrid Lithium Air Batteries: Almond Stick Type Composite of Perovskite and Cobalt Oxide ”
J. Electrochem. Soc. 163 (9) A1893-A1897 (2016)
DOI: : 10.1149/2.0571609jes

 

72.Chaehyun Lim, Areum Jun, Hongil Jo, Kang Min Ok, Jeeyoung Shin, Young-Wan Ju* and Guntae Kim*
“Influence of Ca-doping in layered perovskite PrBaCo2O5+d on the phase transition and cathodic performance of a solid oxide fuel cell”
J. Mater. Chem. A.4, 6479-6486 (2016)
DOI:http://dx.doi.org/10.1039/c6ta00746e

 

71. Sihyuk Choi, Sivaprakash Sengodan, Seonhye Park, Young-wan Ju,  Junyoung KIm, Junji Hyodo, HuYoung Jeong, Tatsumi Ishihara, Jeeyoung shin* and Guntae Kim*
“A robust symmetrical electrode with layered perovskite structure for direct hydrocarbon solid oxide fuel cells: PrBa0.8Ca0.2Mn2O5+d”
J. Mater. Chem. A.  4, 1747-1753 (2016)
DOI: http://dx.doi.org/10.1039/C5TA08878J

 

70. Areum Jun, Junyoung Kim, Jeeyoung Shin, and Guntae Kim,*
“Perovskite as a cathode material: A review of its role in  Solid Oxide Fuel Cell technology”
ChemElectroChem. 3, 511–530 (2016)
DOI: http://dx.doi.org/10.1002/celc.201500382

 

69. Changmin Kim, Ohhun Gwon, In-Yup Jeon, Youngsik Kim, Jeeyoung Shin, Young-Wan Ju*, Jong-Beom Baek*, and Guntae Kim*
“Cloud-like graphene nanoplatelets on Nd0.5Sr0.5CoO3-d nanorod as an efficient bifunctional electrocatalyst for hybrid Li-air batteries”
J. Mater. Chem. A. 4, 2122-2127 (2016)
DOI: http://dx.doi.org/10.1039/C5TA08493H

 

2015

 

68. Erik Enriquez, Xing Xu, Shanyong bao, Zach Harrell, Chonglin Chen*, Sihyuk Choi, Areum Jun, Guntae Kim and Myung-Hwan Whangbo
“Catalytic Dynamics and Oxygen Diffusion in Doped PrBaCo2O5.5+d Thin Films”
ACS Appl. Mater. Interfaces.  7 (43), pp 24353-24359 (2015)
DOI: 10.1021/acsami.5b07688

 

67. Areum Jun, Young-wan Ju, and Guntae Kim,*
“Solid oxide electrolysis: Concluding remarks”
Faraday Discuss.182, 519-528 (2015)
DOI: http://dx.doi.org/10.1039/C5FD90072G

 

66. Dong-Gue Lee, Ohhun Gwon, Han-Saem Park, Su Hwan Kim, Juchan Yang, Sang Kyu Kwak, Guntae Kim,* and Hyun-Kon Song*
“Conductivity-Dependent Completion of Oxygen Reduction on Oxide Catalysts”
Angew. Chem. Int. Ed. 54, 15730–15733 (2015)
DOI: http://dx.doi.org/10.1002/anie.201508129

 

65. Young-Wan Ju,† Seonyoung Yoo,† Limin Guo, Changmin Kim, Atsushi Inoishi, HuYoung Jeong, Jeeyoung Shin, Tatsumi Ishihara, Sung-Dae Yim*, and Guntae Kim*
“Honeycomb-Like Perovskite Oxide Electrocatalyst for a Hybrid Li-Air Battery”
J. Electrochem. Soc. 162. A2651-55 (2015)
DOI: http://dx.doi.org/10.1149/2.0311514jes

 

64. Young-Wan Ju,† Seonyoung Yoo,† Changmin Kim, Seona Kim, In-Yup Jeon, Jeeyoung Shin, Jong-Beom Baek*, and Guntae Kim*
“Fe@N-Graphene Nanoplatelet-Embedded Carbon Nanofibers as Efficient Electrocatalysts for Oxygen Reduction Reaction”
Advanced Science.  3 ,1500205-1500209 (2015)
DOI: http://dx.doi.org/10.1002/advs.201500205

 

63. Seona Kim, Areum Jun, Ohhun Kwon, Junyoung Kim, Seonyoung Yoo, Hu Young Jeong, Jeeyoung Shin*, and Guntae Kim*
“Nanostructured Double Perovskite Cathode With Low Sintering Temperature For Intermediate Temperature Solid Oxide Fuel Cells”
ChemSusChem. 8 (18) 3153-3158 (2015)
DOI: http://dx.doi.org/10.1002/cssc.201500509/

 

62. In-Yup Jeon, Min Choi, Hyun-Jung Choi, Sun-Min Jung, Min-Jung Kim, Jeong-Min Seo, Seonyoung Yoo, Guntae Kim, Hu young Jeong*, Noejung Park*, and Jong-Beom Baek*
“Antimony-doped graphene nanoplatelets”
Nature Communications. 6. 7123 (2015)
DOI: http://dx.doi.org/10.1038/ncomms8123

 

61. Areum Jun, Seonyoung Yoo, Young-wan Ju, Junji Hyodo, Sihyk Choi, Hu Young Jeong, Jeeyoung Shin, Tatsumi Ishihara, Tak-hyoung Lim*, and Guntae Kim*
“Correlation between fast oxygen kinetics and enhanced performance in Fe doped layered perovskite cathode for solid oxide fuel cells”
J. Mater. Chem. A.  3, 15082-15090  (2015)
DOI: http://dx.doi.org/10.1039/C5TA02158H

 

60. In-Yup Jeon, Changmin Kim, Guntae Kim, Jong-Beom Baek*
“Mechanochemically driven iodination of activated charcoal for metal-free electrocatalyst for fuel cells and hybrid Li-air cells”
Carbon. 93, 465-472 (2015)
DOI: http://dx.doi.org/10.1016/j.carbon.2015.05.075

 

59. Sang Hun Shin, Jeong Hyeon Lee, Jung Ki Lee, Jun Lim, Sihyuk Choi, Guntae Kim and Ji Hyun Kim*
“ Measurement of EMF in liquid sodium using a Gadolinia-Doped Ceria solid electrolyte”
J. Electrochem. Soc. 162 (7) B15-158 (2015)
DOI: http://dx.doi.org/10.1149/2.0301507jes

 

58. Sihyuk Choi, Seonhye Park, Jeeyoung Shin*, and  Guntae Kim*

“The effect of calcium doping on the improvement of performance and durability in a layered perovskite cathode for intermediate-temperature solid oxide fuel cells”

J. Mater. Chem. A.  3, 6088-6095 (2015)

DOI: http://dx.doi.org/10.1039/c4ta05684a

 

57. Sivaprakash Sengodan†, Sihyuk Choi†, Areum Jun, Tae Ho Shin, Young-Wan Ju, Hu Young Jeong, Jeeyoung Shin, John T.S. Irvine*, and Guntae Kim*
“Layered oxygen-deficient double perovskite as an efficient and stable anode for direct hydrocarbon solid oxide fuel cells”
Nature Materials. 14. 205-209 (2015)
DOI: http://dx.doi.org/10.1038/NMAT4166

 

2014

 

56. Dae-Wi Kim, Ui-Jin Yun, Jong-Won Lee, Tak-Hyoung Lim*, Seung-Bok Lee, Seok-Joo Park, Rak-Hyun Song, Guntae Kim
“Fabrication and operating characteristics of a flat tubular segmented-in-series solid oxide fuel cell unit bundle“
Energy.  17, 215-221 (2014)
DOI: https://doi.org/10.1016/j.energy.2014.05.026

 

55. Yuri Choi†, Sihyuk Choi†, Hu Young Jeong, Meilin Liu, Byeong-Su Kim*, and Guntae Kim*
“Highly Efficient Layer-by-Layer-Assisted Infiltration for High Performance and Cost-Effective Fabrication of Nanoelectrodes”
ACS Appl. Mater. Interfaces.  6, 17352-17357 (2014)
DOI: http://dx.doi.org/10.1021/am5048834

 

54. Seona Kim, Sihyuk Choi, Areum Jun, Jeeyoung Shin*, and Guntae Kim*
“Scale-Down and Sr-Doping Effects on La4Ni3O10-d-YSZ Nanocomposite Cathode for IT-SOFCs”
J. Electrochem. Soc. 161 (14) F1468-F1473 (2014)
DOI: http://dx.doi.org/10.1149/2.0791414jes

 

53. Seonyoung Yoo, Areum Jun, Young-Wan Ju, Dorj Odkhuu, Junji Hyodo, Hu Young Jeong, Noejung Park, Jeeyoung Shin, Tatsumi Ishihara, and Guntae Kim*
“Development of Double-Perovskite Compounds as Cathode Materials for Low Temperature Solid Oxide Fuel Cells”
Angew. Chem. Int. Ed. 53, 13064-13067 (2014)
DOI: http://dx.doi.org/10.1002/anie.201407006

 

52. Anthony S. Yu, Junyoung Kim, Tae-Sik Oh, Guntae Kim, Raymond J. Gorte, and John M. Vohs*
“Decreasing Interfacial Losses with Catalysts in La0.9Ca0.1FeO3-d Membranes for Syngas Production”
Appl. Catal. A. 486, 259-265 (2014)
DOI: http://dx.doi.org/10.1016/j.apcata.2014.08.028

51. Ohhun Gwon, Seonyoung Yoo, Jeeyoung Shin*, and Guntae Kim*
“Optimization of La1-xSrxCoO3-d perovskite cathodes for intermediate-temperature solid oxide fuel cells through the analysis of crystal structure and electrical properties”
Int. J. Hydrogen Energy. 39, 20806-20811 (2014)
DOI: http://dx.doi.org/10.1016/j.ijhydene.2014.07.137

50. Changmin Kim, Junyoung Kim, Jeeyoung Shin*, and Guntae Kim*
“Effects of composite cathode on electrochemical and redox properties for intermediate-temperature solid oxide fuel cells”
Int. J. Hydrogen Energy. 39  20812-20818 (2014)
DOI: http://dx.doi.org/10.1016/j.ijhydene.2014.07.007

 

49. Areum Jun, Tak-hyoung Lim, Jeeyoung Shin*, and Guntae Kim*
“Electrochemical properties of B-site Ni doped layered perovskite cathodes for IT-SOFCs”
Int. J. Hydrogen Energy. 39  20791-20798 (2014)
DOI: http://dx.doi.org/10.1016/j.ijhydene.2014.06.136

48. Junyoung Kim, Sivaprakash Sengodan, Goeun Kwon, Dong Ding, Jeeyoung Shin, Meilin Liu, and Guntae Kim*
“Triple Conducting (H+/O2-/e-) Layered Perovskite : Stable and High-Performance Cathode Materials For Proton Conducting SOFCs”
ChemSusChem. 7 , 2811-2815 (2014)
DOI: http://dx.doi.org/10.1002/cssc.201402351

 

47. Junyoung Kim, Sihyuk Choi, Areum Jun, Hu Young Jeong, Jeeyoung Shin, and Guntae Kim*
“Chemically Stable Perovskites as a Cathode Material for IT-SOFCs: La doped Ba0.5Sr0.5Co0.8Fe0.2O3-d”
ChemSusChem. 7 , 1669-1675 (2014)
DOI: http://dx.doi.org/10.1002/cssc.201301401

 

46. Young-Wan Ju, Areum Jun, Atsushi Inoishi, Shintaro Ida, Tak-hyoung Lim, Guntae Kim*, and Tatsumi Ishihara*
“Growth of Thin-Film Layered Perovskite Cathodes by Pulsed Laser Deposition and their Electrochemical Studies in IT-SOFCs”
J. Electrochem. Soc. 161 (5), F668-F673 (2014)
DOI: http://dx.doi.org/10.1149/2.020406jes

 

45. Seonyoung Yoo, Jiyoun Kim, Seung Yoon Song, Dong Woo Lee, Jeeyoung Shin, Kang Min Ok*, and Guntae Kim*
“Structural, electrical and electrochemical characteristics of La0.1Sr0.9Co1-xNbxO3-d as a cathode material for intermediate temperature solid oxide fuel cells”
RSC Advances. 4 , 18710 (2014)
DOI: http://dx.doi.org/10.1039/C4RA02061H

 

44. Sivaprakash Sengodan, Mingfei Liu, Tak-Hyoung Lim, Jeeyoung Shin, Meilin Liu, and Guntae Kim
“Enhancing Sulfur Tolerance of a Ni-YSZ Anode through BaZr0.1Ce0.7Y0.1Yb0.1O3-d Infiltration”
J. Electrochem. Soc. 161 (5), F668-F673 (2014)
DOI: http://dx.doi.org/10.1149/2.068405jes

 

43. Seonhye Park, Sihyuk Choi, Jeeyoung Shin, and  Guntae Kim*
“Tradeoff optimization of electrochemical performance and thermal expansion for Co-based cathode material for intermediate-temperature solid oxide fuel cells”
Electrochimica Acta. 125, 683 (2014)
DOI: http://dx.doi.org/10.1016/j.electacta.2014.01.112

 

42. Seonhye Park, Sihyuk Choi, Jeeyoung Shin, and  Guntae Kim*

“A collaborative study of sintering and composite effects for PrBa0.5Sr0.5Co2-xFexO5-d IT-SOFC cathode”
RSC Advances. 4 , 1775 (2014)
DOI: http://dx.doi.org/10.1039/C3RA45296D

 

41. Junyoung Kim, Areum Jun, Jeeyoung Shin, and Guntae Kim*

“Effect of Fe Doping on Layered GdBa0.5Sr0.5Co2O5+d Perovskite Cathodes for Intermediate Temperature Solid Oxide Fuel Cells”
J. Am. Ceram. Soc. 97,  651-656 (2014)
DOI: http://dx.doi.org/10.1111/jace.12692

 

2013

 

40. Areum Jun, Jeeyoung Shin, and Guntae Kim*
“High redox and performance stability of layered SmBa0.5Sr0.5Co1.5Cu0.5O5+d perovskite cathodes for intermediate-temperature solid oxide fule cells”
Phys. Chem. Chem. Phys. 15 , 19906 (2013)
DOI: http://dx.doi.org/10.1039/c3cp53883d

 

39. Jiyoun Kim, Sihyuk Choi, Seonhye Park, Changmin Kim, Jeeyoung Shin, and Guntae Kim*

“Effect of Mn on the electrochemical properties of a layered perovskite NdBa0.5Sr0.5Co2-xMnxO5+δ (x = 0, 0.25, and 0.5) for intermediate-temperature solid oxide fuel cells”
Electrochimica Acta. 112 , 712 (2013)
DOI: http://dx.doi.org/10.1016/j.electacta.2013.09.014

 

38. Sihyuk Choi, Seonyoung Yoo, Jiyoun Kim, Seonhye Park, Areum Jun, Sivaprakash Sengodan, Junyoung Kim, Jeeyoung Shin, Hu Young Jeong, YongMan Choi, Meilin Liu*, and Guntae Kim*
“Highly efficient and robust cathode materials for low-temperature solid oxide fuel cells: PrBa0.5Sr0.5Co2-xFexO5-d”
Scientific Reports.  3 , 2426 (2013)
DOI: http://dx.doi.org/10.1038/srep02426

 

37. Sookyung Jeong, Jung-Pil Lee, Minseong Ko, Guntae Kim, Soojin Park,* and Jaephil Cho*
“Etched Graphite with Internally Grown Si Nanowires from Pores as an Anode for High Density Li-ion Batteries”
Nano Lett. 13 , 3403-3407 (2013)
DOI: http://dx.doi.org/10.1021/nl401836c

 

36. Sihyuk Choi, Seonhye Park, Junyoung Kim, Tak-Hyoung Lim, Jeeyoung Shin, Guntae Kim*
“Electrochemical properties of an ordered perovskite LaBaCo2O5+d-Ce0.9Gd0.1O2-d composite cathode with strontium doping for intermediate-temperature solid oxide fuel cells”
Electrochem. commun. 34 , 5-8 (2013)
DOI: http://dx.doi.org/10.1016/j.elecom.2013.04.016

 

35. Seonyoung Yoo, Sihyuk Choi, Junyoung Kim, Jeeyoung Shin, Guntae Kim*
“Investigation of layered perovskite type NdBa1-xSrxCo2O5+d (x = 0, 0.25, 0.5, 0.75, and 1.0) cathodes for intermediate-temperature solid oxide fuel cells”
Electrochim. Acta. 100 , 44-50 (2013)
DOI: http://dx.doi.org/10.1016/j.electacta.2013.03.041

 

34. Sivaprakash Sengodan, Jong Seol Yoon, Mi Young Yoon, Hae Jin Hwang, Jeeyoung Shin, Guntae Kim*
“Electrochemical performance of YST infiltrated and Fe doped YST infiltrated YSZ anodes for IT-SOFC”
ECS Electrochem. Lett. 2 , F45-F49 (2013)
DOI: http://dx.doi.org/10.1149/2.004306eel

 

33. Jiyoun Kim, Jeeyoung Shin, Meilin Liu, Guntae Kim*
“Composite cathodes composed of NdBa0.5Sr0.5Co2O5+d and Ce0.9Gd0.1O1.95 for intermediate-temperature solid oxide fuel cells”
J. Mater. Chem. 1, 515 (2013)
DOI: http://dx.doi.org/10.1039/c2ta00025c

 

32. Areum Jun, Seonyoung Yoo, Ohhun Gwon, Jeeyoung Shin, Guntae Kim*
“Thermodynamic and electrical properties of Ba0.5Sr0.5Co0.8Fe0.2O3-δ and La0.6Sr0.4Co0.2Fe0.8O3-δ for intermediate-temperature solid oxide fuel cells”
Electrochim. Acta. 89,  372– 376 (2013)
DOI: http://dx.doi.org/10.1016/j.electacta.2012.11.002

 

31. Seonyoung Yoo, Tak-Hyoung Lim, Jeeyoung Shin, Guntae Kim*
“Comparative characterization of thermodynamic, electrical, and electrochemical properties of Sm0.5Sr0.5Co1-xNbxO3-δ (x = 0, 0.05, 0.1) as cathode materials in intermediate temperature solid oxide fuel cells”
J. Power Sources. 226 , 1-7 (2013)
DOI: http://dx.doi.org/10.1016/j.jpowsour.2012.10.069

 

2012

 

30. Areum Jun, Junyoung Kim, Jeeyoung Shin, Guntae Kim*
“Optimization of Sr content in layered SmBa1-xSrxCo2O5+δ perovskite cathodes for intermediate-temperature solid oxide fuel cells”
Int. J. Hydrogen Energy. 27, 18381-18388 (2012)
DOI: http://dx.doi.org/10.1016/j.ijhydene.2012.09.048

 

29. Sivaprakash Sengodan, Sunghoo Ahn, Jeeyoung Shin, Guntae Kim*
“Oxidation-reduction behavior of La0.8Sr0.2ScyMn1−yO3±δ (y=0.2, 0.3, 0.4): Defect structure, thermodynamic and electrical properties”
Solid State Ionics. 228, 25-31 (2012)
DOI: http://dx.doi.org/10.1016/j.ssi.2012.09.004

 

38. Seonhye Park, Sihyuk Choi, Junyoung Kim, Jeeyoung Shin, Guntae Kim*
“Strontium Doping Effect on High-Performance PrBa1-xSrxCo2O5+d as a Cathode Material for IT-SOFCs”,
ECS Electrochem. Lett.  1, F29-F32 (2012)
DOI: http://dx.doi.org/10.1149/2.007205eel

 

27. Sihyuk Choi, Jeeyoung Shin, Kang Min Ok, Guntae Kim*
“Chemical Compatibility, redox behavior, and electrochemical performance of Nd1-xSrxCoO3-d cathodes based on Ce1.9Gd0.1O1.95 for intermediate-temperature solid oxide fuel cells”
Electrochim. Acta. 81, 217-223 (2012)
DOI:  http://dx.doi.org/10.1016/j.electacta.2012.07.090

 

26. Seonyoung Yoo, Sihyuk Choi, Jeeyoung Shin, Meilin Liu, Guntae Kim*
“Electrical Properties, Thermodynamic Behavior, and Defect Analysis of Lan+1NinO3n+1+δ Infiltrated into YSZ Scaffolds as Cathodes for Intermediate-Temperature SOFCs”
RSC Advances. 2, 4648-4655 (2012)
DOI: http://dx.doi.org/10.1039/c2ra20402a

 

25. Seonhye Park, Sihyuk Choi, Jeeyoung Shin, Guntae Kim*
“Electrochemical investigation of strontium doping effect on high performance Pr1-xSrxCoO3-d (x = 0.1, 0.3, 0.5, and 0.7) cathode for intermediate-temperature solid oxide fuel cells”
J. Power sources. 210, 172-177 (2012)
DOI: http://dx.doi.org/10.1016/j.jpowsour.2012.03.018

 

24. Sihyuk Choi, Jeeyoung Shin, Guntae Kim*
“The electrochemical and thermodynamic characterization of PrBaCo2-xFexO5+d (x=0, 0.5, 1) infiltrated into yttria-stabilized zircornia scaffold as cathodes for solid oxide fuel cells”
J. Power sources. 201, 10-17 (2012)
DOI: http://dx.doi.org/10.1016/j.jpowsour.2011.09.096

 

2011

23. Sivaprakash Sengodan, Jihoon Kim, Jeeyoung Shin, Guntae Kim*
“Thermodynamic Properties, Defect Analysis, and Electrical Conductivity of the La0.8Sr0.2ScxMn1-xO3-d Infiltrated into YSZ Scaffolds”
J. Electrochem. Soc. 158(11) B1373-B1379 (2011)
DOI: http://dx.doi.org/10.1149/2.043111jes

 

22. Jungdeok Park, Jing Zou, Heechul Yoon, Guntae Kim, Jong Shik Chung
“Electrochemical behavior of Ba0.5Sr0.5Co0.2-xZnxFe0.8O3-d (x=0-0.2) perovskite oxides for the cathode of solid oxide fuel cells”
Int. J. Hydrogen Energy .36, 6184-6193 (2011)
DOI: http://dx.doi.org/10.1016/j.ijhydene.2011.01.142

 

21. Sihyuk Choi, Seonyoung Yoo, Jee-Young Shin, and Guntae Kim*
“High Performance SOFC Cathodes Prepared by Infiltration of Lan+1NinO3n+1 (n=1,2, and 3) in Porous YSZ”
J. Electrochem. Soc. 158(8) B995-B999 (2011)
DOI: http://dx.doi.org/10.1149/1.3598170

 

20. Seonyoung Yoo, Jee Young Shin, and Guntae Kim*
“Thermodynamic and Electrical Properties of Layered Perovskite NdBaCo2-xFexO5+d-YSZ (x=0,1) Composites for Intermediate Temperature SOFC Cathodes”
J. Electrochem.Soc. 158(6) B632-B638 (2011)
DOI: http://dx.doi.org/10.1149/1.3571008

 

19. S.Sengodan, H.J. Yeo, J. Y. Shin, and G. Kim*
“Assessment of Perovskite-type La0.8Sr0.2ScxMn1-xO3−δ Oxides as an Anode for Intermediate Temperature Solid Oxide Fuel Cells using Hydrocarbon”
J. Power sources. 196, 3083-3088 (2011)
DOI: http://dx.doi.org/10.1016/j.jpowsour.2010.11.161

 

18. Seonyoung Yoo, Jee Young Shin and Guntae Kim*
“Thermodynamic and electrical characteristics of NdBaCo2O5+d at various oxidation and reduction states”
J. Mater. Chem. 21, 439-443 (2011)
DOI: http://dx.doi.org/10.1039/c0jm01779e

 

~ 2010

 

17. Shuangyan Wang, Jongsik Yoon, Guntae Kim, Daxiang Huang, Haiyan Wang, Allan J. Jacobson*
“Electrochemical Properties of Nanocrystalline La0.5Sr0.5CoO3-x Thin Films”
Chem. Mater. 22, 776-782 (2010)
DOI: http://dx.doi.org/10.1021/cm9014139

 

16. Heai-Ku Park, Guntae Kim
“Ammounim hexavanadate nanorods prepared by homogeneous precipitation using urea as cathodes for lithium batteries”
Solid State Ionics. 181, 311-314 (2010)
DOI: http://dx.doi.org/10.1016/j.ssi.2010.01.011

 

15. F. Bidrawn, G. Kim, N. Aramrueang,  J. M. Vohs, and R. J. Gorte
“Dopants to Enhance SOFC Cathodes Based on Sr-Doped LaFeO3 and LaMnO3”
J. Powersources. 195, 720–728 (2010)
DOI: http://dx.doi.org/10.1016/j.jpowsour.2009.08.034

 

14. Gael Corr, Guntae Kim, M. Cassidy, John T.S. Irvine, John M. Vohs and Raymond J. Gorte
“Activation and Ripening of Impregnated Manganese Containing Perovskite SOFC Electrodes under Redox Cycling”,
Chem. Materials. 21, 1077-1084 (2009).
DOI: http://dx.doi.org/10.1021/cm803149v

 

13. Guntae Kim, S. Lee, J.Y. Shin, J. T.S. Irvine, J. M. Vohs and R. J. Gorte,
“Investigation of the Structural and Catalytic Requirements for High-Performance SOFC Anodes Form by Infiltration of LSCM”,
Electrochem. Solid-State Lett. 12(3), B48-B52 (2009).
DOI: http://dx.doi.org/10.1149/1.3065971

 

12. Shiwoo Lee, Guntae Kim, John M. Vohs and Raymond J. Gorte
“SOFC Anodes Based on Infiltration of La0.3Sr0.7TiO3”,
J. Elecrochem. Soc. 155 (11), B1179-B1183 (2008).
DOI: http://dx.doi.org/10.1149/1.2976775

 

11. Guntae Kim, John M. Vohs and Raymond J. Gorte
“Enhanced Reducibility of Ceria-YSZ Composites in Solid Oxide Electrodes”,
J. Mater. Chem. 18, 2386-2390 (2008).
DOI: http://dx.doi.org/10.1039/b718931a

 

10. G. Kim, F. Bidrawn, G. Corre, J. T. S. Irvine, J. M. Vohs, and R. J. Gorte,
“Efficient Reduction of CO2 in a Solid Oxide Electrolyzer”,
Electrochem. Solid-State Lett. 11(9), B167-B170 (2008).
DOI: http://dx.doi.org/10.1149/1.2943664

 

9. Guntae Kim, Michael D. Gross, Wensheng Wang, John M. Vohs and Raymond J. Gorte,
“SOFC Anodes Based on LST-YSZ Composites and on Y0.04Ce0.48Zr0.48O2”,
J. Elecrochem. Soc. 155(4), B360-B366 (2008).
DOI: http://dx.doi.org/10.1149/1.2840473

 

8. Guntae Kim, Gael Corr, John T.S. Irvine, John M. Vohs and Raymond J. Gorte
“Engineering Composite Oxide SOFC Anodes for Efficient Oxidation of Methane”,
Electrochem. Solid-State Lett. 11(2), B16-B19 (2008).
DOI: http://dx.doi.org/10.1149/1.2817809

 

7. G. Kim, S. Wang, A. J. Jacobson, L. Reimus, P. Brodersen and C. A. Mims,
“Rapid Oxygen Ion Diffusion and Surface Exchange Kinetics in PrBaCo2O5+x with a Perovskite Related Structure and Ordered A Cations”,
J. Mater. Chem. 17(24), 2500 (2007).
DOI: http://dx.doi.org/10.1039/b618345j

 

6. G. T. Kim, S. Wang, A. J. Jacobson, Z Yuan and C, L, Chen,
“Impedance Studies of Dense Polycrystalline Thin Films of La2NiO4+δ”,
J. Mater. Chem. 17(13), 1316 (2007).
DOI: http://dx.doi.org/10.1039/b616101d

 

5. Z. Yuan, J. Liu, C. L. Chen, C. H. Wang, X. G. Luo, H. Chen, G. Kim, D. X. Huang, S. Wang, A. J. Jacobson and W. Donnor,
“Epitaxial Behavior and Transport Properties of PrBaCo2O5 Thin Films on (001) SrTiO3”,
Applied Physics Letters. 90, 212111 (2007).
DOI: http://dx.doi.org/10.1063/1.2741407

 

4. G. Kim, S. Wang, A. J. Jacobson, C. L. Chen, L. Reimus, P. Brodersen and C. A. Mims,
“Oxygen Exchange Kinetics of PrBaCo2O5.5+ δ Thin Films Prepared by Pulsed-laser Deposition”,
Applied Physics Letters. 88, 024103 (2006).
DOI: http://dx.doi.org/10.1063/1.2163257

 

3. G. Kim, S. Wang, A. J. Jacobson and C. L. Chen,
“Measurement of Oxygen Transport Kinetics in Epitaxial La2NiO4+δ Thin Films by Electrical Conductivity Relaxation”,
Solid State Ionics. 177, 1461 (2006).
DOI: http://dx.doi.org/10.1016/j.ssi.2006.07.013

 

2. Heai-Ku Park, Gun-Tae Kim and Man-Ho Lee,
“The Electrochemical Properties on the Silver Doped Vanadium Oxide Xerogel“,
J. the Korean Chemical Society. 5(1), 1-6 (2002).

 

1. Woo-Won Jeung, Sam-Su Park, Gun-Tae Kim and Man-Ho Lee,
“Solution and Solid-State Vanadium-51 NMR Studies of Dioxovanadate(V) Complexes”,
J. Korean Magn. Reson. 2, 113 (1998).

research

 < Solid Oxide Fuel Cell  >

Fuel cells allow the direct conversion of chemically stored energy into electrical energy by means of electrochemical oxidation of various fuels. Solid oxide fuel cells (SOFCs) are considered to be among the most promising fuel cells.

1(33)
  • Advantage of Solid Oxide Fuel Cells

– Environmentally friendly: low emission, less CO2
– High efficiency.
– Fuel flexibility & Non-Precious metal catalyst.
– High-quality waste heat for cogeneration applications

In SOFCs, an oxygen reduction reaction occurs at the cathode to produce oxygen anions, which then move through a dense oxygen-ion-conducting electrolyte to the anode. Current state-of-the-art technology SOFCs can produce electrical energy with very high efficiency, low emissions, and excellent fuel flexibility at operating temperatures.

  • Materials for Cathode applications

2(11)
■ Layered perovskite, LnBaCo2O5 (Ln = Pr, Nd, Sm, Gd)
· The best cathode materials for intermediate-temperature solid oxide fuel cell
· Rapid oxygen diffusion, surface exchange kinetics and high electrical conductivity
· Layered perovskite (LnBaCo2O5), Ruddlesden-Popper series (Lan+1NinO3n+1)

  • Materials for Anode applications

Mixed ionic-electronic conductors (MIECs) have been developed as ceramic anode materials because of their great durability under anodic operating conditions. Their excellent tolerance to carbon coking and sulphur poisoning, especially, could facilitate the efficient operation of the SOFC directly with natural gas. The A-site layered double perovskite materials including mixed valence transition metal cations provide high electrical conductivity and maintain a large oxygen vacancy content, contributing to fast oxygen ion diffusion and good catalytic activity towards fuel oxidations.

3(6)

< Proton Conducting SOFCs >

Proton-conducting oxides are ideally suited for the electrolytes of intermediate and low temperatures (400~600 oC)-SOFCs because of their low activation energy and high ionic conductivity. In addition, proton-conducting SOFC (H+-SOFC) can avoid water formation, and thus dilution of the fuel, on the anode side during operation because water will form on the cathode side of the cell, which can lead to higher fuel utilization and greater Nernst potential of SOFCs. One of the basic requirements for high-performing H+-SOFC cathode material is the high conductivity of the electron, oxide ion, and proton with the high chemical stability. In this regards, the triple conducting (H+/O2-/e-) oxides (TCOs) effectively extend the electrochemically active site to the entire surface of cathode.

  • 4(6)Applications

5(9)

< Solid Oxide Electrolysis >

Solid-oxide electrolyzers (SOEs), which are essentially solid-oxide fuel cells (SOFCs) operated in reverse, are capable of higher water electrolysis efficiency levels compared to solution-based electrolysis cells because they operate at higher temperatures, i.e., around 925 K. The higher operating temperature results in a lower Nernst potential, the thermodynamic potential required for water splitting, and in lower electrode overpotentials.

6(1)
< Metal-Air Battery >

Metal-air batteries are powered by oxidizing metal with oxygen from the air. The major appeal of the metal-air batteries is the extremely high specific energy, a measure of the amount of energy a battery can store for a given weight.

 

7(2) (1)

  •  Zn-air battery
    Fuel Electrode: 2Zn + 8OH− → 2Zn(OH)42− + 4e−
    Fluid: 2Zn(OH)42− → 2ZnO + 2H2O + 4OH−
    Air Electrode: O2 + 2H2O + 4e− → 4OH−
    Overall: 2Zn + O2 → 2ZnO(s) (E0 = 1.59 V)
  • Hybrid Li-air battery
    Fuel Electrode : 4Li → 4Li+ + 4e−
    Air Electrode : O2 + 2H2O + 4e− → 4OH−
    Overall: 4Li + O2 + 2H2O → 4LiOH(aq) (E0 = 3.43 V)

< Membrane Reactor >

The production of syngas is one of the most important industrial processes that provides the building blocks used in the production of valuable chemicals. Conventional processes are highly energy intensive due to their endothermic reaction and require an expensive O2 plant to avoid diluting the products. Recently, it has been proposed that ceramic membrane reactors based on mixed ionic and electronic conductors could greatly enhance the efficiency of reactions compared to conventional processes.

8(1)

 < Polymer Electrolyte Membrane Fuel Cell >


gv3

  • PEMFC is a promising energy transformation technology from chemical energy to electric energy with oxidation of hydrogen and reduction of oxygen.
  • PEMFC possesses powerful characteristic, such as low pollution, high power efficiency, low operating temperatures (55-95 oC) and stable power generation.
  • We have focused on advanced catalysts for oxygen reduction reaction in cathode using carbon-based materials.

 

Current

  • M&D Course

– Jeongwon Kim : kimgarden@unist.ac.kr

– Arim Seong : sar4127@unist.ac.kr

– Hyunmin Kim : aanele2@unist.ac.kr

– Yejin Yang : yejin213@unist.ac.kr

– Dang Thi Kim Ngoc : ngocdangkvl@unist.ac.kr

– Sewon Pyo : sewon0129@unist.ac.kr

– Minseo Kim : mingstand8142@unist.ac.kr

– Hyoi Jo :  johyoi930@unist.ac.kr

– Eunyoung Cho : eunojo@unist.ac.kr

 

  • Master Course

– Jinkyung Oh : leianoh@unist.ac.kr

  • Undergraduate

– Yeongbae Jeon : zeroship16@unist.ac.kr

Alumni

  • Visiting Professor

– Prof. Jeeyoung Shin

E-mail : jshin@sookmyung.ac.kr

Division of Mechanical Systems Engineering, Sookmyung Women’s University, Seoul, 04310, Republic of Korea.

 

– Prof. Choi, Sihyuk

E-mail : sh.choi@kumoh.ac.kr

Department of Mechanical Engineering, Kumoh National Institute of Technology, Republic of Korea.

 

– Prof. Yongwook Sin / Research Professor

E-mail : ywsemarc@gmail.com, ywsemarc@unist.ac.kr

Department of Energy Engineering, Ulsan National Institute of Science and Technology

 

  • Alumni

– Sangwook Joo, Ph.D. /Post Doctor in University of California San Diego

– Donghwi Jeong, Ph.D. /Researcher in Foosung Co., Ltd.

– Chaehyun Lim, Ph.D. /Researcher in Doosan Fuel Cell

– Changmin Kim, Ph.D. / Post Doctor in The University of New South Wales

– Ohhun Kwon, Ph.D. / Post Doctor in University of Pennsylvania

– Sihyuk Choi, Ph.D. / Assistant Professor in Department of Mechanical Engineering, Kumoh National Institute of Technology

– Sivaprakash Sengodan, Ph.D. /Research Fellow in Imperial College London

– Seona Kim, Ph.D. /Researcher in Hyndai

– Hyojae Hwang, M.S. /Researcher in Hyundai Engineering

– Seungtae Lee, M.S.

– Gihyeon Kim, M.S.

– Jiyeon Kim, M.S.

– Seonhye Park, M.S.

 

  • Post Doc. Researcher

– Yunfei Bu, Ph.D. / Professor in School of Environmental Science and Technology, Nanjing University of Information Science and Technology

– Sivaprakash Sengodan, Ph.D. /Research Fellow in Imperial College London

– Arunchander Asokan, Ph.D.

– Thangavel Pandiarajan, Ph.D.

 

  • Researcher Professor

– Young-Wan Ju, Ph.D. / Professor in Department of Chemical Engineering, Wonkwang University

 

GT Research Group

gt@gtchem.co.kr