‡Equal contribution, *corresponding author
47. Highly active air electrode with enhanced proton conduction via isovalent doping in a layered perovskite for reversible protonic ceramic cells
Jiwon Yun, Hyeongsik Shin, Seungchan Kim, Boseok Seong, Seongjae Lee, Kyeounghak Kim*, Sun Hee Choi*, Sihyuk Choi*
Advanced Functional Materials (2025), Online published / (IF:18.5, JCR Top: 4.1%)
46. Failure of protonic ceramic fuel cells (PCFCs) under gaseous Cr and CO2 exposure and the introduction of a protective barrier layer for mitigation
Yeji Lim‡, Jong Heon Chong‡, Puspendu Guha, Wan-Jae Lee, Inhyeok Cho, Seol Hee Oh, Junseok Kim, Kyung Joong Yoon, Ji-Won Son, Jong-Ho Lee, Sihyuk Choi, Deok-Hwang Kwon, Ho-Il Ji*, Sungeun Yang*
Journal of Materials Chemistry A, 13, 17709-17719 / (IF:10.8, JCR Top: 9.1%)
45. High-performance and excellent thermal cycling stability of reversible protonic ceramic cells enabled by a promising Sr/Co-free PrNi0.5Fe0.5O3-d air electrode
Boseok Seong, Jiwon Yun, Sihyuk Choi*
Journal of Materials Chemistry A, 12 (46), 32084-32094 (2024) / (IF:10.8, JCR Top: 9.1%)
44. Understanding direct-ammonia protonic ceramic fuel cells: High-performance in the absence of precious metal catalysts
Jiwon Yun, Grace Xiong, Seungchan Kim, Dylan Bardgett, Sihyuk Choi*, Sossina M. Haile*
ACS Energy Letters 9 (11), 5520-5528 (2024) / (IF:19.5, JCR Top: 3.8%)
43. Recent research trends in layered perovskite-type air electrodes for reversible protonic ceramic fuel cells
Hyeongsik Shin, Jiwon Yun, Boseok Seong, Jinwoo Lee, Sihyuk Choi*
Ceramist 27(3), 291-308 (2024)
42. Dual-Phase Reaction Sintering for Overcoming the Inherent Sintering Ability of Refractory Electrolytes in Protonic Ceramic Cells
Junseok Kim, Jiwon Yun, Wanjae Lee, Do-Hyeong Kim, Puspendu Guha, Jin-Ha Hwang, Deok-Hwang Kwon, Sungeun Yang, Jong-Ho Lee, Kyung Joong Yoon, Ji-Won Son, Sahn Nahm, Sihyuk Choi*, Ho-Il Ji*
Advanced Energy Materials 2400787 (2024) / (IF:27.8, JCR Top: 2.5%)
41. Electrochemical Evaluation of Mixed Ionic and Electronic Conductor-Proton Conducting Oxide Composite Cathode for Protonic Ceramic Fuel Cells
Hyeongsik Shin, Jinwoo Lee, Sihyuk Choi*
Journal of Hydrogen and New Energy 35, 48-55 (2024)
40. Correlation between hydration properties and electrochemical performances on Ln cation size effect in layered perovskite for protonic ceramic fuel cells
Inhyeok Cho, Jiwon Yun, Boseok Seong, Junseok Kim, Sun Hee Choi, Ho-il Ji, Sihyuk Choi*
Journal of Energy Chemistry 88, 1-9 (2024) / (IF:13.1, JCR Top: 2.1%)
39. 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
Arim Seong, Donghwi Jeong, Minseo Kim, Sihyuk Choi*, Guntae Kim*
Journal of Power Sources 530, 231241 (2022)
38. Utilization of an Isovalent Doping Strategy in Cobalt-Free Ferrites for Highly Active and Stable Solid Oxide Fuel Cell Cathodes
Hyunmin Kim‡, Chaesung Lim‡, Ohhun Kwon, Sihyuk Choi*, Jeong Woo Han*, Guntae Kim*
ACS Applied Energy Materials 5(3), 3417-3425 (2022)
37. Progress and outlook for symmetrical solid oxide electrolysis cells
Yunfeng Tian, Nalluri Abhishek, Caichen Yang, Rui Yang, Sihyuk Choi, Bo Chi*, Jian Pu, Yihan Ling*, John T.S. Irvine, Guntae Kim*
Matter 5, 482-514 (2022) / (IF:20.0, JCR Top: 4.5%)
36. Electrochemical Evaluation of Layered Perovskite YBa0.5Sr0.5Co1.5Fe0.5O5+d Cathode as a Triple Ionic and Electronic Conductor for Protonic Ceramic Fuel Cells
Inhyeok Cho, Sihyuk Choi*
Ceramist 24(4), 386-398 (2021)
35. First-Principles Insight into the Effects of Intrinsic Oxygen Defects on Proton Conducting in Ruddlesden-Popper Oxides
Lili Li, Jing Zhou, Zhiwei Hu, Sihyuk Choi, Guntae Kim, Jian-Qiang Wang*, Linjuan Zhang*
The Journal of Physical Chemistry Letters 12, 11503-11510 (2021)
34. Unveiling the key factor for the phase reconstruction and exsolved metallic particle distribution in perovskites
Hyunmin Kim‡, Chaesung Lim‡, Ohhun Kwon‡, Jinkyung Oh, Matthew T. Curnan, Hu Young Jeong, Sihyuk Choi*, Jeong Woo Han*, Guntae Kim*
Nature Communications 12:6814 (2021) / (IF:14.9, JCR Top: 4.9%)
33. Electrokinetic proton transport in triple (H+/O2-/e-) conducting oxides as a key descriptor for highly efficient protonic ceramic fuel cells
Arim Seong‡, Junyoung Kim‡, Donghwi Jeong, Sivaprakash Sengodan, Meilin Liu, Sihyuk Choi*, Guntae Kim*
Advanced Science 8, 2004099 (2021) "Inside Back Cover" / (IF:16.8, JCR Top: 5.2%)
32. The First Observation of Ni Nanoparticle Exsolution from YSZ and its Application for Dry Reforming of Methane
Sangwook Joo‡, Chaehyun Lim‡, Ohhun Kwon, Linjuan Zhang, Jing Zhou, Zian-Qiang Wang, Hu Young Jeong, Yong-wook Sin, Sihyuk Choi*, Guntae Kim*
Materials Report:Energy, 1, 100021 (2021)
31. Local Multimodal Electro-Chemical-Structural Characterization of Solid-Electrolyte Grain Boundaries
Xin Xu,* Connor Carr, Xinqi Chen, Benjamin D. Myers, Ruiyun Huang, Weizi Yuan, Sihyuk Choi, Dezhi Yi, Charudatta Phatak, Sossina M. Haile*
Advanced Energy Materials 2003309 (2021) / (IF:29.4, JCR Top: 2.8%)
30. Cobalt-free Pr0.5Ba0.4Sr0.1FeO3-d as a highly efficient cathode for commercial YSZ-supported solid oxide fuel cell
Hyunmin Kim‡, Sangwook Joo‡, Ohhun Kwon, Sihyuk Choi*, Guntae Kim*
ChemElectroChem 7, 4378-4382 (2020)
29. Ca and Ni doped Pr0.5Ba0.5FeO3-d as a highly active and robust cathode for high-temperature solid oxide fuel cell
Chaehyun Lim, Yejin Yang, Yong-wook Sin*, Sihyuk Choi*, Guntae Kim*
Energy & Fuels 34, 11458-11463 (2020)
28. Review on exsolution and its driving forces in perovskites
Ohhun Kwon‡, Sangwook Joo‡, Sihyuk Choi*, Sivaprakash Sengodan*, Guntae Kim*
Journal of Physics: Energy 2, 032001 (2020)
27. Electrochemical properties of Sr‑doped layered perovskite as a promising anode material for direct hydrocarbon SOFCs
Sihyuk Choi*
Journal of Korean Ceramic Society 57, 409-415 (2020)
26. 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
Seungtae Lee, Seona Kim, Sihyuk Choi*, Jeeyoung Shin*, Guntae Kim*
Journal of the Electrochemical Society 166(12), F805-F809 (2019)
25. Protonic ceramic electrochemical cells for hydrogen production and electricity generation: exceptional reversibility, stability and demonstrated faradaic efficiency
Sihyuk Choi, Timothy C Davenport, Sossina M Haile*
Energy & Environmental Science 12, 206-215 (2019) "2018 Energy and Environmental Science HOT Article" / (IF:33.2, JCR Top: 0.2%)
24. Exceptional power density and stability at intermediate temperatures in protonic ceramic fuel cells
Sihyuk Choi, Chris J Kucharczyk, Yangang Liang, Xiaohang Zhang, Ichiro Takeuchi, Ho-Il Ji, and Sossina M Haile*
Nature Energy 3, 202-210 (2018)
23. Polypyrrole-assisted oxygen electrocatalysis on perovskite oxide
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*
Energy & Environmental Science 10, 523-527 (2017)
22. A robust symmetrical electrode with layered perovskite structure for direct hydrocarbon solid oxide fuel cells: PrBa0.8Ca0.2Mn2O5+δ
Sihyuk Choi, Sivaprakash Sengodan, Seonhye Park, Yong-Wan Ju, Joonyoung Kim, Junji Hyodo, Hu Young Jeong, Tatsumi Ishihara, Jeeyoung Shin*, and Guntae Kim*
Journal of Materials Chemistry A 4, 1747-1753 (2016)
21. Catalytic Dynamics and Oxygen Diffusion in Doped PrBaCo2O5.5+δ Thin Films
Erik Enriquez, Xing Xu, Shanyong Bao, Zach Harrell, Chonglin Chen*, Sihyuk Choi, Areum Jun, Guntae Kim, Myung-Hwan Whangbo
ACS Applied Materials & Interfaces 7, 24353-24359 (2015)
20. Correlation between fast oxygen kinetics and enhanced performance in Fe doped layered perovskite cathode for solid oxide fuel cells
Areum Jun, Seonyoung Yoo, Young-Wan Ju, Junji Hyodo, Sihyuk Choi, Hu Young Jeong, Jeeyoung Shin, Tatsumi Ishihara, Tak-hyoung Lim*, and Guntae Kim*
Journal of Materials Chemistry A 3, 15082-15090 (2015)
19. Measurement of Emf in Liquid Sodium Using a Gadolinia-Doped Ceria Solid Electrolyte
Sang Hun Shin, Jeong Hyeon Lee, Jung Ki Lee, Jun Lim, Sihyuk Choi, Guntae Kim, and Ji Hyun Kim*
Journal of the Electrochemical Society 162(7), B152-B158 (2015)
18. The effect of calcium doping on improvement of performance and durability in a layered perovskite cathode for intermediate-temperature solid oxide fuel cell
Sihyuk Choi, Seonhye Park, Jeeyoung Shin*, and Guntae Kim*
Journal of Materials Chemistry A 3, 6088-6095 (2015)
17. Layered oxygen-deficient double perovskite as efficient and stable anode for direct hydrocarbon solid oxide fuel cells
Sivaprakash Sengodan‡, Sihyuk Choi‡, Areum Jun, Tae Ho Shin, Young-Wan Ju, Hu Young Jeong, Jeeyoung Shin, John TS Irvine*, and Guntae Kim*
Nature Materials 14, 205-209 (2015)
16. Scale-Down and Sr-Doping Effects on La4Ni3O10-d - YSZ Nanocomposite Cathodes for IT-SOFCs
Seona Kim, Sihyuk Choi, Areum Jun, Jeeyoung Shin*, and Guntae Kim*
Journal of the Electrochemical Society 161, F1468-F1473 (2014)
15. Highly Efficient Layer-by-Layer-Assisted Infiltration for High-Performance and Cost-Effective Fabrication of Nanoelectrodes
Yuri Choi‡, Sihyuk Choi‡, Hu Young Jeong, Meilin Liu, Byeong-Su Kim*, and Guntae Kim*
ACS Applied Materials & Interfaces 6, 17352-17357 (2014)
14. Electrochemical Properties of La4Ni3O10-GDC Composite Cathode by Facile Sol-gel Method for IT-SOFCs
Sihyuk Choi and Guntae Kim*
Journal of Korean Ceramic Society 51, 265-270 (2014)
13. Chemically Stable Perovskite as a Cathode Materials for Solid Oxide Fuel Cells: La doped Ba0.5Sr0.5Co0.8Fe0.2O3-d
Junyoung Kim, Sihyuk Choi, Areum Jun, Hu Young Jeong, Jeeyoung Shin, and Guntae Kim*
ChemSusChem 7, 1669-1675 (2014)
12. Tradeoff optimization of electrochemical performance and thermal expansion for Co-based cathode material for intermediate-temperature solid oxide fuel cells
Seonhye Park, Sihyuk Choi, Jeeyoung Shin*, and Guntae Kim*
Electrochimica Acta 125, 683-690 (2014)
11. A collaborative study of sintering and composite effects for a PrBa0.5Sr0.5Co1.5Fe0.5O5+d IT-SOFC cathode
Seonhye Park, Sihyuk Choi, Jeeyoung Shin, Guntae Kim*
RSC Advances 4, 1775–1781 (2014)
10. Effect of Mn on the electrochemical properties of a layered perovskite NdBa0.5Sr0.5Co2-xMnxO5+d (x = 0, 0.25, and 0.5) for intermediate-temperature solid oxide fuel cells
Jiyoun Kim, Sihyuk Choi, Seonhye Park, Changmin Kim, Jeeyoung Shin, Guntae Kim*
Electrochimica Acta 112, 712-718 (2013)
9. Electrochemical properties of an ordered perovskite LaBaCo2O5+d-Ce0.9Gd0.1O2-d composite cathode with strontium doping for intermediate-temperature solid oxide fuel cells
S. Choi, S. Park, J. Kim, T.-H. Lim, J. Shin and G. Kim*
Electrochemistry Communications 34, 5-8 (2013)
8. Highly efficient and robust cathode materials for low-temperature solid oxide fuel cells: PrBa0.5Sr0.5Co2-xFexO5+d
Sihyuk Choi, Seonyoung Yoo, Jiyoun Kim, Seonhye Park, Areum Jun, Sivaprakash Sengodan, Junyoung Kim, Jeeyoung Shin, Hu Young Jeong, YongMan Choi, Guntae Kim*, and Meilin Liu*
Scientific Reports 3, 2426 (2013)
7. 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
Seonyoung Yoo, Sihyuk Choi, Junyoung Kim, Jeeyoung Shin, and Guntae Kim*
Electrochimica Acta 100, 44-50 (2013)
6. 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
Sihyuk Choi, Jeeyoung Shin, Kang Min Ok, and Guntae Kim*
Electrochimica Acta 81, 217-223 (2012)
5. Strontium Doping Effect on High-Performance PrBa1-xSrxCo2O5+d as a Cathode Material for IT-SOFCs
Seonhye Park, Sihyuk Choi, Junyoung Kim, Jeeyoung Shin, and Guntae Kim*
ECS Electrochemistry Letters 1, F29-F32 (2012)
4. 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
Seonhye Park, Sihyuk Choi, Jeeyoung Shin, and Guntae Kim*
Journal of Power Sources 210, 172-177 (2012)
3. Electrical properties, thermodynamic behavior, and defect analysis of Lan+1NinO3n+1+δ infiltrated into YSZ scaffolds as cathodes for intermediate-temperature SOFCs
Seonyoung Yoo, Sihyuk Choi, Jeeyoung Shin, Meilin Liu, and Guntae Kim*
RSC Advances 2, 4648-4655 (2012)
2. 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
Sihyuk Choi, Jeeyoung Shin, Guntae Kim*
Journal of Power Sources 201, 10-17 (2012)
1. High Performance SOFC Cathode Prepared by Infiltration of Lan+1NinO3n+1 (n = 1, 2, and 3) in Porous YSZ
Sihyuk Choi, Seonyoung Yoo, Jee-Young Shin, Guntae Kim*
Journal of the Electrochemical Society 158 (8), B995-B999 (2011)