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J. Korean Ceram. Soc. > Volume 61(2); 2024 > Article
Journal of the Korean Ceramic Society 2024;61(2): 224-249.
doi: https://doi.org/10.1007/s43207-023-00360-y
Recent progress in oxygen electrodes for protonic ceramic electrochemical cells
Seeun Oh1, Hyeonggeun Kim1, Incheol Jeong2, Dongyeon Kim1, Hyeongmin Yu1, Kang Taek Lee1,3
1Department of Mechanical Engineering, KAIST, Daejeon, 34141, Republic of Korea
2Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, 34132, Republic of Korea
3KAIST Graduate School of Green Growth and Sustainability, Daejeon, 34141, Republic of Korea
Correspondence  Kang Taek Lee ,Email: leekt@kaist.ac.kr
Received: September 20, 2023; Revised: November 21, 2023   Accepted: December 6, 2023.  Published online: January 25, 2024.
*Seeun Oh and Hyeonggeun Kim contributed equally to this work.
Protonic ceramic electrochemical cells, a promising technology for energy conversion and storage, have garnered significant interest in recent years owing to their superior low-temperature (<600 °C) performance relative to solid oxide electrochemical cells. However, the sluggish kinetics of oxygen electrodes have impeded further advancements. Despite considerable research efforts, the development of practically applicable oxygen electrodes remains challenging. We herein review the recent research focusing on the fundamental understanding and development of oxygen electrode materials. Furthermore, we provide a range of material design strategies for enhancing the catalytic activity of oxygen electrodes along with a concise overview of potential derivative applications. Finally, the perspectives and potential directions for the development of oxygen electrodes for high-performance protonic ceramic electrochemical cells are presented.
Key words: Proton ceramic electrochemical cells · Oxygen electrodes · Triple-conducting oxides · Fuel cells · Electrolysis
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