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J. Korean Ceram. Soc. > Volume 58(3); 2021 > Article
Journal of the Korean Ceramic Society 2021;58(3): 351-358.
doi: https://doi.org/10.1007/s43207-021-00109-5
PrBa0.5Sr0.5Co1.5Fe0.5O5+δ composite cathode in protonic ceramic fuel cells
Seunghyeok Im1,2, Jong-Ho Lee1,2, Ho-Il Ji1,2
1Center for Energy Materials Research, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
2Nanomaterials Science and Engineering , Korea University of Science and Technology (UST), KIST Campus, Seoul 02792, Republic of Korea
Correspondence  Ho-Il Ji ,Email: hiji@kist.re.kr
Received: December 19, 2020; Revised: January 19, 2021   Accepted: January 23, 2021.  Published online: May 31, 2021.
The need for high performance of protonic ceramic fuel cells (PCFCs) has created significant interest in highly active cathode materials. Since a major charge carrier in PCFCs is proton, the use of triple conducting oxide (TCO) materials, in which oxygen ion, hole, and proton can be transported, is expected to improve the electrochemical performance of PCFCs. In this study, the applicability of PrBa0.5Sr0.5Co1.5Fe0.5O5+δ (PBSCF) cathode, known as TCO material, in PCFCs is investigated. The chemical compatibility of PBSCF with BaCe0.55Zr0.3Y0.15O3–δ (BCZY3) proton-conducting electrolyte at high temperature is examined by XRD. To improve the interfacial structure between BCZY3 electrolyte and single-phase PBSCF cathode, PBSCF-BCZY3 composite layer is inserted between both layers. The optimization of sintering temperature and thickness of cathode results in the successful fabrication of PCFCs, exhibiting low ohmic resistance and high electrochemical performance.
Key words: Protonic ceramic fuel cells · Cathode · Triple conducting oxide (TCO) · Microwave sintering
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