Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Electrochemical Evaluation of Mixed Ionic and Electronic Conductor-Proton Conducting Oxide Composite Cathode for Protonic Ceramic Fuel Cells

혼합 이온 및 전자 전도체-프로톤 전도성 전해질 복합 공기극을 적용한 프로토닉 세라믹 연료전지의 전기화학적 성능 평가

  • HYEONGSIK SHIN (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • JINWOO LEE (Department of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • SIHYUK CHOI (Department of Mechanical Engineering, Kumoh National Institute of Technology)
  • 신형식 (국립금오공과대학교 기계공학과) ;
  • 이진우 (국립금오공과대학교 기계공학과) ;
  • 최시혁 (국립금오공과대학교 기계공학과)
  • Received : 2023.12.13
  • Accepted : 2024.02.05
  • Published : 2024.02.28
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Abstract

The electrochemically active site of mixed ionic and electronic conductor (MIEC) as a cathode material is restricted to the triple phase boundary in protonic ceramic fuel cells (PCFCs) due to the insufficient of proton-conducting properties of MIEC. This study primarily focused on expanding the electrochemically active site by La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF6428)-BaZr0.4Ce0.4Y0.1Yb0.1O3-δ (BZCYYb4411) composite cathode. The electrochemical properties of the composite cathode were evaluated using anode-supported PCFC single cells. In comparison to the LSCF6428 cathode, the peak power density of the LSCF6428-BZCYYb4411 composite cathode is much enhanced by the reduction in both ohmic and non-ohmic resistance, possibly due to the increased electrochemically active site.

Keywords

Acknowledgement

이 연구는 금오공과대학교 대학 학술연구비로 지원되었습니다(202103770001).

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