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J. Korean Ceram. Soc. > Volume 51(4); 2014 > Article
Journal of the Korean Ceramic Society 2014;51(4): 271.
doi: https://doi.org/10.4191/kcers.2014.51.4.271
BaCeO3-BaZrO3 고용체(BCZY) 기반 프로톤 세라믹 연료전지(PCFC)용 고성능 전해질 개발
안혁순, 신동욱, 최성민, 이종호, 손지원, 김병국, 제해준, 이해원, 윤경중
한국과학기술연구원 고온에너지 재료연구센터
BaCeO3-BaZrO3 Solid Solution (BCZY) as a High Performance Electrolyte of Protonic Ceramic Fuel Cells (PCFCs)
Hyegsoon An, Dongwook Shin, Sung Min Choi, Jong-Ho Lee, Ji-Won Son, Byung-Kook Kim, Hae June Je, Hae-Weon Lee, Kyung Joong Yoon
High-Temperature Energy Materials Center, Korea Institute of Science and Technology
To overcome the limitations of the solid oxide fuel cells (SOFCs) due to the high temperature operation, there has been increasing interest in proton conducting fuel cells (PCFCs) for reduction of the operating temperature to the intermediate temperature range. In present work, the perovskite $BaCe_{0.85-x}Zr_xY_{0.15}O_{3-delta}$ (BCZY, x = 0.1, 0.3, 0.5, and 0.7) were synthesized via solid state reaction (SSR) and adopted as an electrolyte materials for PCFCs. Powder characteristics were examined using X-ray diffraction (XRD), thermogravimetric analysis (TGA) and Brunauer, Emmett and Teller (BET) surface area analysis. Single phase BCZY were obtained in all compositions, and chemical stability was improved with increasing Zr content. Anode-supported cell with $Ni-BaCe_{0.55}Z_{0.3}Y_{0.15}O_{3-delta}$ (BCZY3) anode, BCZY3 electrolyte and BCZY3-$Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-delta}$ (BSCF) composite cathode was fabricated and electrochemically characterized. Open-circuit voltage (OCV) was 1.05 V, and peak power density of 370 ($mW/cm^2$) was achieved at $650^{circ}C$.
Key words: Proton conductor, Fuel cell, Electrolyte, BZCY, Stability
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