A reduced temperature solid oxide fuel cell with three-dimensionally ordered macroporous cathode

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• 作者：Bo Liang^a ; ^{basafan@gmail.com} ; ^{boliang-riyou@aist.go.jp} ; Toshio Suzuki^a ; Koichi Hamamoto^a ; Toshiaki Yamaguchi^a ; Hirofumi Sumi^a ; Yoshinobu Fujishiro^a ; Brian J. Ingram^b ; John David Carter^b
• 关键词：Micro tubular ; Solid oxide fuel cell ; Macroporous cathode ; Triple-phase boundary
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：15 August, 2012
• 卷：212
• 期：Complete
• 页码：86-92
• 文件大小：1704 K

摘要

Three-dimensionally ordered macroporous cathode was fabricated for a zirconia based micro-tubular solid oxide fuel cells (SOFCs). Three different cathodes (cathode A, no pore former; cathode B, with pore former (1.5聽渭m in diameter); cathode C, with pore former (0.8聽渭m in diameter)) were compared to investigate how the microstructure of it affected the cell performance at various operating temperatures. Micro-sized pores were well distributed within cathode B and C. The total porosity of cathode A is 35%, while it respectively reached 42 and 50%for cathodes B and C. At the same time, the specific surface area of them was 28.8 and 52.0%larger than that of the cathode A. As a result, the peak power density of the zirconia based cell, with cathode C, was 0.25 and 0.56聽W聽cm^鈭? at 550 and 600聽掳C, while the respective value was just 0.11 and 0.30聽W聽cm^鈭? for the cell with cathode A. Thus, optimizing microstructure of cathode should be one of the best approaches for lowering the operating temperature for SOFCs.