A chemically stable electrolyte with a novel sandwiched structure for proton-conducting solid oxide fuel cells (SOFCs)

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• 作者：Lei Bi ; Enrico Traversa
• 关键词：BaCeO3&ndash ; BaZrO3 ; Chemical stability ; Proton conductor ; Sandwiched electrolyte ; SOFC
• 刊名：Electrochemistry Communications
• 出版年：November, 2013
• 年：2013
• 卷：36
• 期：Complete
• 页码：42-45
• 全文大小：773 K

文摘

A chemically stable electrolyte structure was developed for proton-conducting SOFCs by using two layers of stable BaZr_0.7Pr_0.1Y_0.2O_{3 鈭?em>未} to sandwich a highly-conductive but unstable BaCe_0.8Y_0.2O_{3 鈭?em>未} electrolyte layer. The sandwiched electrolyte structure showed good chemical stability in both CO₂ and H₂O atmosphere, indicating that the BZPY layers effectively protect the inner BCY electrolyte, while the BCY electrolyte alone decomposed completely under the same conditions. Fuel cell prototypes fabricated with the sandwiched electrolyte achieved a relatively high performance of 185 mW cm^鈭?#xA0;2 at 700 掳C, with a high electrolyte film conductivity of 4 脳 10^鈭?#xA0;3 S cm^鈭?#xA0;1 at 600 掳C.