Bismuth and indium co-doping strategy for developing stable and efficient barium zirconate-based proton conductors for high-performance H-SOFCs

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• 作者：Yihan Ling^a ; ^b ; Hui Chen^a ; Jinan Niu^a ; Fang Wang^b ; Ling Zhao^c ; ; Xuemei Ou^a ; ^{lyhyy@mail.ustc.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Takashi Nakamura^b ; Koji Amezawa^b
• 关键词：High-temperature proton conductor ; Sinterability ; Protonic defect ; Proton conducting solid oxide fuel cells
• 刊名：Journal of the European Ceramic Society
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：36
• 期：14
• 页码：3423-3431
• 全文大小：2307 K

文摘

High-temperature proton conductors gained ever-increasing interest as electrolyte materials alternative to oxygen-ion conductors due to their high conductivity associated with low activation energy at reduced temperatures. In this study, we reported our findings on chemically stable, easily sintered and highly proton-conductive BaZrO₃ oxides with Bi₂O₃ and In₂O₃ co-addition as electrolyte materials for proton conducting solid oxide fuel cells (H-SOFCs). Among the composition series, BaZr_0.75In_0.2Bi_0.05O_3−δ (BZIB5) exhibited the improved sinterability and good conductivity. Correspondingly, high-temperature gravimetry results indicated that the concentrations of protonic defect and oxygen vacancy strongly depended on P(H₂O) and temperature rather than P(O₂). Importantly, single cells with 12-μm-dense BZIB5 electrolyte films were successfully fabricated, and achieved high performance with the maximum power density of 0.34 Wcm⁻² at 700 °C. The encouraging results demonstrated that BZIB5 is a promising candidate as the electrolyte material for high performance H-SOFCs.