Conductivity recovery by redox cycling of yttrium doped barium zirconate proton conductors and exsolution of Ni-based sintering additives

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• 作者：Narendar Nasani^a ; ^{narendar.nasani@ua.pt} ; D. Pukazhselvan^a ; Andrei V. Kovalevsky^b ; Aliaksandr L. Shaula^a ; Duncan P. Fagg^a
• 关键词：Yttrium doped barium zirconate ; Nickel ; Sintering additive ; Protonic ceramic fuel cells ; Electrolyte
• 刊名：Journal of Power Sources
• 出版年：2017
• 出版时间：30 January 2017
• 年：2017
• 卷：339
• 期：Complete
• 页码：93-102
• 全文大小：2173 K
• 卷排序：339

文摘

Highly dense (>95%) yttrium doped BaZrO3 was obtained <1450 °C using Ni sintering additives. Higher grain growth was observed in BZY with BaNiOx sintering additive. Upon redox cycling, the total conductivity of NiO added BZY was higher than pristine BZY. The impaired bulk proton conductivity was inverted through Ni-exsolution.