Effect of Co doping on sinterability and protonic conductivity of BaZr0.1Ce0.7Y0.1Yb0.1O3?? for protonic ceramic fuel cells
By Wan, Yanhong; He, Beibei; Wang, Ranran; Ling, Yihan; Zhao, Ling
Published in Journal of Power Sources
NULL
2017
Abstract
Abstract During the application of protonic ceramic fuel cells (PCFCs), Co species derived from Co-containing cathodes readily diffuse into electrolyte layer. In this study, the influence of cobalt doping on the sintering and protonic conducting properties of BaZr0.1Ce0.7Y0.1Yb0.1O3?? (BZCYYb) electrolytes is evaluated. The Co-doped {BZCYYb} oxides prepared by a sol-gel way exhibit the orthorhombic perovskite structure. A trade-off relation between the sinterability and protonic conductivity of Co doped {BZCYYb} oxides is identified. Furthermore, BaZr0.1Ce0.68Y0.1Yb0.1Co0.02O3?? (BZCYYbC2) with a compromise between sinterability and protonic conductivity is further applied as electrolyte of a single cell. The single cell with {BZCYYbC2} electrolyte demonstrates a competitive power density of 0.67 W cm?2 at 700
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