BiVO_(4)的添加对Nd_(0.2)Ce_(0.8)O_(1.9)电解质微观结构和性能的影响

Effects of BiVO_(4) Doping on Microstructure and Performance of Nd_(0.2)Ce_(0.8)O_(1.9) Electrolytes

采用溶胶凝胶法制备BiVO_(4)(BV)和Nd_(0.2)Ce_(0.8)O_(1.9)(NDC)粉末,研究BV的加入对NDC电解质结构、形貌及电性能的影响。实验结果表明,NDC-5BV电解质的微观结构更致密,700℃时总电导率(σ_(t))提高至3.35×10^(-2) S·cm^(-1),极化电阻(Rp)降低34%以上。单电池在700℃时的最大功率密度(MPD)为514 mW·cm^(-2),开路电压(OCV)在70 h内可以保持良好的长期稳定性。

Sol-gel method was applied to prepare BiVO_(4)(BV)and Nd_(0.2)Ce_(0.8)O_(1.9)(NDC)powders.The effects of BV doping on microstructure,morphology and electrical properties of NDC electrolyte were studied.The results of experiments revealed that Nd_(0.2)Ce_(0.8)O_(1.9) electrolyte showed a highly dense microstructure.At 700℃,the total con-ductivity(σt)of NDC-5BV electrolyte was 3.35×10^(-2) S·cm^(-1).The polarization resistance(Rp)was reduced by more than 34%at 700℃.The maximum power density(MPD)of the single cell reached up to 514 mW·cm^(-2) at 700℃.During the operation time for 70 h,the open circuit voltage(OCV)can be maintained good stability.