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研究了不同还原条件下制备的固体氧化物燃料电池Ni-YSZ支撑阳极的性能变化规律。结果表明:600℃以下还原时,阳极的微观结构较差,Ni颗粒较易团聚,对应的抗弯强度在恒温和升温还原时分别为4.32和14.31 MPa;600℃及以上还原时,阳极的微观结构均匀一致,Ni颗粒分布均匀,对应的抗弯强度在恒温和升温还原时分别高达14.92和56.63 MPa。恒温和升温还原时,支撑阳极的孔隙率随着还原温度的升高均先增大后减小,其中恒温还原在700℃达到最大,升温还原在400℃达到最大。从支撑阳极综合特性判断,无论恒温还原还是升温还原,Ni O-YSZ阳极支撑电池的最佳还原温度以不低于600℃为佳。
Abstract：The properties of support-anode of Ni-YSZ reduced at isothermal and increasing temperatures were investigated. The results show that at < 600 ℃, the anodes exhibit the Ni agglomeration, the non-uniform microstructure and low bending strengths of 4.32 and 14.31 MPa when the reductions at isothermal and increasing temperatures occur, respectively. However, at >600 ℃, the anodes show the uniform microstructure, proper mechanical strengths of 14.92 and 56.63 MPa when the reductions at isothermal and increasing temperatures occur, respectively. The porosities of supported-anode firstly increase and then decrease with increasing the reduction temperature, and its maximum values appear at 700 and 400 ℃ for the reductions at isothermal and rising temperatures, respectively. Therefore, for both the reduction processes, the optimized reduction temperature for Ni-YSZ anode-supported SOFCs is not lower than 600 ℃.
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基本信息:
DOI：10.14062/j.issn.0454-5648.2015.05.14
中图分类号:TM911.4
引用信息:
[1]汪峰,缪馥星,官万兵.不同还原条件下制备的固体氧化物燃料电池支撑阳极Ni-YSZ的性能[J],2015,43(05):650-656.DOI:10.14062/j.issn.0454-5648.2015.05.14.
基金信息:
国家自然科学基金(11302109)项目