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  

Properties of Supported-Anode Ni-YSZ for Planar Solid Oxide Fuel Cell Prepared by Different Reduction Processes

作　　者：汪峰[1] 缪馥星[2] 官万兵[1] 

机构地区：[1]中国科学院宁波工业技术研究院,浙江宁波315201 [2]宁波大学机械工程与力学学院,浙江宁波315201

出　　处：《硅酸盐学报》2015年第5期650-656,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(11302109)项目

摘　　要：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。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 ℃.

关 键 词：支撑阳极 镍-氧化钇稳定的氧化锆 还原温度 微观结构 孔隙率 力学性能 

分 类 号：TM911.4[电气工程—电力电子与电力传动]