潮湿环境下燃料电池性能的稳定性研究

Research on Stability of Fuel Cell Performance under Humidity Circumstance

研究了空气湿度,即:空气中的水蒸气含量对于固体氧化物燃料电池阴极性能的影响。选取有代表性的阴极材料(La0.8Sr0.2)0.98Mn O3-"(LSM)作为研究对象,通过测试单电池(Ni O/Sc SZ/LSM)在800oC的工作温度下连续工作1000h的电池电压降,以及阴极电压衰减来表征电池性能的变化(电流密度200 m Acm-2)。结果表明,随着空气中水蒸气浓度的升高,电池性能出现严重衰减,并伴随着阴极材料的表面出现了析出物。

The influence of water vapor content in air on SOFC cathode performance is discussed in this paper. Representative cathode material（La0.8 Sr0.2）0.98 Mn O3-＂（LSM） is selected as an object of study,and cell performance degradation of single cell（Ni O/Sc SZ/LSM） under 800 oC for 1000 hours and cathodic voltage degradation are measured to characterize the changes of cell performance（current density of 200 m Acm-2）. The results show that cell performance degradation is serious accompanied with high humidity,which may be deduced to precipitates on the surface of cathode material.