低温共烧结制备阳极支撑型固体氧化物燃料电池

Low temperature fabrication of anode-supported solid oxide fuel cell by co-fire process

通过机械球磨及添加烧结助剂的方法调节阳极支撑体的烧结收缩性能,实现低温共烧结法制备阳极支撑型固体氧化物燃料电池。采用粒径分析仪表征球磨对阳极粉体粒径的影响,采用尺寸收缩法测定不同预处理阳极粉体的烧结性能,采用电化学表征评估单电池的性能。结果表明:采用硬质内衬球磨罐球磨可以更加有效地减小阳极粉料的粒径,改善阳极支撑体的烧结性能。高的阳极支撑体烧结收缩满足了共烧电解质层的致密化需求,使得1 250℃低温共烧结制备的单电池800℃时的开路电压达到了1.0 V以上,接近理论开路电压。

Ball-milling and adding sintering additive were adopted to adjust the sintering shrinkage of anode support in order that the anode-support solid oxide fuel cells（ SOFCs） were able to be fabricated by co-sintering at low temperature.Particle size analyzer was used to characterize the effect of ball milling on the particle of the anode powders.Size shrinkage method was used to determine the influence of the different pretreatment of anode powders on the sintering properties.The performance of the single cell was evaluated by electrochemical characterization.Results showed that ball milling using nylon tank with hard liner could effectively decrease the particle size of the anode powders,and improve the sintering performance of the anode support.The open circuit voltage of the single cell co-sintered at low temperature1 250 ℃ was above 1.0 V tested at 800 ℃ with humidified H2 as fuel and air as oxidant,which was close to the theoretical value.