流延成型法制备高性能阳极支撑固体氧化物燃料电池

High-Performance Anode-Supported Solid Oxide Fuel Cells Prepared by Tape Casting Technique

开发高性能的阳极支撑固体氧化物燃料电池(SOFC)有助于实现其低温化,而电池的制备工艺及结构参数对电池的性能影响显著。流延成型法是一种廉价且可以实现批量生产的电池制备方法。采用流延成型法制备阳极支撑SOFC,并研究阳极支撑体造孔剂种类、阳极功能层的厚度及孔隙度、电解质厚度等因素对电池性能的影响。当使用PMMA作为阳极支撑体造孔剂、阳极功能层厚度约12μm且功能层内不添加造孔剂时,阳极结构最好;减少电解质厚度能显著地降低Ohmic阻抗,但电解质过薄也会导致电解质的强度不够,影响电池的稳定运行。采用优选的阳极结构、电解质厚度为8μm的阳极支撑SOFC在800℃的最大功率密度达到1.2 W·cm^(-2)。

The development of high-performance anode-supported solid oxide fuel cells(SOFCs)contributes to reducing the working temperature of SOFCs,and the preparation process and structural parameters of cells have a significant impact on the performance.Tape casting is a cheap and mass-produced cell fabrication method.In this paper,anode-supported SOFCs were prepared by a tape casting technique.The effects of pore-former type in anode support,the thickness and porosity of the anode functional layer and the thickness of the electrolyte on the SOFC performances were investigated.An anode functional layer with the thickness of about 12μm was prepared when PMMA was used as a pore-former of the anode support,thus obtaining a preferred anode structure.Reducing the thickness of the electrolyte can reduce the ohmic resistance,but a too thin electrolyte can lead to the insufficient strength of electrolyte,affecting the stable operation of SOFCs.An anode-supported SOFC with the optimized anode and an electrolyte thickness of 8μm has a peak power density of 1.2 W·cm^(-2) at 800℃.