固体氧化物燃料电池集流层厚度优化

Optimization of current collector layer thickness for electrolyte-supported solid oxide fuel cell

针对电解质支撑固体氧化物燃料电池（SOFC）,建立了一个较为全面的二维数学模型,考虑了相互依存的离子导电过程、电子导电过程以及气体输运过程,研究了孔隙率和电极集流层厚度对电池性能的影响。结果表明：电池的输出电流密度强烈依赖于电极集流层厚度,合适的阳极集流层厚度应在20～60μm,合适的阴极集流层厚度应在250～300μm。

A comprehensive two-dimension mathematical model for the electrolyte-supported solid oxide fuel cell（SOFC） was established,considering the interdependency of ionic conduction,electronic conduction and gas transport processes.The effect of porosity and electrode current collector layer thickness on the cell performance was investigated.The results show that the output current density depends strongly on the electrode current collector layer thickness.The suitable anode current collector layer thickness should be between 20-60 μm,and the suitable cathode current collector layer thickness should be between 250-300 μm.