气体扩散层压缩形变对 PEM 燃料电池性能影响分析

The gas diffusion layer(GDL)of proton exchange membrane(PEM)fuel cell was taken as the research object,and a spherical catalyst cluster model considering the complex structure of the catalyst layer was established based on Comsol. The relationship between GDL deformation and performance was investigated by numerical simulation and experimental verification. The results show that when the packaging load is less than 0.6 MPa,the positive effect of contact resistance reduction on the battery is dominant,and the maximum error between the contact resistance calculated value and the experimental value is 1.7%,which meets the accuracy requirements. When the encapsulation force is large,the negative effect caused by the decrease of GDL porosity is dominant,and the encapsulation load has a great influence on the distribution of liquid water saturation. When the GDL shape variable is 27.2%,the battery output power is maximum.