Gradient Diffusion Layer Degradation Based on Lattice Boltzmann Method
This study employed a random algorithm to reconstruct the two-dimensional microstructure of gradient gas diffusion layers with varying degrees of aging.Subsequently,the multiphase pseudo-potential lattice Boltzmann method was utilized to investigate the transport behavior of liquid water in gradient-designed diffusion layers with varying degrees of degradation.The results indicate that as the degradation of the diffusion layer intensifies,the drainage performance significantly decreases,and a considerable amount of liquid water remains in the diffusion layer.In addition,the gradient-designed diffusion layer initially distributes more polytetrafluoroethylene in the inlet area,enhancing water management within the diffusion layer.At the same time,after aging,the diffusion layer exhibits higher capillary pressure to control the water-driving area and shows higher drainage and anti-aging performance.This study provides a research basis and design for making diffusion layers with high aging resistance and drainage performance.
gas diffusion layerlattice Boltzmann methodagingdrainage performance
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