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Description
The Gas Diffusion Layer (GDL) is a critical component that ensures the efficient operation of proton exchange membrane fuel cells, capable of accommodating deformations and pressure differences between cell components. This study proposes a combined method of finite element and stochasticlly reconstruction method for GDL, calculating the stress and stress uniformity inside GDL microstructure under different compression ratios. Finally, an optimization analysis is conducted using orthogonal design method, and new stress prediction expressions are proposed. The results indicates that, fiber diameter and porosity are more sensitive. The new developped expressions are validated, which can predict and optimize the combined effects of different microstructure parameters on mechanical performance accurately. The results of this study provide predictions and guidance for designing low-stress and high-performance GDL.
| Country | China |
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