GAS DIFFUSION LAYER AND PREPARATION METHOD THEREFOR
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United States of America
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Nov 21, 2024
app pub date -
Sep 5, 2022
filing date -
Sep 5, 2022
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Disclosed are a gas diffusion layer and a preparation method therefor, which comprises the following steps: S1: providing elongated recesses in parallel on a side surface of a metal sheet; S2: cutting the metal sheet provided with the elongated recesses into a desired shape; S3: stacking a plurality of cut metal sheets such that adjacent metal sheets are tightly attached and firmly connected to form a metal block having regular pore structures; and S4: cutting the metal block along a cross section of the metal block, where the cutting thickness matches the thickness of the desired gas diffusion layer, and a cut sheet structure with micropores being regularly distributed on the surface is used as the gas diffusion layer. The present invention can solve the problems that titanium fiber felts in the prior art have poor diversion performance, low contact efficiency and large contact surface resistance.
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