GAS DIFFUSION SYSTEM WITH HIGH PURITY
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United States of America Patent
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Issued Date -
Feb 8, 2024
app pub date -
Dec 13, 2021
filing date -
Dec 18, 2020
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Abstract
A method for producing a gas diffusion layer for a fuel cell, including providing a fiber composition which includes carbon fibers and/or precursors of carbon fibers and subjecting the fiber composition to a method for producing a fibrous web. The method further includes consolidating the fibrous web by exposure to aqueous fluid jets to form a nonwoven, water used by the aqueous fluid jets having a conductivity of at most 250 microsiemens/cm at 25° C. If the fiber composition includes precursors of carbon fibers, the nonwoven is subjected to pyrolysis at a temperature of at least 1000° C.
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