Modified carbon products, their use in fluid/gas diffusion layers and similar devices and methods relating to the same
First Claim
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1. A fuel cell, comprising an anode, a cathode and a proton exchange membrane disposed between said anode and said cathode, and further comprising a first gas/fluid diffusion layer adjacent to said anode and opposite said proton exchange membrane and a second gas/fluid diffusion layer adjacent to said cathode and opposite said proton exchange membrane, wherein at least one of said first and second gas diffusion layers comprises a modified carbon product.
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Abstract
Gas/Fluid diffusion layers incorporating modified carbon products. The modified carbon products advantageously enhance the properties of gas/fluid diffusion layers, leading to more efficiency within a fuel cell or similar device incorporating the gas/fluid diffusion layer.
98 Citations
32 Claims
- 1. A fuel cell, comprising an anode, a cathode and a proton exchange membrane disposed between said anode and said cathode, and further comprising a first gas/fluid diffusion layer adjacent to said anode and opposite said proton exchange membrane and a second gas/fluid diffusion layer adjacent to said cathode and opposite said proton exchange membrane, wherein at least one of said first and second gas diffusion layers comprises a modified carbon product.
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23. A method for the fabrication of a gas diffusion layer in fuel cell, comprising the steps of:
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a) providing a carbon support;
b) depositing a first ink composition comprising a first modified carbon product on said carbon support to form a first sublayer; and
c) depositing a second ink composition comprising a second modified carbon product over said first sublayer, wherein said first modified carbon product and said second modified carbon product have different hydrophilic properties. - View Dependent Claims (24, 25, 26, 27)
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28. A method for the fabrication of a gas diffusion layer, comprising the steps of:
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a) providing a carbon support; and
b) contacting said carbon support with a diazonium salt; and
c) treating said diazonium salt to covalently bond a functional group to said carbon support and form a modified carbon support product. - View Dependent Claims (29, 30, 31, 32)
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Specification