Title: Surface engineering of bipolar plate materials for better water management
Application Number: 200610170002 Application Date: 2006.12.20
Publication Number: 1988233 Publication Date: 2007.06.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H01M8/02;H01M4/86;H01M8/24;H01M4/88;B60L11/18
Applicant(s) Name: GM Global Technology Operation Address:
Inventor(s) Name: Vyas Gayatri;Elhamid Mahmoud H. A.;Mikhail Youssef
Attorney & Agent: caimin jun liaoling ling
Abstract:
    A flow field plate or bipolar plate for a fuel cell, where a surface of the flow field plate is textured or roughened to change the surface morphology of the plate. A conductive coating is deposited on the roughened surface where the roughness of the surface of the plate increases the hydrophilic nature of the coating. Therefore, if the coating is naturally hydrophobic, the surface roughness makes the coating hydrophilic to wick water away. If the coating is a conductive hydrophilic coating, then the surface roughness makes the coating super-hydrophilic, and may counter the effects of surface contamination that would act to make the hydrophilic coating less hydrophilic.
Time: 13
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