Fuel cells comprising moldable gaskets, and methods of making
AssigneeGM Global Technology Operations LLC
InventorsMahmoud H. Abd Elhamid, Youssef M. Mikhail, Daniel J. Lisi, Gayatri Vyas
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Abstract
Devices comprising an electrochemical conversion assembly comprise a plurality of electrochemical conversion cells, and a plurality of electrically conductive bipolar plates, wherein the electrochemical conversion cells are disposed between the adjacent bipolar plates. The electrochemical conversion assembly further comprises a plurality of conversion assembly gaskets, wherein the respective conversion assembly gaskets are molded onto corresponding ones of the plurality of bipolar plates. The conversion assembly gaskets comprise a mixture including polyvinylidene fluoride (PVDF).
Claims20
A method of fabricating an electrochemical conversion assembly comprising:
- providing a plurality of electrochemical conversion cells and a plurality of electrically conductive bipolar plates;
- dissolving polyvinylidene fluoride (PVDF) in at least one carbonate-based solvent forming a mixture consisting essentially of PVDF and the at least one carbonate-based solvent;
- injection molding the mixture onto the plurality of bipolar plates;
- and
- heating the mixture under pressure at a temperature and duration sufficient to form a plurality of conversion assembly gaskets consisting essentially of PVDF on the plurality of bipolar plates.
A method of fabricating an electrochemical conversion assembly comprising:
- providing a plurality of electrochemical conversion cells comprising electrode membrane assemblies, and a plurality of electrically conductive bipolar plates;
- dissolving polyvinylidene fluoride (PVDF) in at least one carbonate-based solvent forming a mixture consisting essentially of PVDF and the at least one carbonate-based solvent;
- injection molding the mixture onto the membrane electrode assemblies;
- and
- heating the mixture under pressure at a temperature and duration sufficient to form a plurality of conversion assembly gaskets consisting essentially of PVDF on the membrane electrode assemblies.
Dependencies are inferred from the claim text.