Coating processes – Electrical product produced – Fuel cell part
Patent
1998-04-10
2000-06-13
Nuzzolillo, Maria
Coating processes
Electrical product produced
Fuel cell part
429 40, B05D 512, H01M 800
Patent
active
060746920
ABSTRACT:
A method of making a membrane-electrode-assembly (MEA) for a PEM/SPE fuel cell comprising applying a slurry of electrode-forming material directly onto a membrane-electrolyte film. The slurry comprises a liquid vehicle carrying catalyst particles and a binder for the catalyst particles. The membrane-electrolyte is preswollen by contact with the vehicle before the electrode-forming slurry is applied to the membrane-electrolyte. The swollen membrane-electrolyte is constrained against shrinking in the "x" and "y" directions during drying. Following assembly of the fuel cell, the MEA is rehydrated inside the fuel cell such that it swells in the "z" direction for enhanced electrical contact with contiguous electrically conductive components of the fuel cell.
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General Motors Corporation
Nuzzolillo Maria
Plant Lawrence B.
Tsang Susy
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