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US 3,943,006 AGranted
Method of making a fuel cell electrode
AssigneeEnergy Research Corporation
InventorsBernard Baker, Martin Klein
Life of this patent
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Abstract
Electrode structures for fuel cells are made by blending noble metal black, dry polytetrafluoroethylene and a soluble bulking agent in a liquid, filtering liquid from the blend and rolling the remnant to form a sheet of fibrillated polytetrafluoroethylene containing noble metal black and bulking agent. The bulking agent may be leached from the sheet and the sheet then pressed or the sheet may be first pressed and the bulking agent then leached from the sheet.
Claims11
A method for use in producing electrode structure for fuel cells comprising the steps of:
- a. blending particles of noble metal black, particles of dry polytetrafluoroethylene and particles of a soluble bulking agent in a liquid in which said bulking agent is insoluble, said polytetrafluoroethylene constituting at least 10 percent of the combined weight of said noble metal black and said polytetrafluoroethylene;
- b. filtering liquid from said blend to form a filtered mixture;
- c. subjecting said filtered mixture to rolling forces to form a sheet of fibrillated polytetrafluoroethylene containing noble metal black and bulking agent;
- and
- d. removing the remainder of said liquid from said sheet.
2 more elements
Dependencies are inferred from the claim text.