Gas diffusion electrode for membrane fuel cells and method of it

Details Gas diffusion electrode for membrane fuel cells and method of it Gas diffusion electrode for membrane fuel cells and method of it

1997-03-24

1999-01-19

Bell, Bruce F.

Chemistry: electrical current producing apparatus, product, and

Having earth feature

429 40, 429 41, 429 44, 204282, 204283, 204284, 204296, 521 27, 521 28, 106 122, 106122, 502 4, 502 22, 502 27, 502101, H01M 486

Patent

active

058612220

ABSTRACT:
A porous gas diffusion electrode for membrane fuel cells on an ion-conducting polymer. The electrode contains a finely divided electrocatalyst which is dispersed in a proton-conducting ionomer and has a total porosity of more than 40 to less than 75%. It supplies considerably improved performance data in comparison to known electrodes. The electrode can be produced by using pore-forming materials which are dissolved during the re-protonation of the ion-conducting polymers with sulfuric acid or are decomposed by the action of temperature.

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patent: 5316871 (1994-05-01), Swathirajan et al.
patent: 5489563 (1996-02-01), Brand et al.
patent: 5523177 (1996-06-01), Kosek et al.

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