Solid polymer fuel cell

Details Solid polymer fuel cell Solid polymer fuel cell

2006-04-04

2006-04-04

Crepeau, Jonathan (Department: 1746)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S047000, C429S047000

Reexamination Certificate

active

07022426

ABSTRACT:
A solid polymer fuel cell includes an electrolyte membrane having a polymer ion-exchange component, and an air electrode and a fuel electrode between which the electrolyte membrane is sandwiched. Each of the air electrode and the fuel electrode can be formed of a polymer ion-exchange component and a plurality of catalyst particles including a catalyst metal carried on surfaces of carbon black particles, and includes no third component. When a moistening for maintaining the electrolyte membrane in a wet state is carried out from both of the side of the air electrode and the side of the fuel electrode, the carbon black particles have a water-repellent property such that an amount A of water adsorbed under a saturated steam pressure at 60° C. is equal to or smaller than 80 cc/g, and a ratio Wp/Wc of a weight Wp of polymer ion-exchange component incorporated to a weight Wc of carbon black particles incorporated is set in a range of 0.4≦Wp/Wc≦1.25.

REFERENCES:
patent: 5453332 (1995-09-01), Sakairi et al.
patent: 6280871 (2001-08-01), Tosco et al.
patent: 6355149 (2002-03-01), Soczka-Guth et al.
patent: 6376110 (2002-04-01), Koschany

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