Solid polymer type fuel cell and method for manufacturing the sa

Details Solid polymer type fuel cell and method for manufacturing the sa Solid polymer type fuel cell and method for manufacturing the sa

1994-06-27

1995-12-12

Willis, Jr., Prince

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 30, 429 34, 429 42, 296235, H01M 810

Patent

active

054748577

ABSTRACT:
The invention provides a solid polymer electrolyte having high performances in which the reaction area of electrode is increased by uniformly dispersing and bonding a solid polymer electrolyte and a catalyst and the ability of gas feeding to the reaction site is improved by adding a fluoropolymer so that the catalyst is not excessively coated. A method for making the fuel cell is also provided. The electrode provided on at least one side of a solid polymer electrolyte membrane is formed by coating on one side of a gas-diffusible layer a mixed dispersion of a noble metal catalyst, a carbon fine powder and a colloidal dispersion of a solid polymer electrolyte, the colloidal dispersion being prepared using an organic solvent having a polar group other than hydroxyl group in the molecule and having a carbon chain of 1-8 carbon atoms which bonds to the polar group or having a dielectric constant of 3-10.

REFERENCES:
patent: 5211984 (1993-05-01), Wilson
patent: 5272017 (1993-12-01), Swathirajan et al.
patent: 5330860 (1994-07-01), Grot et al.
Patent Abstracts of Japan, vol. 16, No. 134 (E-1185) 6 Apr. 1992 JP-A-03 295 172 (MITSUBISHI HEAVY IND LTD0 26 Dec. 1991.
Patent Abstracts of Japan, vol. 15, no. 438 (E-1130) 8 Nov. 1991 & JP-A-03 184 266 (TOSHIBA CORP. 12 Aug. 1991.
Patent Abstracts of Japan, vol. 17, No. 319 (E-1383) 17 Jun. 1993 & JP-A-05 036 418 (FUJI ELECTRIC CO LTD. 12 Feb. 1993.
Wilson, et al, "Thin-Film Catalyst Layers for Polymer Electrolyte Fuel Cell Electrodes", Journal of Applied Electrochemistry, vol. 22, No. 1, Jan. 1992, pp. 1-7.
Uchida, et al., Journal of the Electrochemical Society, vol. 142, No. 2, Feb. 1995, pp. 463-468.
Masahiro Watanabe et al, "New Preparation Method of a High Performance Gas Diffusion Electrode Working at 100 % Utilization of Catalyst Clusters and Analysis of the Reaction Layer"; J. Electroanal. Chem., 197 (1986) pp. 195-208.

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