Method for manufacturing solid polymer electrolyte fuel cell

Details Method for manufacturing solid polymer electrolyte fuel cell Method for manufacturing solid polymer electrolyte fuel cell

1996-01-23

1998-03-03

Lusignan, Michael

Coating processes

Electrical product produced

Fuel cell part

296235, 429 30, 429 33, 429 34, 429 42, B05D 512

Patent

active

057231737

ABSTRACT:
The invention provides a method for manufacturing a solid polymer electrolyte electrolyte fuel cell which exhibits higher performances by sufficiently and uniformly contacting the solid polymer electrolyte with a catalyst to increase the reaction area inside the electrode. The method comprises the steps of dispersing a carbon powder supporting a noble metal catalyst in an organic solvent to obtain a dispersion, mixing the resulting dispersion with an alcoholic solution of a solid polymer electrolyte to produce a colloid of the solid polymer electrolyte and simultaneously to obtain a mixed solution in which said colloid is adsorbed to the carbon powder, applying the mixed solution on one side of a gas-diffusion layer to produce an electrode, and pressing the resulting electrode on at least one side of a solid polymer electrolyte membrane to integrate them. Furthermore, a fluorocarbon polymer can be added, to thereby form a gas channel without excessive covering of the catalyst and increase gas permeability of the electrode. Thus, a solid polymer electrolyte fuel cell which exhibits high performances in a high current density area can be further provided.

REFERENCES:
patent: 4876115 (1989-10-01), Raistrick
patent: 5211984 (1993-05-01), Wilson
patent: 5474857 (1995-12-01), Uchida et al.
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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