Membrane electrode assembly for solid polymer electrolyte fuel cell
AssigneeHonda Motor Co., Ltd.
InventorsJunji Matsuo, Kaoru Fukuda
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Abstract
A membrane electrode assembly for a solid polymer electrolyte fuel cell includes an anode electrode, a cathode electrode, and a polymer electrolyte membrane sandwiched by the electrodes, the catalyst layer of the cathode electrode containing a catalyst supporting particle in which a precious metal is supported on heat-treated carbon black or activated carbon, an ion conductive material, and a crystalline carbon fiber. Heat treatment is preferably applied at 2,500 to 3,000° C. (degrees Celsius). The membrane electrode assembly provides superior power generation performance.
Claims7
A membrane electrode assembly of a solid polymer electrolyte fuel cell, comprising:
- an anode electrode;
- a cathode electrode;
- and
- a polymer electrolyte membrane sandwiched by the electrodes;
- wherein each electrode is formed from a catalyst layer adjacent the polymer electrolyte membrane, and from a gas diffusion layer adjacent the catalyst layer, and
- wherein the catalyst layer of the cathode electrode contains a catalyst supporting particle in which a precious metal is supported on heat-treated carbon black or activated carbon subjected to heat processing at a temperature in a range of 2,500 to 3,000° C., an ion conductive material, and crystalline carbon fibers,
- wherein an amount of the crystalline carbon fibers is 20 to 60% by mass relative to an overall mass of the catalyst supporting particle, and
- wherein the catalyst layer of the cathode electrode has a pore volume for pores with a diameter in a range of 0.01 to 2.0 μm of at least 2.8 μl/cm2/mg•metal, and has a pore volume for pores with a diameter in a range of 0.01 to 0.15 μm of at least 1.7 μl/cm2/mg•metal.
Dependencies are inferred from the claim text.