W.l. Gore & Associates, Co., Ltd.

Takuya Kosaka

Yoichi Suzuki

Shinichi Nishimura

Tomoya Nomura

Atsushi Sakamoto

Masashi Maruyama

Tomoyuki Kawaguchi

A technology is provided that is capable of improving deterioration of a fuel cell due to non-stationary operation (startup/shutdown, fuel depletion). An anode-side catalyst composition comprising a catalyst having catalyst particles carried on electrically conductive material and an ion exchange resin, characterized in that the catalyst particle are formed of an alloy, of which oxygen reduction capability and water electrolysis are both lower than those of platinum, and which has hydrogen oxidation capability.

Anode-side catalyst composition for fuel cells, and membrane electrode assembly (MEA) for solid polymer fuel cells which comprises same

To provide a manufacturing method of a membrane electrode assembly which improves the reliability of seal, mechanical strength, and handling ability of a solid polymer type fuel cell. The manufacturing method of a membrane electrode assembly according to the present invention prepares a membrane electrode assembly which differs in size of gas diffusion layers at an anode side and cathode side, provides the outer peripheral edge of the membrane electrode assembly with a resin frame by molding, and, at that time, provides projections or a concave part and convex part at a top mold and bottom mold used for the molding so as to keep to a minimum the penetration of the resin frame material to the gas diffusion layers and/or electrode layers and prevent warping of the outer peripheral edges of the larger gas diffusion layer etc.

Method for manufacturing reinforced membrane electrode assembly and reinforced membrane electrode assembly

The present invention provides a method for manufacturing a membrane electrode assembly which improves the reliability of seal, mechanical strength, and handling ability of a solid polymer type fuel cell. The manufacturing method includes: preparing a membrane electrode assembly which differs in the size of the gas diffusion layers at the anode side and the cathode side; and providing a resin frame at the outer peripheral edge of the membrane electrode assembly by molding; wherein the molding includes the use of a mold that keeps penetration of the resin frame material into the gas diffusion layers and/or electrode layers to a minimum and prevents warping of the outer peripheral edges.

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Tokyo, Japan

Takuya Kosaka