Honda Motor Co., Ltd.

Shintaro Tanaka

Masaki Tani

Yoichi Asano

Yukihito Tanaka

Suguru Ohmori

Ryoichiro Takahashi

Yoshihito Kimura

Takuma Yamawaki

Ryugo Fujitsuka

Seiji Sugiura

Naoki Mitsuta

Satoru Terada

Eri Terada

Kazuo Nunokawa

Taku Eguchi

A resin frame equipped membrane electrode assembly includes an MEA having different sizes of components, and a resin frame member. A resin melt portion is provided for the resin frame member. The inside of a first gas diffusion layer is impregnated with resin as a part of the resin melt portion. A thin portion is provided at an outermost peripheral portion of the resin frame member through a step at an outermost peripheral portion of the resin melt portion, and the thin portion is thinner in a thickness direction than the resin melt portion.

Resin frame equipped membrane electrode assembly for fuel cell and method of producing the same

A resin-framed stepped membrane electrode assembly for a fuel cell, includes a stepped membrane electrode assembly and a resin frame member. The resin frame member surrounds a membrane outer periphery end of a solid polymer electrolyte membrane and includes an inner protruding portion protruding from the membrane outer periphery end toward a second electrode and is joined to the stepped membrane electrode assembly with an adhesive. The inner protruding portion includes a bank portion, a groove portion, and a ledge portion. The roughness of the bank surface is smaller than a roughness of the groove surface.

Resin-framed stepped membrane electrode assembly for fuel cell

A membrane electrode assembly for a polymer electrolyte fuel cell includes: a proton conductive membrane for conducting protons; electrode catalyst layers arranged at both sides of the proton conductive membrane containing catalyst particles and an electrode electrolyte; and gas diffusion layers arranged on the respective electrode catalyst layers, having a porous basic material. Further, intermediate layers each having a thickness of 2-6 &#x3bc;m are included, with noble metallic nanoparticles, an electrode electrolyte and carbon powder.

Membrane electrode assembly for polymer electrolyte fuel cell and polymer electrolyte fuel cell

A membrane electrode assembly including: a solid polymer electrolyte membrane having proton conductivity; a cathode electrode catalyst layer disposed on one side of the solid polymer electrolyte membrane; an anode electrode catalyst layer disposed on the other side of the solid polymer electrolyte membrane; and two gas diffusion layers disposed on a side of the cathode electrode catalyst layer and a side of the anode electrode catalyst layer, respectively; wherein the gas diffusion layer in the anode side is smaller in contact angle to water than the gas diffusion layer in the cathode side. The membrane electrode assembly also includes at least two coating layers different in properties from each other between the gas diffusion layer and the cathode electrode catalyst layer, and at least two coating layers different in properties from each other between the gas diffusion layer and the anode electrode catalyst layer.

Membrane electrode assembly for use in solid polymer electrolyte fuel cell

A membrane electrode assembly that includes a cathode electrode catalyst layer and an anode electrode catalyst layer respectively disposed on one side and the other side of a solid polymer electrolyte membrane, gas diffusion layers disposed respectively on the sides of the electrode catalyst layers; and intermediate layers having pores and disposed respectively between the electrode catalyst layer and the gas diffusion layer and between the electrode catalyst layer and the gas diffusion layer. The volume per unit area and per unit mass of the pores having pore size of 0.1 to 10 &#x3bc;m in the intermediate layer in the cathode side is larger than that in the intermediate layer in the anode side. The pore volume of the intermediate layer in the cathode side is 1.7 to 4.3 &#x3bc;l/cm/mg and that of the intermediate layer in the anode side is 0.5 to 1.4 &#x3bc;l/cm/mg.

Growing community of inventors

Wako, Japan

Shintaro Tanaka