US 2010/0167099 A1 · MEMBRANCE ELECTRODE ASSEMBLY (MEA) STRUCTURE AND MANUFACTURING METHOD THEREOF

Abstract

A membrane electrode assembly (MEA) structure includes a proton exchange membrane having opposite first and second sides, a cathode catalyst layer disposed at the first side of the proton exchange membrane, an anode catalyst layer disposed at the second side of the proton exchange membrane, a first composite gas diffusion layer disposed at the first side of the proton exchange membrane and adjacent to the cathode catalyst layer, including a first gas diffusion substrate layer and a first micro-porous layer disposed between the first gas diffusion substrate layer and the cathode catalyst layer, and a second composite gas diffusion layer disposed at the second side of the proton exchange membrane and adjacent to the anode catalyst layer, including a second gas diffusion substrate layer and a second micro-porous layer disposed between the second gas diffusion substrate layer and the anode catalyst layer.

Claims29

Dependent claims

A membrane-electrode assembly (MEA) structure, comprising:

a proton exchange membrane having opposite first and second sides;
a cathode catalyst layer disposed at the first side of the proton exchange membrane;
an anode catalyst layer disposed at the second side of the proton exchange membrane;
a first composite gas diffusion layer disposed at the first side of the proton exchange membrane and adjacent to the cathode catalyst layer, wherein the first composite gas diffusion layer comprises a first gas diffusion substrate layer and a first micro-porous layer disposed between the first gas diffusion substrate layer and the cathode catalyst layer;
and
a second composite gas diffusion layer disposed at the second side of the proton exchange membrane and adjacent to the anode catalyst layer, wherein the second composite gas diffusion layer comprises a second gas diffusion substrate layer and a second micro-porous layer disposed between the second gas diffusion substrate layer and the anode catalyst layer.

3 more elements

A method for fabricating a membrane electrode assembly (MEA) structure, comprising:

providing a proton exchange membrane having opposite first and second sides;
providing and disposing a first composite gas diffusion layer at the first side of the proton exchange membrane, wherein the first composite gas diffusion layer comprises a first gas diffusion substrate layer and a first micro-porous layer;
forming a cathode catalyst layer over the first micro-porous layer of the first composite gas diffusion layer;
providing and disposing a second composite gas diffusion layer at the second side of the proton exchange membrane, wherein the second composite gas diffusion layer comprises a second gas diffusion substrate layer and a second micro-porous layer;
forming an anode catalyst layer over the second micro-porous layer of the second composite gas diffusion layer;
and
thermally compressing the first composite gas diffusion layer, the cathode catalyst layer, the proton exchange membrane, the anode catalyst layer and the second composite gas diffusion layer to form the MEA structure.

4 more elements

Dependencies are inferred from the claim text.

Membrance electrode assembly (mea) structure and manufacturing method thereof

Life of this patent

Membrance electrode assembly (mea) structure and manufacturing method thereof

Life of this patent

Abstract

Claims29