Plane type fuel cells

Abstract

Disclosed is a flat fuel cell assembly, comprising a membrane cell assembly, a cathodic porous collector layer, an anodic porous collector layer and an air blocking material layer; wherein the membrane cell assembly is provided with a proton exchange membrane, an anodic catalyst layer, a cathodic catalyst layer, an anodic gas diffusion layer and a cathodic gas diffusion layer; the anodic catalyst layer and the athodic catalyst layer are respectively arranged at the two sides of the proton exchange membrane; the anodic gas diffusion layer and the cathodic gas diffusion layer are arranged respectively on the anodic gas diffusion layer and the cathodic gas diffusion layer; the cathodic porous collector layer is arranged at one side of the cathodic gas diffusion layer and the anodic porous collector layer is arranged at one side of the anodic gas diffusion layer; in addition, the air blocking material layer is arranged on the cathodic gas diffusion layer and is provided with at least one hole which is exposed at the surface of the cathodic porous collector layer.

Description

technical field [0001] The present invention relates to a fuel cell structure, and in particular to a planar fuel cell stack. Background technique [0002] With the advancement of industry, the consumption of traditional energy such as coal, oil and natural gas continues to rise. Due to the limited stock of natural energy, it is necessary to develop new alternative energy to replace traditional energy, and fuel cells are an important and unique energy. A choice of practical value. [0003] In simple terms, a fuel cell is basically a power generating device that converts chemical energy into electrical energy using the reverse reaction of electrolysis of water. Taking a proton exchange membrane fuel cell as an example, it is mainly composed of a membrane electrode assembly (MEA for short) and two electrode plates. The thin film electrode group is composed of a proton exchange membrane (proton exchange membrane), an anode catalyst layer, a cathode catalyst layer, an anode ga...

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Problems solved by technology

[0010] In addition, Japanese Patent No. WO 2005 / 112172A1 discloses a fuel cell in which liquid fuel gasification components are supplied to the catalyst layer, which discloses that the anode structure of the fuel cell needs to include a fuel storage tank, a fuel gasification layer and Vaporized fuel storage chambers, etc., so that liquid fuel can be vaporized, and a moisture-retaining layer with appropriate moisture permeability and air permeability is provided on the cathode side, but the moisture-retention layer is a porous material with uniform micro-pores. It is very easy to block the pores on the moisturizing layer due to condensation of water vapor, so that the gas cannot enter and affect the output power of the fuel cell

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