Fuel cell proton exchange membrane with micro texture and processing method of fuel cell proton exchange membrane

Abstract

The invention provides a fuel cell proton exchange membrane with a micro texture and a processing method of the fuel cell proton exchange membrane. A plurality of petal-shaped concave-convex compositetextures are distributed on the surface of a cathode of the fuel cell proton exchange membrane in a gradient manner that the inside is dense and the outside is sparse. The concave-convex composite texture comprises pits and protrusions, a circle of protrusions are arranged on the edges of the pits, and a plurality of semi-ellipsoid micro pits are evenly distributed in the inner surfaces of the pits. The surface of the cathode is divided into a central area, a middle area and a peripheral area according to the distance between every two adjacent concave-convex composite textures, and in each area, the distance between every two adjacent concave-convex composite textures is gradually increased from inside to outside in a gradient mode. The concave-convex composite texture can effectively increase the surface area of the cathode surface of the proton exchange membrane, facilitates full contact between the catalyst and reaction gas, and improves the reaction efficiency; and the carbon-supported platinum catalyst can be stably embedded in the structure, and the active area of the catalyst is increased, so that the utilization rate of the catalyst is increased.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell proton exchange membrane with a micro-texture and a processing method thereof. Background technique [0002] As the problem of environmental pollution becomes more and more serious, fuel cells have attracted attention at home and abroad because of their high conversion efficiency and non-pollution characteristics. Proton exchange membrane fuel cell (PEMFC) is a widely used type of fuel cell. PEMFC is considered to be a fuel cell due to its advantages of high energy conversion efficiency, high operational reliability, no pollution to the environment, few moving parts, and no noise. It is the most promising green energy conversion device to replace traditional fossil energy. [0003] The membrane electrode is the core structural component of the proton exchange membrane fuel cell. The proton exchange membrane is one of the core components of the membrane electrode. At the sa...

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Problems solved by technology

The above patents help to increase the three-phase reaction interface and improve the utilization rate of the catalyst, but the operation is too complicated and time-consuming, which is not conducive to large-scale commercial production

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