Membrane electrode structure for fuel cell and preparation method

Abstract

The present invention relates to a membrane electrode structure for a fuel cell, comprising: a proton exchange membrane; a double-sided adhesive frame membrane, comprising an inner adhesive layer, a base membrane and an outer adhesive layer, and being combined to the upper surface and the lower surface of the proton exchange membrane through the inner adhesive layer; the double-sided adhesive frame membrane being provided with a frame membrane hollow part; a catalyst layer, combined to the upper surface and the lower surface of the proton exchange membrane through the frame membrane hollow part; a gas diffusion layer, bonded to the surface of the catalyst layer; a sealing outer frame layer, arranged on the periphery of the proton exchange membrane and combined to the outer adhesive layer of the double-sided adhesive frame membrane so as to form an outer frame sealing structure of the membrane electrode. The structure is simple, the proton exchange membrane can be effectively protected and prevented from being damaged, the use of the proton exchange membrane is reduced, the proton exchange membrane is saved, and the cost is reduced. The invention also relates to a corresponding preparation method.

Description

technical field [0001] The invention relates to the field of membrane electrode structures for fuel cells, in particular to a membrane electrode structure for fuel cells and a preparation method. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a chemical device that directly converts the chemical energy of fuel into electrical energy. It uses fuel and oxygen as raw materials. It has high energy conversion efficiency, no noise, and no pollution. It can become an electric vehicle. The power source; the general fuel is hydrogen. The membrane electrode is the core component of the fuel cell and the fundamental source of power for the fuel cell. Its cost accounts for 70% of the fuel cell stack and 35% of the fuel cell power system. The performance and durability of the membrane electrode directly determine the power of the fuel cell. The performance and durability of the stack and system; the structure of the membrane electrode in the prior art is com...

AI Technical Summary

Problems solved by technology

The membrane electrode is the core component of the fuel cell and the fundamental source of power for the fuel cell. Its cost accounts for 70% of the fuel cell stack and 35% of the fuel cell power system. The performance and durability of the membrane electrode directly determine the power of the fuel cell. The performance and durability of the stack and system; the structure of the membrane electrode in the prior art is complex, especially in the sealing structure, which is generally sealed with peripheral resin, but the sealing performance of the proton exchange membrane cannot be guaranteed without additional sealing, and the proton exchange membrane It is often wasted or damaged in the preparation, and the preparation method of the membrane electrode in the prior art is complicated

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