A kind of preparation method of membrane electrode and fuel cell

Abstract

The invention provides a preparation method of a membrane electrode, comprising: coating the catalyst slurry on both surfaces of an anion exchange membrane and performing cross-linking treatment to obtain a basic film-coated electrode; placing the basic film-coated electrode in the cathode and anode gas diffusion Hot pressing is performed between the layers to obtain a membrane electrode; the catalyst slurry contains an anion exchange resin with the same components as the anion exchange membrane, and the anion exchange resin has a group capable of crosslinking. The preparation method of the membrane electrode provided by the invention has the same composition as that of the anion exchange resin in the catalytic layer, both of which have groups capable of crosslinking, and are formed by crosslinking the anion exchange membrane and the catalytic layer An overall cross-linked membrane-covered electrode, the membrane electrode prepared by this post-crosslinking method has high mechanical strength, and can also reduce the OH between the cathode and anode catalyst layer and the anion exchange membrane in the membrane electrode. ‑ conduction resistance.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for preparing a membrane electrode and a fuel cell. Background technique [0002] In recent years, energy crisis and environmental pollution have become a major problem facing mankind. Fuel cells have been extensively studied due to their advantages of no pollution and high energy efficiency, among which ion-exchange membrane fuel cells are the representative. In the previous decade, proton exchange membrane fuel cell (PEMFC) became the mainstream research object among ion exchange membrane fuel cells, which benefited from its high energy density. However, the ion-exchange membrane and noble metal catalyst used in proton exchange membrane fuel cell (PEMFC) are expensive, which greatly limits its application. [0003] Major anion exchange membrane fuel cells (AEMFC) have received great attention in recent years, and it is expected to become a substitute for proton exc...

AI Technical Summary

Problems solved by technology

Although this method improves the adhesion of the catalytic layer on the anion exchange membrane, the increase of the transition layer does not substantially improve the phase interface problem in the catalytic layer, and the increase of the transition layer increases the thickness of the membrane electrode itself, which It has a negative effect on the conduction of ions and will reduce the performance of the battery

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