Method for improving surface oxidation stability of proton exchange membrane of fuel cell

Abstract

The invention relates to the technical field of fuel cells, in particular to a method for improving the surface oxidation stability of a proton exchange membrane of a fuel cell, and the method comprises the following steps: S1, preparing a composite material proton exchange membrane, S2, modifying the proton exchange membrane, and S3, performing coating treatment. The proton exchange membrane is prepared from the composite material, the mechanical performance of the membrane is enhanced, the mechanical strength and flexibility of the proton exchange membrane can be remarkably improved by using the MOFs nanofiber and the silica sol, the performance of the proton exchange membrane can still be kept in a high-temperature environment, and the thermal stability is improved; specific amino functional groups can be introduced to the surface of the membrane containing the MOFs nanofibers through modification treatment, the proton conduction capacity of the membrane is enhanced, the oxidation stability of the membrane is improved, the durability and stability of the membrane can be further improved through coating treatment, and the high-efficiency performance of the membrane can be kept in long-term use; a porous free radical quenching layer is constructed on the surface of the membrane, so that the oxidation resistance of the proton exchange membrane is improved.

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