Preparation method of composite membrane with catalytic function for positive and negative electrodes used for all-vanadium redox flow batteries

Abstract

The invention relates to the field of ion exchange membranes used for all-vanadium redox flow batteries (VRB), and specifically discloses a preparation method of a composite membrane with a catalytic function for positive and negative electrodes used for the all-vanadium flow batteries. The membrane of a majority of all-vanadium flow batteries has the problem that the requirements, in some aspects, of the batteries can be met so that a proton conduction membrane with excellent overall performance is difficult to obtain, namely the problem is a balance problem between vanadium resistance and conductivity performance. Metal salt with an obvious catalytic function in reactions of the positive and negative electrodes is introduced into two sides of the membrane by adopting a step-by-step tape casting method, and the membrane has the catalytic function, so that the composite membrane with the catalytic function is prepared. The composite membrane prepared by the invention has good vanadium resistance performance, mechanical property and good single VRB battery performance, and the composite membrane can be widely applied to the field of the all-vanadium redox flow batteries.

Description

technical field

[0001] The invention relates to the field of ion-exchange membranes for all-vanadium redox flow batteries (VRB), in particular to a method for preparing a composite membrane for all-vanadium redox flow batteries that has catalytic functions for positive and negative electrodes. Background technique

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