A porous ion-conducting membrane supported by an organic framework copolymer and its preparation and application

Abstract

The invention discloses the application of a porous ion-conducting membrane supported by an organic skeleton copolymer in a liquid flow battery. This type of film is prepared by dissolving the soluble organic skeleton copolymer precursor A in the casting solution, coating it on the support, and undergoing phase inversion in a non-solvent containing the organic skeleton copolymer precursor B. The film is formed During the process, precursor A and precursor B in-situ generate organic framework copolymers in the film. The prepared porous ion conduction membrane containing the organic framework copolymer is processed, dried and pickled to prepare the porous ion conduction membrane supported by the organic framework copolymer. The designed and prepared porous ion-conducting membrane has good battery performance in the flow battery, especially the all-vanadium flow battery.

Description

Porous ion-conducting membrane supported by organic framework copolymer and its preparation and application technical field The present invention relates to the preparation of a kind of porous ion-conducting membrane supported by organic framework copolymer, particularly this kind of membrane Applications in flow batteries. Background technique Flow battery energy storage technology has the advantages of environmental friendliness, high safety, independent design of power and capacity, and a life cycle. The advantages of high price ratio, can be widely used in wind, solar and other renewable energy power generation and storage, emergency power systems, backup Power station and power system peak shaving and valley filling, etc. As a key material for flow batteries, the ion-conducting membrane acts as a barrier between the positive and negative electrodes The role of the active materials in the inter-connection and transfer of charge-balancing ions to form the interna...

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Problems solved by technology

But this method needs to make the aperture of the porous ion-conducting membrane before the solvent treatment is large enough (need to add enough hydrophilic regulating agent in the membrane casting liquid before casting the membrane, so that obtain enough large pore structure in the membrane forming process, The coulombic efficiency of the vanadium redox flow battery single cell assembled by the porous ion-conducting membrane before solvent treatment is low enough), which makes this method have certain limitations

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