A bipolar plate for a flow battery and its preparation and application

Abstract

The invention discloses a bipolar plate for flow batteries as well as preparation and an application of the bipolar plate. The bipolar plate is a carbon-plastic composite plate prepared from, in percentage by mass, 25%-35% of high-density polyethylene with the melt index being 2-10, 65%-75% of conducive filler and 0-2% of a lubricant or prepared from 25%-35% of high-density polyethylene with the melt index being 2-10 and 65%-75% of conductive filler. The bipolar plate solves the problems of poor halogen corrosion resistance and poor toughness of carbon-plastic composite bipolar plates taking polypropylene as a matrix as well as low conductivity of carbon-plastic composite bipolar plates, thus, the bipolar plate has high conductivity and good corrosion resistance and can reduce ohm internalresistance of flow energy storage batteries and prolong the service life of piles.

Description

technical field

[0001] The invention relates to the field of liquid flow batteries in chemical energy storage technology, in particular to a bipolar plate of a liquid flow battery and a preparation method and application thereof. Background technique

[0002] Due to its independent output power and capacity, the liquid flow energy storage battery has flexible system design; high energy efficiency, long life, high operation stability and reliability, and low self-discharge; large degree of freedom in site selection, no pollution, and simple maintenance. With the advantages of low operating cost and high security, it has broad development prospects in large-scale energy storage. It is considered to be an effective method to solve the random and intermittent unsteady characteristics of renewable energy power generation systems such as solar energy and wind energy. There are significant demands in power generation and smart grid construction.

[0003] As a key component of the ...

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