Carbon felt with pouring sealant, electrode comprising carbon felt and flow battery pile

Abstract

The invention discloses a carbon felt with a pouring sealant, an electrode containing the carbon felt and a flow battery pile. A pore in the middle of the carbon felt is filled with the pouring sealant; the flow battery electrode comprises a carbon felt with pouring sealant and a plastic frame plate sleeved at the periphery of the carbon felt, and the edge sealed by the pouring sealant is welded in the plastic frame plate through laser; and the surface of the plastic frame plate is engraved with a flow channel for electrolyte circulation. The carbon felt is divided into the left part and the right part through the pouring sealant, electrons are directly transmitted through the carbon felt, the resistance of the bipolar plate body and the contact resistance between the bipolar plate and thecarbon felt are reduced, and the battery performance is greatly improved. According to the flow battery pile, a bipolar plate is not needed, so that the cost can be reduced; and meanwhile, the thickness of the galvanic pile can be reduced, the volume power density is improved, and the consumption and the cost of shell materials are reduced.

Description

technical field [0001] The present invention relates to a carbon felt with potting glue and a preparation method thereof, an electrode comprising the carbon felt, and a flow battery stack comprising the electrode. Background technique [0002] Vanadium battery (VRB), also known as all-vanadium redox flow battery, is a green and environmentally friendly large-capacity energy storage device. Its unique electrochemical principle makes it different from traditional batteries. Easy to adjust, deep discharge, electrolyte reuse, good safety, long life, etc Therefore, it has broad prospects in the field of large-scale energy storage. [0003] The current flow battery stack is mainly composed of three functional materials, bipolar plate, carbon felt and proton exchange membrane, plus a plastic frame plate (fluid channel and shell). The bipolar plate acts as an electron channel and separates the positive electrolyte and the negative electrolyte. The carbon felt acts as a reaction si...

AI Technical Summary

Problems solved by technology

Therefore, the existing stack structure is complex, the assembly process is complicated and the manufacturing cost is high

And the transmission of electrons through the bipolar plate will inevitably bring about a large contact resistance between the bipolar plate and the carbon felt, which will reduce the performance of the battery; the resistance of the bipolar plate itself will further reduce the performance of the battery

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