Zinc-bromine redox flow battery

Abstract

The invention relates to a zinc-bromine redox flow battery. A separator of the zinc-bromine redox flow battery employs a nanopore through film and a lead-acid storage battery PE partition plate composite separator, a positive half-cell redox flow chamber isolated by the composite separator is a dual-redox flow chamber isolated by a positive electrode plate, a positive electrode material is a micropore, porous and hole through graphene electrode, a positive dual-redox flow chamber electrolyte can circulate through the electrode material, a battery electrolyte is added into a nanometer silicon dioxide suspension liquid, the concentration of the electrolyte is increased, the mobility of the electrolyte when the battery is in a non-working station is reduced, the migration of a bromine element is reduced, so that the charge-discharge efficiency and the energy efficiency of the battery are improved. The zinc-bromine redox flow battery employs such a structure and a partition material, the manufacturing cost of the zinc-bromine redox flow battery is substantially reduced, so that the battery can be widely applied.

Description

technical field [0001] The invention relates to a zinc-bromine flow battery in the chemical energy storage technology, in particular to a zinc-bromine flow battery diaphragm adopting a permeable membrane instead of an expensive ion membrane; the positive half-cell of the zinc-bromine flow battery is a double flow chamber. Background technique [0002] Compared with other batteries, zinc-bromine flow energy storage batteries have the advantages of high energy conversion efficiency, large storage capacity, deep discharge, stable operation, long service life, safety and environmental protection, etc. It can be widely used in power grid peak regulation, solar energy, wind energy renewable energy storage, electric vehicles and other fields. [0003] The active material of the flow battery exists in the electrolyte, and the battery is separated by a diaphragm into a positive half-cell and a negative half-cell, which are respectively connected to positive and negative electrolyte s...

AI Technical Summary

Problems solved by technology

[0005] At present, the main technical problem of zinc-bromine flow battery is that the ion exchange membrane used as the battery separator is expensive, resulting in high battery cost and cannot be widely used; the solubility of bromine in the electrolyte is high, and the dissolved bromine mass transfers to the zinc on the negative electrode. The surface directly reacts with zinc, causing serious self-discharge; during the discharge process, the bromine in the electrolyte and the positive electrode conduction surface are insufficient, which reduces the power density of the battery

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