An organic-halogen electrolyte and its application in flow batteries

Abstract

The invention discloses an organic-matter-halogen electrolyte and an application of the organic-matter-halogen electrolyte to a flow battery. The electrolyte is prepared from an organic matter and a halide, which are dispersed in an organic solvent, wherein the organic matter is benzophenone; the halide is lithium bromide, lithium iodide, or lithium chloride; and the organic solvent is acetonitrile, propylene carbonate, ethylene carbonate, dimethoxyethane, dimethyl carbonate, or diethyl carbonate. By taking the mass of the whole electrolyte as a standard, the mass percentage of the organic matter is 0.1-30%, and the mass percentage of the halide is 0.5-30%. Compared with the prior art, in the technical scheme of the invention, a double flow battery system, taking the organic matter as a negative electrode active material and taking the halide as a positive electrode active material, has advantages of high open-circuit voltage, high power density, and high energy density; cost of active matters is greatly reduced; and the electrolyte is not limited by mineral resources of transition metals.

Description

technical field [0001] The invention relates to the technical field of flow batteries, in particular to an electrolyte using organic matter and halogen as active materials and its application in flow batteries. Background technique [0002] Flow batteries are mainly used for large-scale energy storage. Unlike other types of batteries, the electrodes of flow batteries are not storage media for electrical energy. It uses an electrolyte solution to store energy, and the battery cathode and anode electrolytes are stored in two separate storage tanks. It has the advantages of no solid state reaction, adjustable capacity, long life, no change in electrode material structure, high reliability, low price, low operation and maintenance costs, etc. [0003] A variety of flow batteries have been developed using different electrolyte solutions, mainly water-soluble electrolytes. Such as iron / chromium, all-vanadium and bromine / polysulfide flow energy storage batteries. The above flow ...

AI Technical Summary

Problems solved by technology

However, most of the reported non-aqueous flow batteries use metal complexes as active materials, so the cost is high and the solubility in organic solvents is poor, and the energy density has not been substantially improved.

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