Trivalent vanadium ion electrolyte and preparation method thereof, and vanadium battery

Abstract

The invention provides a preparation method of a trivalent vanadium ion electrolyte, the trivalent vanadium ion electrolyte prepared with the method, and a vanadium battery. The trivalent vanadium ion electrolyte preparation method comprises the steps that: a sulfuric acid solution comprising vanadyl sulfate is adopted as a cathode, and a sulfuric acid solution is adopted as an anode, wherein the molar amount of the sulfuric acid of the anode equals that of the vanadyl sulfate in the sulfuric acid solution comprising vanadyl sulfate; constant-voltage electrolysis is carried out, such that the trivalent vanadium ion electrolyte with a molar ratio of trivalent vanadium to all vanadium higher than 0.98 is obtained. With the method provided by the invention, the trivalent vanadium ion electrolyte with relatively high purity can be stably obtained.

Description

technical field

[0001] The invention relates to a method for preparing a trivalent vanadium ion electrolyte, a trivalent vanadium ion electrolyte prepared by the method, and a vanadium battery. Background technique

[0002] The vanadium redox flow battery realizes the storage and release of electrical energy through the mutual transformation between vanadium ions in different valence states. It is the only battery system composed of the same element among many chemical power sources. It can change unstable electric energy input into continuous, safe and reliable output, and can solve major energy storage technical problems in the process of large-scale utilization of wind energy and solar power generation. The vanadium redox flow battery can also be applied to the peak shaving and valley filling of the existing power grid system, improving the safety and reliability of the power grid, and has a broad application space in the emergency power supply of the communication system...

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