Method for preparing electrolyte for vanadium redox flow battery

A flow battery and electrolyte technology, applied in secondary batteries, regenerative fuel cells, hybrid battery parts, etc., can solve the problems of reducing the energy efficiency of vanadium batteries, blocking batteries, reducing battery energy efficiency, etc., and achieving easy scale. Effects of industrial production, increased energy density, increased energy efficiency
CN1828991AInactive Publication Date: 2006-09-06缪强
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
缪强
Publication Date
2006-09-06
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The present invention relates to a preparation method for electrolyte of vanadum oxidation-reduction liquid stream. It contains 1, putting weight ratio 1.5-2.5 :1 vanadium trioxide and vanadium pentoxide powder in furnace and calcination at 200-700 degree centigrade, to make yellow powder became black powder to obtain multivalent vanadum compound, wherein quadravalence vanadum greater than total vanadum by 50 per cent, 2, adding distilled water in specific gravity 1.84 concentrated sulfuric acid to proceed 2 : 1 diluting then adding above-mentioned compound, according to mass fraction preparation to 65-75 per cent concentration vanadyl sulfate solution, wherein total vanadum concentration in 25-45 per cent, 3, adding 1-10 per cent concentration alkali salt or alkali salt and alkaline earth metal salt. Said invention adds additive in vanadyl sulfate solution, which not only raising vanadum ion solubility, preferably solving crystallizing jamming battery flow field problem in charge discharge process, but also reducing vanadium ion osmotic problem in film, greatly raising battery energy source efficiency.
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Description

technical field

[0001] The invention relates to a method for preparing an electrolyte for a storage battery, in particular to a method for preparing an electrolyte for a vanadium redox flow battery. Background technique

[0002] Since Marria Kazacos of the University of New South Wales in Australia proposed the use of vanadyl sulfate as the active material of the battery in 1985, after more than ten years of research and development, the vanadium redox flow battery technology has approached maturity. In recent years, vanadium redox flow cell has received great attention. The main reason is that this battery system has adjustable battery capacity, no solid-phase reaction, and no change in the structure and form of electrode materials. It is an ideal power storage device in wind power generation and solar power generation systems due to its low price, high cycle life, high safety and high energy efficiency. The vanadium battery uses vanadyl sulfate solution as the electrolyte...

Claims

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