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Preparation method of high-purity vanadyl sulfate, electrolyte prepared from high-purity vanadyl sulfate, and vanadium redox battery applying high-purity vanadyl sulfate

A vanadyl sulfate, high-purity technology, applied in the field of vanadium batteries, can solve the problems affecting the performance of electrolyte, affecting the performance and service life of vanadium batteries, etc.

Inactive Publication Date: 2013-12-25
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, vanadium batteries have relatively high requirements for the electrolyte, especially for impurity elements in the electrolyte. Many vanadium battery research units and enterprises generally recognize that impurities affect the performance of the electrolyte, and also affect the performance and service life of the vanadium battery. Therefore, the preparation of high Pure electrolyte is an important way to improve the performance of vanadium batteries

Method used

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  • Preparation method of high-purity vanadyl sulfate, electrolyte prepared from high-purity vanadyl sulfate, and vanadium redox battery applying high-purity vanadyl sulfate
  • Preparation method of high-purity vanadyl sulfate, electrolyte prepared from high-purity vanadyl sulfate, and vanadium redox battery applying high-purity vanadyl sulfate
  • Preparation method of high-purity vanadyl sulfate, electrolyte prepared from high-purity vanadyl sulfate, and vanadium redox battery applying high-purity vanadyl sulfate

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preparation example Construction

[0016] The preparation method of high-purity vanadyl sulfate according to one aspect of the present invention comprises the following steps: directly dissolving crude vanadium pentoxide in concentrated sulfuric acid to form an activated mixture, adding the mixture to deionized water for dissolving and filtering to obtain A solution containing pentavalent vanadium ions and sulfuric acid; the solution containing pentavalent vanadium ions V (V) and sulfuric acid is used as the negative electrode electrolyte, and placed in the cathode chamber, and the sulfuric acid solution is used as the positive electrode electrolyte, and placed in the anode chamber , control the pH value of the negative electrode electrolyte to 2.2-2.4 and perform impurity removal constant current electrolysis (for example, the current can be constant at a certain point in the range of 10-12A), so as to deposit chromium ions in the negative electrode electrolyte on the cathode; Remove the chromium deposited on t...

example 1

[0033] Prepare related materials. Among them, the composition of crude vanadium in Panzhihua Iron and Steel Co., Ltd. is: 93wt% V 2 o 5 , 7wt% of chromium oxide, others less than 10ppm. Concentrated sulfuric acid is analytically pure, d=1.84g / mL (d means density). (NH 4 ) 2 SO 4 It is analytically pure, and its ammonium sulfate content is above 99.0wt%.

[0034] Weigh 65g of crude vanadium pentoxide from Panzhihua Iron and Steel Co., Ltd., dissolve it in 30mL of concentrated sulfuric acid, and activate it for 10 minutes. Under the condition of stirring, slowly add the activated muddy mixture into deionized water, add water to dissolve to 400mL, and filter to obtain Add 14 g of ammonium sulfate to the solution containing sulfuric acid and pentavalent vanadium ions (abbreviated as vanadium solution).

[0035] Measure 30 mL of concentrated sulfuric acid, slowly add it into deionized water with stirring, and dissolve to obtain 400 mL of sulfuric acid solution. The vanadium...

example 2

[0041] Prepare related materials. Among them, the composition of crude vanadium in Panzhihua Iron and Steel Co., Ltd. is: 90wt% V 2 o 5 , 10wt% of chromium oxide, and the content of other components is less than 10ppm. Concentrated sulfuric acid is analytically pure, d=1.84g / mL. (NH 4 ) 2 SO 4 It is analytically pure, and its ammonium sulfate content is above 99.0wt%.

[0042] Weigh 67g of crude vanadium vanadium pentoxide from Panzhihua Iron and Steel Co., Ltd., dissolve it in 30mL of concentrated sulfuric acid, and activate it for 15 minutes. Under the condition of stirring, slowly add the activated muddy mixture into deionized water, add water to dissolve to 400mL, and filter to obtain 16 g of ammonium sulfate was added to a solution containing sulfuric acid and pentavalent vanadium ions.

[0043] Measure 30 mL of concentrated sulfuric acid, slowly add it into deionized water with stirring, and dissolve to obtain 400 mL of sulfuric acid solution. The vanadium soluti...

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Abstract

The invention provides a preparation method of high-purity vanadyl sulfate, an electrolyte prepared from high-purity vanadyl sulfate, and a vanadium redox battery applying high-purity vanadyl sulfate. The preparation method comprises the following steps: coarse vanadium pentoxide is directly dissolved in concentrated sulphuric acid to form an activation-induced mixture, and the mixture is added in deionized water to be dissolved and filtered to obtain a solution containing pentavalent vanadium ions and sulfuric acid; the solution containing pentavalent vanadium ions and sulfuric acid is taken as a cathode electrolyte, a sulfuric acid solution is taken as an anode electrolyte, the pH value of the cathode electrolyte is controlled to be 2.2-2.4, and the impurity-removal constant-current electrolysis is carried out, so as to deposit chromium ions in the anode electrolyte on a cathode; chromium on the cathode is removed, and then is subjected to constant-voltage electrolysis to obtain a vanadyl sulfate solution; the vanadyl sulfate solution is evaporated to dryness to obtain vanadyl sulfate containing crystallization water. The preparation method has the advantages that the high-purity vanadyl sulfate crystal suitable for being applicable to the vanadium redox battery and is convenient to transport.

Description

technical field [0001] The invention relates to the technical field of vanadium batteries, in particular to a preparation method of high-purity vanadyl sulfate, an electrolyte prepared by using the vanadyl sulfate, and a vanadium battery using the electrolyte. Background technique [0002] Generally speaking, energy is an important material basis for national economic development and people's lives. With the sustained and rapid development of my country's national economy, the demand for electricity has grown rapidly, and the contradiction between supply and demand of electricity has become increasingly serious, which has become the main bottleneck restricting the sustainable development of the economy and the improvement of people's living standards. In the long run, fossil energy will gradually be exhausted, and renewable energy will be developed to alleviate the shortage of fossil energy supply, optimize the energy structure, increase the proportion of renewable energy in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00H01M8/18
CPCY02E60/50
Inventor 毛凤娇孙朝晖李道玉彭穗杨林江陈文龙曹敏
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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