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Method for preparing vanadium redox battery negative pole electrolyte

A negative electrode electrolyte and vanadium battery technology, which is applied in the field of battery manufacturing, can solve the problems of poor electrolyte stability, affecting the performance of vanadium batteries, and difficult control of the ratio, and achieve good stability, electrochemical reactivity, and good reversibility. The effect of improving low temperature environment capability

Active Publication Date: 2012-08-29
承德新新钒钛储能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process cost of this type of method is high, and the vanadium in the obtained positive and negative electrolytes is in a mixed valence state, and the ratio is not easy to control; and because of the requirements of the electrolysis process, there are many restrictions on the use of additives, so the stability of the prepared electrolyte is relatively high. Poor, seriously affecting the performance of vanadium batteries, limiting its popularization and application

Method used

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  • Method for preparing vanadium redox battery negative pole electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Prepare vanadium battery negative electrode electrolyte according to the following steps:

[0029] (1) to 1:1 dilute H 2 SO 4 Add 450g of industrial high-purity V to 1000mL of the solution 2 o 3 (total vanadium content is greater than 67%), in the solution, continuous feeding purity is 99.999% (O 2 ≤0.001%) of high-purity nitrogen, the solution is heated to 80 ℃ ~ 150 ℃, and then add 90g additive Na 2 SO 4 , filter the insoluble matter, and get V 2 (SO 4 ) 3 solution;

[0030] (2) to 1:1 dilute H 2 SO 4 Add 450g of industrial high-purity V to 1000mL of the solution 2 o 3 (total vanadium content greater than 67%) and 240g reducing agent Na 2 S, the continuous feeding of the solution has a purity of 99.999% (O 2 ≤0.001%) of high-purity nitrogen, the solution is heated to 80 ℃ ~ 150 ℃, add 90g additive Na 2 SO 4 , filter the insoluble matter, and get VSO 4 solution;

[0031] (3)VSO 4 solution and V 2 (SO 4 ) 3 The solution is mixed according to the mo...

Embodiment 2

[0036] Prepare vanadium battery negative electrode electrolyte according to the following steps:

[0037] (1) to 1:1 dilute H 2 SO 4 Add 450g of industrial high-purity V to 1000mL of the solution 2 o 3 (total vanadium content is greater than 67%), in the solution, continuous feeding purity is 99.999% (O 2 ≤0.001%) of high-purity nitrogen, the solution is heated to 80 ℃ ~ 150 ℃, and then add 90g additive Na 2 SO 4 , filter the insoluble matter, get V 2 (SO 4 ) 3 solution;

[0038] (2) Take the above V 2 (SO 4 ) 3 Solution 500mL, to which continuous feeding purity is 99.999% (O 2 ≤0.001%) of high-purity nitrogen, the solution is heated to 80 ℃ ~ 150 ℃, then add 220g of reducing agent Na 2 SO 3 , filter the insoluble matter to get VSO 4 solution;

[0039] (3) V 2 (SO 4 ) 3 solution and VSO 4 The solution is mixed according to the molar ratio of 1:2, that is, it is prepared by V 2 (SO 4 ) 3 、VSO 4 , water and additive Na 2 SO 4 A mixed solution consisting...

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Abstract

The invention relates to the field of battery manufacturing, in particular to a method for preparing vanadium redox battery negative pole electrolyte, which is characterized in that industrial high purity V2O3 is adopted as raw material, proper additive and reducing agent are added into the raw material, and the vanadium redox battery negative pole electrolyte is directly prepared by a chemical method under the protection of high purity nitrogen. The method has the advantages of easily obtained raw material, low cost, simple reaction condition as well as simple and convenient operation; the prepared electrolyte is high in total vanadium concentration and good in stability, and has the using performance to be obviously improved in the low temperature environment; and the method is suitablefor industrialized production.

Description

technical field [0001] The invention relates to the field of battery manufacturing, in particular to a method for preparing a vanadium battery negative electrode electrolyte. Background technique [0002] Vanadium battery is a very promising green energy storage battery, its positive and negative electrodes are VO 2+ / VO 2 + and V 2+ / V 3+ . Compared with the traditional solid-phase battery, it has the advantages of small concentration polarization, large battery capacity and easy adjustment, long service life, high current charge and discharge resistance, active solution can be regenerated and recycled, and it is safe during manufacture, use and disposal. There are many advantages such as no harmful substances that pollute the environment. At present, the electrolyte solution for vanadium batteries mainly uses V 2 o 5 It is prepared by dissolving in sulfuric acid, reducing with a reducing agent, adjusting the concentration of vanadium after the reaction is complete,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18H01M10/38
CPCY02E60/12Y02E60/528Y02E60/10Y02E60/50Y02P70/50
Inventor 张群赞孙爱玲扈显琦
Owner 承德新新钒钛储能科技有限公司
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