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

A trivalent vanadium and electrolyte technology, which is applied in the field of vanadium batteries, can solve the problem of low purity of vanadium ion electrolyte and achieve the effect of reducing the impact

Inactive Publication Date: 2014-01-15
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects that the vanadium ion electrolyte of the prior art is not high in purity and needs to add additives to maintain its stability, and provide a trivalent vanadium ion electrolyte with higher purity and stability and its preparation Method and a vanadium battery

Method used

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

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preparation example 1

[0050] This preparation example is used to illustrate the trivalent vanadium ion electrolyte provided by the present invention and its preparation method.

[0051] Production of the electrolytic cell: use polyethylene with a weight average molecular weight of 3.5 million to make an anode pool and a cathode pool with specifications of 170×170×170mm, and place a perfluorosulfonic acid ion exchange membrane between the anode pool and the cathode pool and fix them , and then place the two platinum plates connected to the positive and negative poles of the external constant voltage power supply in the anode pool and the cathode pool respectively, wherein the effective area of ​​the platinum plate is 100×100mm 2 .

[0052] Preparation of sulfuric acid solution containing vanadyl sulfate: first add 550mL deionized water to the reactor, then add 259mL concentrated sulfuric acid to the reactor under stirring conditions, and when the temperature rises to 80°C, add 62 grams of V 2 o 3 ...

preparation example 2

[0062] This preparation example is used to illustrate the trivalent vanadium ion electrolyte provided by the present invention and its preparation method.

[0063] Production of the electrolytic cell: use polyethylene with a weight average molecular weight of 4 million to make an anode pool and a cathode pool with specifications of 170×170×170mm, and place a perfluorosulfonic acid ion exchange membrane between the anode pool and the cathode pool and fix it , and then place the two platinum plates connected to the positive and negative poles of the external constant voltage power supply in the anode pool and the cathode pool respectively, wherein the effective area of ​​the platinum plate is 100×100mm 2 .

[0064] Preparation of sulfuric acid solution containing vanadyl sulfate: first add 600mL deionized water to the reactor, then add 288mL concentrated sulfuric acid to the reactor under stirring conditions, and when the temperature rises to 80°C, add 75 grams of V 2 o 3 with...

preparation example 3

[0068] This preparation example is used to illustrate the trivalent vanadium ion electrolyte provided by the present invention and its preparation method.

[0069] Production of the electrolytic cell: use polyethylene with a weight average molecular weight of 4 million to make an anode pool and a cathode pool with specifications of 170×170×170mm, and place a perfluorosulfonic acid ion exchange membrane between the anode pool and the cathode pool and fix it , and then place the two platinum plates connected to the positive and negative poles of the external constant voltage power supply in the anode pool and the cathode pool respectively, wherein the effective area of ​​the platinum plate is 100×100mm 2 .

[0070] Preparation of sulfuric acid solution containing vanadyl sulfate: first add 600mL deionized water to the reactor, then add 269mL concentrated sulfuric acid to the reactor under stirring conditions, and when the temperature rises to 80°C, add 61.7 grams of V 2 o 3 wi...

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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...

Claims

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Application Information

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IPC IPC(8): H01M8/18
CPCH01M8/188Y02E60/50
Inventor 毛凤娇彭毅杨林江
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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