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Positive and negative electrodes and high-energy solid-state vanadium battery using positive and negative electrodes

A technology of positive and negative electrodes and conductive agents, applied in the field of high-energy solid-state vanadium batteries, can solve the problems of electrolyte crystallization, low energy density, liquid leakage, etc., and achieve the effect of improving energy density, high conversion efficiency, and improving energy density.

Active Publication Date: 2019-02-12
湖南汇锋高新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the problems of low energy density, liquid leakage, and electrolyte crystallization in the above-mentioned prior art, the present invention proposes a positive and negative electrode, which is made of vanadium active material, acid, binder, conductive agent, and dispersant The mixture is uniformly coated on the positive electrode seal or the negative electrode seal, wherein, based on the total mass of all vanadium active materials, the binder is 0.5-10%, preferably 1-8%, more preferably 2-5%, Conductive agent is 0.5-20%, preferably 1-15%, more preferably 5-10%, dispersant is 1-15%, preferably 2-12%, more preferably 5-10%, vanadium active material is 4.5-7.0M , preferably 3.5 valence vanadium ions of 5-6M; the acidity is 3.0-6.0M, preferably 3.5-5.5M

Method used

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  • Positive and negative electrodes and high-energy solid-state vanadium battery using positive and negative electrodes
  • Positive and negative electrodes and high-energy solid-state vanadium battery using positive and negative electrodes
  • Positive and negative electrodes and high-energy solid-state vanadium battery using positive and negative electrodes

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Embodiment 1

[0039] With respect to the conductive agent Ketjen black of 10wt% of vanadium electrolyte, the binder styrene-butadiene rubber of 2wt%, the dispersant SiO of 3wt% 2 After stirring evenly, add it to the vanadium electrolyte: 4.5M (vanadium ion concentration) + 5.0M (acidity), and then stir until a uniform solid substance is formed. Apply the solid substance to the positive and negative electrode seals respectively, and compact it According to the schematic diagram of the battery, the pole, the current collector, the positive electrode, the seal, the diaphragm (ion exchange membrane, Zhejiang Qianqiu Environmental Protection Water Treatment Co., Ltd.), the seal, the negative electrode, the current collector, etc. (Graphite plate, Shanghai Toyo Carbon Co., Ltd.), the pole is placed in the battery casing, and the casing is pressed tightly to make a vanadium solid-state vanadium battery 1.

Embodiment 2

[0041] With respect to the conductive agent graphite powder of 8wt% of vanadium electrolytic solution, the binding agent sodium carboxymethyl cellulose of 5wt%, the dispersant polyacrylamide of 5wt% is stirred evenly and joins vanadium electrolytic solution: 4.5M (vanadium ion Concentration) + 5.0M (acidity), then stir until a uniform solid substance is formed, apply the solid substance to the positive and negative electrode seals respectively, compact and flatten, and then form the positive and negative electrodes; according to the schematic diagram of the battery, sequentially The pole, current collector, positive electrode, seal, diaphragm (ion exchange membrane, Zhejiang Qianqiu Environmental Protection Water Treatment Co., Ltd.), seal, negative electrode, current collector (graphite plate, Shanghai Toyo Carbon Co., Ltd.), pole Put it in the battery casing, and press the casing tightly to make a vanadium solid-state vanadium battery 2.

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Abstract

The invention relates to a positive / negative electrode and a high-energy solid-state vanadium battery using the positive / negative electrode. The positive / negative electrode is prepared by uniformly coating a sealing part of the positive electrode or a sealing part of the negative electrode with a mixture prepared from a vanadium active substance, acid, an adhesive, a conductive agent and a dispersant; on the basis of total mass of all the vanadium active substance, the mass of the adhesive is 0.5 to 10%, the mass of the conductive agent is 0.5 to 20%, and the mass of the dispersant is 1 to 15%; the vanadium active substance is 3.5-valence vanadium ion of 4.5 to 7.0M; the acidity is 3.0 to 6.0M.

Description

technical field [0001] The invention relates to a positive and negative electrode and a high-energy solid-state vanadium battery using the positive and negative electrode. Background technique [0002] High-energy solid-state vanadium battery is a new type of energy storage product. The electrolyte is solid. It is made by uniformly mixing high-activity vanadium compounds with conductive agents, binders, and dispersants. The highly active vanadium compounds are adsorbed on high-energy The specific surface area of ​​the conductive agent and the micropores of the dispersant appear to be solid. The high-energy solid-state vanadium battery is formed by compacting the active electrolyte and the current collector to form a composite electrode, and then separating the layers with a diaphragm to assist in sealing and fastening the components. Therefore, the high-energy solid-state vanadium battery does not require the delivery system and storage tanks required by the traditional flo...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/66H01M8/18
CPCH01M4/621H01M4/625H01M4/667H01M8/188Y02E60/10Y02E60/50
Inventor 王远望
Owner 湖南汇锋高新能源有限公司
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