Preparation method for three-phase composite electrode of vanadium battery

A composite electrode, three-phase technology, used in battery electrodes, fuel cells, regenerative fuel cells, etc., can solve the problems of insufficient stability of positive and negative electrolytes, reducing battery energy efficiency, blocking ion membrane pores, etc., to reduce battery leakage. liquid accident, improve cycle stability and charge-discharge reversibility, and improve the effect of stability

Active Publication Date: 2017-07-18
四川知格科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the positive and negative electrolytes of vanadium batteries in the prior art are not stable enough. When the total concentration of vanadium ions is greater than 2mol / L, crystallization may occur. The lower the temperature, the easier it is to crystallize.
Crystallization will block the pores of the ion membrane, so that the electrolyte cannot flow, and the battery cannot work
Although the ion membrane in the prior art has good proton conductivity, chemical stability, thermal stability and mechanical properties, its vanadium ion penetration is serious, which greatly reduces the energy efficiency of the battery.
The electrodes of vanadium batteries in the prior art are all made of graphite materials, but the graphite plate on the positive side is etched, which is easy to cause battery leakage accidents, resulting in serious safety hazards in the use of vanadium batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]A vanadium battery with multi-layer ionic membrane composite electrode comprises electrolytic solution and an ionic membrane placed in the electrolytic solution. Electrodes are respectively arranged on both sides of the ionic membrane, and the bottom of the electrode is inserted into the electrolytic solution.

[0033] The ionic membrane is a multi-layer material. A silicon dioxide layer with a thickness of 300nm is electroplated on the lower layer of the pretreated perfluorosulfonic acid proton membrane, and then a layer of perfluorosulfonic acid proton membrane two is electroplated on the lower layer of the silicon dioxide layer. A layer of diethylene glycol diacrylate phthalate is electroplated on the upper surface of the perfluorosulfonic acid proton membrane one, and a sodium alginate diester layer is electroplated on the lower surface of the perfluorosulfonic acid proton membrane two. into an ionic membrane with a multilayer structure.

[0034] will analyze pure V ...

Embodiment 2

[0037] A vanadium battery with multi-layer ionic membrane composite electrode comprises electrolytic solution and an ionic membrane placed in the electrolytic solution. Electrodes are respectively arranged on both sides of the ionic membrane, and the bottom of the electrode is inserted into the electrolytic solution.

[0038] The ionic membrane is a multi-layer material. A silicon dioxide layer with a thickness of 400nm is electroplated on the lower layer of the pretreated perfluorosulfonic acid proton membrane, and then a layer of perfluorosulfonic acid proton membrane two is electroplated on the lower layer of the silicon dioxide layer. A layer of diethylene glycol diacrylate phthalate is electroplated on the upper surface of the perfluorosulfonic acid proton membrane one, and a sodium alginate diester layer is electroplated on the lower surface of the perfluorosulfonic acid proton membrane two. into an ionic membrane with a multilayer structure.

[0039] will analyze pure V...

Embodiment 3

[0042] A vanadium battery with multi-layer ionic membrane composite electrode comprises electrolytic solution and an ionic membrane placed in the electrolytic solution. Electrodes are respectively arranged on both sides of the ionic membrane, and the bottom of the electrode is inserted into the electrolytic solution.

[0043] The ionic membrane is a multi-layer material. A silicon dioxide layer with a thickness of 357nm is electroplated on the lower layer of the pretreated perfluorosulfonic acid proton membrane, and then a layer of perfluorosulfonic acid proton membrane two is electroplated on the lower layer of the silicon dioxide layer. A layer of diethylene glycol diacrylate phthalate is electroplated on the upper surface of the perfluorosulfonic acid proton membrane one, and a sodium alginate diester layer is electroplated on the lower surface of the perfluorosulfonic acid proton membrane two. into an ionic membrane with a multilayer structure.

[0044] will analyze pure V...

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Abstract

The invention relates to a composite electrode of a vanadium battery, particularly to a preparation method for a sulfonated graphene / manganese dioxide / poly(3, 4-ethylenedioxythiophene)-polystyrene sulfonic acid three-phase composite electrode used for a multilayered ionic membrane composite electrode vanadium battery. The invention relates to the multilayered ionic membrane composite electrode vanadium battery, wherein the vanadium battery comprises an electrolyte and an ionic membrane arranged in the electrolyte; electrodes are arranged on the two sides of the ionic membrane respectively, and the bottoms of the electrodes are inserted into the electrolyte; the ionic membrane adopts a multilayered material; the electrolyte is a V(III) / V(IV) sulfuric acid solution system mixed electrolyte comprising an additive; and the electrodes are graphene composite electrodes. The multilayered ionic membrane composite electrode vanadium battery provided by the invention has the characteristics of relatively low vanadium ion crystallizing rate, relatively low vanadium ion permeability, long service life, and safety and stability in use.

Description

[0001] This application is a divisional application of an invention patent named: A multilayer ionic membrane composite electrode vanadium battery, application number: 201510682489.X, and the filing date of the parent application is October 21, 2015. technical field [0002] The invention relates to a composite electrode of a vanadium battery, in particular to a sulfonated graphene / manganese dioxide / poly(3,4-ethylenedioxythiophene)-polystyrene used for a multilayer ionic membrane composite electrode vanadium battery electrode A method for preparing a sulfonic acid three-phase composite electrode. Background technique [0003] Vanadium redox flow battery is a new type of electrochemical energy storage device, which consists of a battery stack, positive and negative electrolyte storage tanks and other auxiliary control devices. In addition to the characteristics of general redox flow batteries, vanadium batteries use vanadium ion solutions of different valence states as the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01M8/0228H01M8/0221H01M8/0215H01M4/88H01M4/86
CPCH01M4/8647H01M4/88H01M8/0215H01M8/0221H01M8/0228H01M8/188Y02E60/50
Inventor 肖勇
Owner 四川知格科技有限公司
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