Preparation method of composite electrode of flow battery

A composite electrode and liquid flow battery technology, which is applied in fuel cells, regenerative fuel cells, circuits, etc., can solve the problems of poor conductivity and mechanical strength of bipolar plates, so as to improve conductivity, improve mechanical strength, and reduce resistivity Effect

Inactive Publication Date: 2020-08-11
乐山创新储能技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology, provide a method for preparing a composite electrode of a flow battery, and solve the problem that the method for preparing a bipolar plate of a flow battery in the current technology is likely to cause bipolar plates to appear Problems of poor electrical conductivity and poor mechanical strength

Method used

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  • Preparation method of composite electrode of flow battery
  • Preparation method of composite electrode of flow battery

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method for a composite electrode of a flow battery, the steps mainly comprising:

[0031] A, thermoplastic resin is dissolved in solvent one and makes resin solution;

[0032] The thermoplastic resin can be mixed with one or more of chlorinated polyvinyl chloride, fluorinated polyvinyl chloride, polystyrene, ethylene-tetrafluoroethylene copolymer, and the solvent one is tetrahydrofuran, toluene, xylene, chloroform, tetrachloro One of carbon dioxide and dichloromethane, the weight percentage of the thermoplastic resin is 5-25%, preferably 20-25%, more preferably 22%-25%, and a plasticizer can also be added to make the composite electrode in the While guaranteeing strength, it has certain toughness, reduces brittleness, and improves bending strength. The plasticizer can specifically use dibutyl phthalate; in this embodiment, the thermoplastic resin only uses chlorinated polyvinyl chloride, chlorinated poly The weight percentage of vinyl chloride (CPVC) is 2...

Embodiment 2

[0051] A preparation method for a composite electrode of a flow battery, the steps mainly comprising:

[0052] A, thermoplastic resin is dissolved in solvent one and makes resin solution;

[0053] In this embodiment, the thermoplastic resin is formed by mixing fluorinated polyvinyl chloride and polystyrene at a ratio of 1:1, the solvent one is toluene, the thermoplastic resin is 22% by weight, and the toluene is 78% by weight;

[0054] When preparing the resin solution, accurately weigh the toluene and add it to the container first, then slowly add the thermoplastic resin into the container and keep stirring during the addition process, and finally ensure that the thermoplastic resin is completely dissolved and stirred to obtain a resin solution;

[0055] B. Putting the porous conductive material layer into the resin solution obtained in step A for vibration impregnation, so that the resin solution is filled into the pores of the porous conductive material layer to obtain an i...

Embodiment 3

[0067] A preparation method for a composite electrode of a flow battery, the steps mainly comprising:

[0068] A, thermoplastic resin is dissolved in solvent one and makes resin solution;

[0069] Thermoplastic resin adopts polystyrene and ethylene-tetrafluoroethylene copolymer 1:1 to form, solvent one adopts chloroform, and adds plasticizer, plasticizer adopts dibutyl phthalate, in the present embodiment, When the weight percentage of thermoplastic resin is 20%, the weight percentage of dibutyl phthalate can be 3.5%, and the weight percentage of chloroform is 76.5%;

[0070] When preparing the resin solution, accurately weigh the chloroform and dibutyl phthalate and add it into the container for stirring and mixing, then slowly add the thermoplastic resin into the container and keep stirring during the addition process to ensure that the thermoplastic resin is dissolved Completely and stir and mix to finally obtain the resin solution;

[0071] B. Putting the porous conducti...

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Abstract

The invention discloses a preparation method of a composite electrode of a flow battery. The preparation method comprises the following steps: dissolving thermoplastic resin in a solvent I to preparea resin solution; putting the porous conductive material layer into a resin solution for vibration impregnation, so that pores of the porous conductive material layer are filled with the resin solution to obtain an intermediate product I; removing the resin solution on the surfaces of the two sides of the porous conductive material layer of the intermediate product I to obtain an intermediate product II; removing the solvent I from the intermediate product II to obtain an intermediate product III; and coating conductive agents on the surfaces of the two sides of the porous conductive materiallayer of the intermediate product III, and then heating and pressurizing the intermediate product III to obtain the composite electrode. The pores of the porous conductive material layer can be effectively filled with the resin, meanwhile, the resin covering the surface of the porous conductive material layer is reduced, the mechanical strength of the composite electrode is improved, the resistivity is effectively reduced, and the performance of the flow battery is effectively improved.

Description

technical field [0001] The invention relates to the technical field of electrochemical flow batteries, in particular to a preparation method for a composite electrode of a flow battery. Background technique [0002] Liquid flow battery is a kind of electrochemical energy storage device. It uses the positive and negative electrolytes to separate and circulate a high-performance battery. It has the characteristics of high capacity, wide application field and long cycle life. It is a new energy product. , unlike batteries that usually use solid material electrodes or gas electrodes, its active substance is a flowing electrolyte solution, and its most notable feature is large-scale power storage. The flow battery is composed of a stack unit, an electrolyte solution, an electrolyte solution storage and supply unit, and a control management unit. The main feature of a flow battery that distinguishes it from other batteries is that it dissolves the electrochemically active substanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0213H01M8/0221H01M8/0223H01M8/18
CPCH01M8/0213H01M8/0221H01M8/0223H01M8/188Y02E60/50
Inventor 陈继军唐升智伍林
Owner 乐山创新储能技术研究院有限公司
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