Biomass aqueous conductive binding system and chemical power supply employing same

A technology based on biomass and water system, which is applied in the field of water system conductive bonding system and chemical power supply. It can solve the problems of long mixing time of electrode slurry, pollution of environment by organic solvent NMP, high cost of binder PVdF, etc., to reduce stirring time, Good wettability, simple process effect

Inactive Publication Date: 2017-07-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the current preparation process of chemical power pole pieces, such as the high cost of the binder PVdF used, the pollution of the environment by the organic solvent NMP, the need to use a large amount of conductive additives, and the long mixing time of the electrode slurry, etc., to provide a production Substance water-based conductive bonding system and chemical power source using the system

Method used

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  • Biomass aqueous conductive binding system and chemical power supply employing same
  • Biomass aqueous conductive binding system and chemical power supply employing same
  • Biomass aqueous conductive binding system and chemical power supply employing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Li-ion battery system. The preparation method of the biomass water-based conductive bonding system and the lithium-ion battery cathode sheet using the system is completed according to the following steps:

[0034] 1. At 10-80 degrees Celsius, add 5% oxalic acid into the monomer in the liquid phase, and wait until the catalyst is completely dissolved.

[0035] 2. In the above mixed solution, add lithium iron phosphate cathode material, the mass ratio of monomer to active material is 20:100, and mix and stir for 5 minutes with a high-speed homogenizer to obtain a uniform electrode paste.

[0036] 3. The obtained electrode paste is coated or sprayed on the electrode current collector, and after a heating and curing procedure, the heating temperature is 80-140 degrees Celsius, and the curing time is 30 minutes. The preparation of the lithium-ion battery electrode sheet is completed.

[0037] In this implementation, the content of the generated polymer binder in the pole pi...

Embodiment 2

[0046] Li-ion battery system. The preparation method of the biomass water-based conductive bonding system and the lithium-ion battery cathode sheet using the system is completed according to the following steps:

[0047] 1. At 10-80 degrees Celsius, preferably 40 degrees Celsius, add 10% by mass of oxalic acid into the monomer in the liquid phase, and wait until the catalyst is completely dissolved.

[0048] 2. In the above mixed solution, add lithium iron phosphate positive electrode material, the mass ratio of its monomer to active material is 20:100, and mix and stir for 5 minutes through a high-speed homogenizer to obtain a uniform electrode paste.

[0049] 3. The obtained electrode paste is coated or sprayed on the electrode current collector, and after a heating and curing procedure, the heating temperature is 120 degrees Celsius, and the curing time is 30 minutes. The preparation of the lithium-ion battery electrode sheet is completed.

[0050] Compared with Example 1,...

Embodiment 3

[0056] Li-ion battery system. The preparation method of the biomass water-based conductive bonding system and the lithium-ion battery cathode sheet using the system is completed according to the following steps:

[0057] 1. At 20 degrees Celsius, add 30% mass fraction of formic acid into the monomer in the liquid phase, and mix well.

[0058] 2. In the above mixed solution, add the electrode lithium cobaltate positive electrode material, the mass ratio of its monomer to active material is 10:100, mix and stir for 10 minutes to obtain a uniform electrode paste.

[0059] 3. The obtained electrode paste is coated or sprayed on the electrode current collector, and after a heating and curing procedure, the heating temperature is 120 degrees Celsius, and the curing time is 60 minutes. The preparation of the lithium-ion battery electrode sheet is completed.

[0060] Using lithium cobalt oxide as the active material, the specific capacity of the electrode 5C rate is higher than 100mA...

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Abstract

The invention discloses a biomass aqueous conductive binding system and a chemical power supply employing the same, and belongs to the technical field of a conductive binding agent and a battery. The conductive binding system is a conductive polymer formed through in-situ polymerization of a soluble biomass monomer under a catalytic condition. The system is characterized in that under an aqueous condition, an electrode active substance is directly mixed with a liquid-phase monomer, and the obtained paste is sprayed on an electrode current collector; under the catalytic condition, the conductive polymer is generated from the monomer through in-situ polymerization reaction, and the active substance is directly connected and is fixed on the electrode current collector; and meanwhile, the generated polymer binding agent has conductivity, and the conductive binding agent in a pole plate can be reduced or substituted. By the conductive binding system, the problems that the electrode binding agent used by the chemical power supply does not have conductivity and is high in cost, an organic solvent which is used is expensive, environmental pollution exists, a paste mixing process which is used is long in stirring time and a positive / negative pole plate fabrication process is low in production efficiency are solved.

Description

technical field [0001] The invention belongs to the technical field of conductive adhesives and batteries, and relates to a water-based conductive adhesive system formed by the polymerization of biomass monomers and a chemical power source using the conductive adhesive formed by the in-situ polymerization of the biomass monomers. Background technique [0002] As a kind of energy storage system with high energy density and low cost, chemical power supply has served human beings for a hundred years. The currently popular lithium-ion battery is a kind of chemical power supply. In the future, with the promotion of electric vehicles and the development of renewable wind power, as the preferred energy storage battery, the application scale of chemical power will be further increased. [0003] A typical chemical power supply structure is composed of positive electrode, negative electrode, electrolyte and separator. The positive and negative electrodes include electrode active mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/0525H01M10/054H01M10/34H01M4/139H01G11/30H01G11/86
CPCH01G11/30H01G11/86H01M4/139H01M4/62H01M4/624H01M10/0525H01M10/054H01M10/345Y02E60/10
Inventor 王殿龙刘铁峰张山青林展
Owner HARBIN INST OF TECH
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