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Synthesis method of three-dimensional conjugated conductive polyaniline and application of three-dimensional conjugated conductive polyaniline as lithium ion battery negative electrode binder

A technology of conductive polyaniline and synthesis method, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as increasing production costs, application limitations, and increasing preparation steps, and achieves improved tolerance, high capacity, and simplified experiments. effect of steps

Pending Publication Date: 2021-03-16
四川普利司德高分子新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, the use of new polymer composite binders or the modification of traditional binders can effectively improve their adhesiveness or conductivity. However, these methods have such disadvantages: (1) most polymer composites The binder has good bonding ability, but it is insulative. When it is used in the negative electrode slurry of lithium-ion batteries, it needs to add a conductive agent; (2) modifying the traditional binder can effectively improve its adhesion. ability and conductivity, however, it increases the preparation steps, which limits its application in industry and increases the production cost

Method used

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  • Synthesis method of three-dimensional conjugated conductive polyaniline and application of three-dimensional conjugated conductive polyaniline as lithium ion battery negative electrode binder
  • Synthesis method of three-dimensional conjugated conductive polyaniline and application of three-dimensional conjugated conductive polyaniline as lithium ion battery negative electrode binder
  • Synthesis method of three-dimensional conjugated conductive polyaniline and application of three-dimensional conjugated conductive polyaniline as lithium ion battery negative electrode binder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Synthetic method of three-dimensional conjugated conductive polyaniline for graphite negative electrode:

[0040] Weigh 9.3g of aniline, 2.7g of p-phenylenediamine and 6.15g of 1,3,5-triaminobenzene monomer, dissolve in 40ml of aqueous hydrochloric acid solution with a concentration of 0.5mol / L, and stir magnetically at a constant temperature of 4°C for 1h and appropriately ultrasonically dispersed to obtain component A; weigh 11.4g of ammonium persulfate, dissolve it in 20ml of deionized water to obtain component B, add component B to component A slowly drop by drop, after the dropwise addition, Stirring and polymerization were continued for 4 hours, and finally the product was centrifuged, washed with ethanol and deionized water until the filtrate was neutral, and vacuum-dried at 120°C for 12 hours to obtain a three-dimensional conjugated conductive polyaniline powder. After the powder was molded, a polyaniline sheet was obtained, and its conductivity was measured to be...

Embodiment 2

[0050] Synthesis and application method of three-dimensional conjugated conductive polyaniline binder for silicon anode.

[0051] A kind of synthetic method of three-dimensional conjugated conductive polyaniline that can be used for nano-silicon negative electrode:

[0052] Add 9.12g of lithium chloride solid, 4.65g of aniline monomer, and 6.15g of 1,3,5-triaminobenzene into 50ml of aqueous hydrochloric acid solution with a concentration of 1mol / L, stir and dissolve together, and place under magnetic stirring at a constant temperature of 4°C Dissolve completely in 1 hour to obtain component A; weigh 4.56g of ammonium persulfate, dissolve it in 10ml of deionized water, and obtain component B after it is completely dissolved; add component B to the above solution drop by drop, and add After completion, continue to stir and polymerize for 4 hours, and finally centrifuge the product, wash it with ethanol and deionized water until the filtrate is neutral, and dry it in vacuum at 12...

Embodiment 3

[0058] Synthesis method of three-dimensional conjugated conductive polyaniline for nano-silicon negative electrode:

[0059] Weigh 0.93g of aniline, 0.31g of o-phenylenediamine and 0.2g of 1,3,5-triphenylaminobenzene monomer and dissolve them in 10ml of 0.5mol / L aqueous hydrochloric acid solution, and place them under magnetic stirring at a constant temperature of 4°C 1h to obtain component A; weigh 1g of ammonium persulfate and dissolve it in 20ml of deionized water to obtain component B. Add component B to component A slowly drop by drop. After the dropwise addition, continue to stir and polymerize at a constant temperature of 4°C for 4 hours, and finally centrifuge the product, wash it with ethanol and deionized water until the filtrate is neutral, °C for 12 hours in vacuum to obtain a three-dimensional conjugated conductive polyaniline powder. After molding the powder, polyaniline sheets were obtained, and the electrical conductivity was measured to be 7.96×10 by four-pro...

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Abstract

The invention discloses a synthesis method of three-dimensional conjugated conductive polyaniline and an application of the three-dimensional conjugated conductive polyaniline as a lithium ion batterynegative electrode binder. The synthesis method of the three-dimensional conjugated conductive polyaniline comprises the following steps: preparing a protonic acid aqueous solution or a mixed aqueoussolution of a co-doping agent and protonic acid, dissolving aniline and a comonomer in the protonic acid aqueous solution to form a solution, and marking the solution as a component A; dissolving aninitiator into deionized water, and recording as a component B; slowly dropwise adding the component B into the component A under the condition of ice bath at 0-4 DEG C, and continuously stirring andpolymerizing for 4-8 hours; and washing with ethanol and deionized water until the filtrate is neutral, and drying the filter cake to obtain the three-dimensional conjugated conductive polyaniline. The invention also provides an in-situ preparation method of the negative electrode material / three-dimensional conjugated conductive polyaniline composite slurry based on the method. The polyaniline prepared in the invention has good bonding capability and conductivity, can be used as a conductive agent and an adhesive at the same time, and can significantly improve the cycle stability of the lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of electrode binder materials, and in particular relates to the synthesis and electrode application of a three-dimensional conjugated conductive polyaniline binder used for lithium-ion battery negative electrodes. Background technique [0002] With the development of society, lithium-ion batteries have been widely used in mobile electronic devices, electric vehicles, grid energy storage and other fields due to their advantages such as high energy density, high working voltage and long cycle life. However, the rapid development of the new energy industry has also put forward higher requirements for the performance of lithium-ion batteries. The current commercial anode materials have gradually shifted from graphite, hard carbon, and soft carbon to silicon-carbon composite anode material systems to further meet the needs of lithium-ion batteries. Battery performance requirements for higher specific energy and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02H01M4/62H01M10/0525
CPCC08G73/0266H01M4/622H01M4/624H01M10/0525Y02E60/10
Inventor 刘慰何晓英陈云贵
Owner 四川普利司德高分子新材料有限公司