Conductive polymer binder and preparation method and applications thereof

A technology of conductive polymers and binders, which is applied in circuits, electrical components, battery electrodes, etc., can solve the problems of no conductivity and low bonding strength, and achieve improved cycle stability, good affinity, and improved Effect of rate and low temperature performance

Active Publication Date: 2019-08-16
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low bonding strength and no conductivity of existing silicon negative electrode binders, and to provide a conductive polymer binder and its preparation method and application. Cycle Life and Kinetic Performance of Ion Batteries

Method used

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  • Conductive polymer binder and preparation method and applications thereof
  • Conductive polymer binder and preparation method and applications thereof

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Experimental program
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specific Embodiment approach 1

[0016] Specific embodiment one: what this embodiment records is a kind of conductive polymer binder, and described binder is polyvinylpyrrolidone and polyaniline reaction copolymer PVP-PANI, and its chemical structural formula is as follows:

[0017] .

specific Embodiment approach 2

[0018] Specific embodiment two: a kind of conductive polymer adhesive described in specific embodiment one, in described adhesive, the mass proportion of polyaniline in PVP-PANi adhesive is 10%~90%, The preferred ratio is 30%~70%; by controlling the mass ratio of polyaniline below 90%, the water solubility and bonding strength of the binder can be guaranteed, and if it is controlled above 10%, it can ensure that the binder has good electronic conductivity. Generality. The molecular weight of PVP is 1,000-3,000,000, preferably 10,000-100,000. By controlling the molecular weight of PVP within the above range, it can ensure that the prepared adhesive has good bonding strength.

specific Embodiment approach 3

[0019] Embodiment 3: An application of the conductive polymer binder described in Embodiment 1 or Embodiment 2. The conductive polymer binder is used in silicon-based negative electrodes of lithium-ion batteries.

[0020] Specific embodiment three: a preparation method of the conductive polymer binder described in specific embodiment one or two, the method is specifically: dissolving PVP in the reaction medium, adding the distilled aniline monomer, and continuing to stir , Initiate polymerization under the action of an initiator to generate dark green solution, filter and wash to obtain PVP-PANI dark green powder.

[0021] Embodiment 5: In the method for preparing a conductive polymer binder described in Embodiment 4, the reaction medium is at least one of hydrochloric acid and anhydrous acetic acid, preferably anhydrous acetic acid.

[0022] Specific embodiment six: the preparation method of a kind of conductive polymer binder described in specific embodiment four, described ...

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Abstract

The invention discloses a conductive polymer binder and a preparation method and applications thereof, and belongs to the technical field of lithium ion batteries. The preparation method comprises following steps: dissolving PVP into a reaction medium; adding steamed aniline monomers, keeping on stirring, carrying out polymerization under the action of an initiator to generate a dark green solution, filtering, and washing to obtain PVP-PANI dark green powder. The conductive polymer binder is applied to the silicon base negative pole of a lithium ion battery. The provided conductive polymer binder has the advantages that the multiplying power and low temperature performance of a battery can be improved; the binder has a large amount of carbonyl groups and lactam polar groups and thus is affinity with carbonate electrolyte; due to good electron conductivity of PANI, the dynamic performance of a battery core is obviously enhanced; and the multiplying power and low temperature performanceof the battery core are greatly strengthened.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a conductive polymer binder and a preparation method and application thereof. Background technique [0002] In recent years, with the increasing popularity of new energy vehicles and the rapid development of electronic devices such as notebook computers and smart phones, the development and progress of lithium-ion battery technology as the core of energy supply has been driven, and more and more advanced lithium-ion battery technology has been proposed. There are higher requirements, such as higher energy density, faster charging and discharging speed, better battery life and more relaxed use environment. [0003] In order to develop rechargeable lithium-ion batteries with high energy density, adding silicon materials with a theoretical gram capacity of up to 42mAh / g to the negative electrode is the current main research direction. However, due to the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02H01M4/62H01M10/0525
CPCC08G73/0266H01M4/622H01M10/0525Y02E60/10
Inventor 陈伟平李素丽王海李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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