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Hydrophilic lithium carbonate terpolymer and preparation method thereof

A lithium carbonate terpolymer, hydrophilic technology, applied in the field of hydrophilic lithium carbonate terpolymer and its preparation, lithium ion polymer and its preparation, can solve the problem of weakening the adhesion of polymer materials Solve problems such as force durability, reduce PVDF compatibility, and electrode adhesive layer peeling, so as to ensure mechanical strength and thermal stability, improve hydrophilic performance, and reduce polarization.

Active Publication Date: 2021-02-09
氟金(上海)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, although the addition of a conductive agent can effectively improve the electrochemical performance of the material, it will reduce the compatibility of PVDF with other materials, weaken the bonding force of the polymer material itself and the durability of the bonding force, and cause the electrode adhesive The layer is easily peeled off partly or completely from the current collector, the load characteristics are deteriorated, and problems such as capacity degradation occur

Method used

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  • Hydrophilic lithium carbonate terpolymer and preparation method thereof
  • Hydrophilic lithium carbonate terpolymer and preparation method thereof
  • Hydrophilic lithium carbonate terpolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The present embodiment provides a kind of hydrophilic lithium carbonate terpolymer.

[0077] It should be noted:

[0078] The monomer compounds involved in this example are all commercially available.

[0079] A kind of hydrophilic lithium carbonate terpolymer provided by the present embodiment comprises:

[0080] Polyvinylidene fluoride structural unit (A) composed of x molar parts of vinylidene fluoride monomer, vinylpyrrolidone structural unit (B) composed of y molar parts of vinylpyrrolidone monomer and z molar parts of vinyl-alkyl lithium carbonate unit The vinyl-alkyl lithium carbonate structural unit (C) three kinds of compound structural units of the copolymer formed by body composition; And

[0081] The copolymer has the following general structural formula:

[0082]

[0083] in:

[0084] The respective mole fractions of polyvinylidene fluoride structural unit, vinylpyrrolidone structural unit and vinyl-alkyllithium carbonate structural unit are respecti...

Embodiment 2

[0099] The present embodiment provides a kind of preparation method of hydrophilic lithium carbonate terpolymer.

[0100] It should be noted:

[0101] The reaction device, monomer compound, vinyl-alkyllithium carbonate structural unit, initiator, emulsifier, demulsifier, and organic solvent involved in this example are all commercially available.

[0102] A kind of preparation method of hydrophilic lithium carbonate terpolymer, comprises the steps:

[0103] In the reaction device, vinylidene fluoride monomer, vinylpyrrolidone monomer, vinyl-alkyl lithium carbonate monomer and initiator are respectively added, and a hydrophilic lithium carbonate terpolymer is produced by copolymerization by a polymerization reaction method;

[0104] Its reaction formula is:

[0105]

[0106] Further, in the above preparation method:

[0107] The reaction device is a high-pressure reactor;

[0108] The step of adding vinylidene fluoride monomer, vinylpyrrolidone monomer, vinyl-alkyllithiu...

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Abstract

The invention relates to a hydrophilic lithium carbonate terpolymer and a preparation method thereof. The hydrophilic lithium carbonate terpolymer comprises a polyvinylidene fluoride structural unit composed of vinylidene fluoride monomers, a vinyl pyrrolidone structural unit composed of vinyl pyrrolidone monomers and a vinyl-alkyl lithium carbonate structural unit. The preparation method comprises the following steps: respectively adding the vinylidene fluoride monomers, the vinyl pyrrolidone monomers, the vinyl-alkyl lithium carbonate monomers and an initiator into a reaction device, and conducting copolymerizing by adopting a polymerization reaction method. According to the invention, the structural advantages of polyvinylidene fluoride are retained, the defects of polyvinylidene fluoride are overcome, and thermal stability is improved; the crystallinity, the ion conductivity and the ion migration rate of the copolymer can be effectively regulated and controlled by regulating and controlling the proportions of ion structure units, so the purpose of optimizing ion transmission is achieved; hydrophilic groups are introduced to improve hydrophilicity, so the adsorption capacity ofthe electrolyte and the migration rate of lithium ions are improved; and the physical and chemical properties of the copolymer can be effectively regulated.

Description

technical field [0001] The invention relates to a lithium ion polymer and a preparation method thereof, in particular to a hydrophilic lithium carbonate terpolymer and a preparation method thereof, belonging to the technical field of lithium ion polymer battery production and manufacture. Background technique [0002] Lithium-ion polymer batteries have the characteristics of small size, light weight, high energy density, small self-discharge, no memory effect, good safety performance, and can be made into any shape. [0003] Because the existing lithium-ion rechargeable battery has a lot of electrolyte and high flammability, it is difficult to guarantee safety. However, the lithium-ion polymer rechargeable battery uses porous polymer materials as the electrolyte, which reduces the electrolyte, so it is not easy to leak , can ensure its safety, so it has become the most advanced rechargeable battery today, and the world's major scientific and technological powers are currentl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/22C08F226/10C08F220/04
CPCC08F214/225C08F226/10C08F220/04
Inventor 景浩
Owner 氟金(上海)新材料有限公司
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