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Lithium carbonate ion-containing copolymer and preparation method thereof

A technology of ionic copolymer and lithium carbonate, which is applied in the field of lithium carbonate-containing ion copolymer and its preparation, lithium ion polymer and its preparation, to improve mechanical properties, avoid the use of emulsifier, and regulate the effect of ion conductivity

Active Publication Date: 2022-06-24
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

[0015] However, due to the introduction of a large number of carbon-hydrogen bonds (C-H) in the above-mentioned copolymerization process, its stability is not as high as the carbon-fluorine bond (C-F) in the PVDF structure. Therefore, the chemical stability and other properties of the copolymer obtained in this way are better. Lower than the corresponding index of PVDF homopolymer

Method used

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  • Lithium carbonate ion-containing copolymer and preparation method thereof
  • Lithium carbonate ion-containing copolymer and preparation method thereof
  • Lithium carbonate ion-containing copolymer and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0080] This embodiment provides a lithium carbonate ion-containing copolymer.

[0081] A kind of lithium carbonate ion-containing copolymer provided by the present embodiment is to include:

[0082] The polyvinylidene fluoride structural unit (A) composed of x mole parts of vinylidene fluoride monomer, the acrylate structural unit (B) composed of y mole parts of acrylate monomer, and the vinyl group composed of z mole parts of vinyl lithium carbonate monomer Lithium carbonate structural unit (C) a copolymer composed of three compound structural units; and

[0083] The copolymer has the following general structural formula:

[0084]

[0085] in:

[0086] In the acrylate structural unit, which:

[0087] R is H or CH 3 , m≥0;

[0088] In the vinyl lithium carbonate structural unit, which:

[0089] n≥1;

[0090] The respective molar fractions of the polyvinylidene fluoride structural unit, the acrylate structural unit and the vinyl lithium carbonate structural unit are: ...

Embodiment 2

[0103] This embodiment provides a preparation method of a lithium carbonate ion-containing copolymer.

[0104] A preparation method of a lithium carbonate ion-containing copolymer provided by the present embodiment comprises the following steps:

[0105] In the reaction device, vinylidene fluoride monomer, acrylate monomer and vinyl lithium carbonate monomer were added according to the respective molar fractions of polyvinylidene fluoride structural unit, acrylate structural unit and vinyl lithium carbonate structural unit, and the initiator agent, adopt the polymerization reaction method to make the described lithium carbonate ion-containing copolymer by copolymerization, and its reaction formula is:

[0106]

[0107] Further, in the above-mentioned preparation method:

[0108] The reaction device is an autoclave;

[0109] In the step of adding vinylidene fluoride monomer, acrylate monomer, vinyl lithium carbonate monomer and initiator respectively, it specifically inclu...

example 1

[0140] In an autoclave with a tolerance of 10MPa, the structural formula of CH is added. 2 =CH-COO(CH 2 ) 2 -CH 3 of acrylate monomers, and the structural formula CH 2 =CH-C 2 H 4 -COOLi + The vinyl lithium carbonate monomer and benzoyl peroxide initiator are repeatedly evacuated to remove oxygen, and then, under a nitrogen atmosphere, the structural formula is CH 2 =CF 2 of vinylidene fluoride gas;

[0141] in:

[0142] by the structural formula CH 2 =CF 2 The polyvinylidene fluoride structural unit composed of the vinylidene fluoride gas, the structural formula is CH 2 =CH-COO(CH 2 ) 2 -CH 3 The acrylate monomers are composed of acrylate structural units, and the structural formula is CH 2 =CH-C 2 H 4 -COOLi + The molar fraction ratio of the three vinyl lithium carbonate structural units constituted by the vinyl lithium carbonate monomer is:

[0143] Vinylidene fluoride structural unit: acrylate structural unit: vinyl lithium carbonate structural unit=0.55...

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Abstract

A lithium carbonate ion-containing copolymer and a preparation method thereof, the lithium carbonate ion-containing copolymer includes a polyvinylidene fluoride structural unit, an acrylate structural unit and a vinyl lithium carbonate structural unit; the preparation method comprises: in a reaction device , respectively adding vinylidene fluoride monomer, acrylate monomer, vinyl lithium carbonate monomer and initiator, and one-step copolymerization by polymerization reaction method. The invention retains the advantageous structure of polyvinylidene fluoride, ensures that the copolymer has sufficient mechanical strength and thermal stability, and overcomes the existing problems by introducing efficient lithium ion transport structural units, polar groups and a large number of ultra-stable structural units. The shortcomings of PVDF as a polymer lithium-ion battery material optimize the transmission efficiency of lithium ions, improve the ionic conductivity of lithium batteries, reduce the polarization of the battery during charging, and improve the charge and discharge performance of the battery. The further development and application of lithium batteries provides new materials and methods.

Description

technical field [0001] The invention relates to a lithium ion polymer and a preparation method thereof, in particular to a lithium carbonate ion-containing copolymer and a preparation method thereof, belonging to the technical field of lithium ion polymer battery production and manufacture. Background technique [0002] The polymer lithium-ion battery has 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. It has become the most advanced rechargeable battery today. At present, the world's major technology Powerful countries are conducting vigorous research and development. [0003] Lithium polymer batteries are mainly composed of positive electrodes, negative electrodes, and separator paper. In the currently developed lithium polymer batteries, polymer materials are mainly used in positive electrodes and electrolytes. [0004] The polymer material polyvinyliden...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/22C08F220/18C08F218/00H01M10/0525H01M10/0565
CPCC08F214/225H01M10/0525H01M10/0565H01M2300/0025C08F218/24C08F220/1802C08F220/1803C08F220/1804C08F220/1805Y02E60/10
Inventor 景浩
Owner 氟金(上海)新材料有限公司
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