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Gel electrolyte composition and preparation method thereof, gel electrolyte and preparation method and application of gel electrolyte

A gel electrolyte and composition technology, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as inability to fix phosphate esters, pollution of the working environment, etc., to reduce the risk of battery leakage, improve safety performance, The effect of flame retardant conductivity

Pending Publication Date: 2021-11-30
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot fix the phosphate ester free in the electrolyte. After the cell is damaged, the electrolyte will still flow out of the cell, causing pollution to the working environment.

Method used

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  • Gel electrolyte composition and preparation method thereof, gel electrolyte and preparation method and application of gel electrolyte
  • Gel electrolyte composition and preparation method thereof, gel electrolyte and preparation method and application of gel electrolyte
  • Gel electrolyte composition and preparation method thereof, gel electrolyte and preparation method and application of gel electrolyte

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preparation example Construction

[0049] According to another aspect of the present invention, the present invention also relates to a method of preparing the gel electrolyte composition, comprising the steps of:

[0050] The components are mixed.

[0051] Gel electrolyte composition of the present invention, the components are evenly mixed.

[0052] According to another aspect of the present invention, the present invention also relates to a method for preparing the gel electrolyte, comprising the steps of:

[0053] The gel electrolyte composition was subjected to polymerization reaction under heating.

[0054] The method of preparing the gel electrolyte of the present invention is simple, the gel electrolyte composition is heated to obtain a gel electrolyte.

[0055] Preferably, the gel electrolyte composition or glass containers for the polymerization reaction in the cell.

[0056] Preferably, the container comprises a glass vial.

[0057] In one embodiment, the gel electrolyte composition of the present inventi...

Embodiment 1

[0074] A method of preparing a gel electrolyte, comprising the steps of:

[0075] Under (a) room temperature, of EC, EMC and DMC were mixed, wherein the mass ratio of EC, EMC, and DMC was 1: 1: 1, followed by addition of a certain amount of initiator azobisisobutyronitrile and LiPF 6 After dissolved completely, adding a first polymerizable monomer and a second polymerizable monomer DMVP PEGDA, wherein the molar ratio of the two monomers was 1: 1, a first polymerizable monomer and a second polymerizable monomer with the total mass of the solvent the total mass ratio of 35:65, uniformly mixed to obtain a gel electrolyte composition;

[0076] Obtained in (b) of step (a) gel electrolyte composition was placed in a glass bottle and placed in an oven at 80 deg.] C to give a gel electrolyte after the reaction was 10h.

Embodiment 2

[0078] A method of preparing a gel electrolyte, comprising the steps of:

[0079] Under (a) room temperature, the solvent EC, EMC and DMC were mixed, wherein the mass ratio of EC, EMC, and DMC was 2: 5: 3, followed by addition of a certain amount of initiator azobisisobutyronitrile heptonitrile and LiPF 6 After dissolved completely, adding a first polymerizable monomer and a second polymerizable monomer DMVP PEGDA, wherein the molar ratio of the two monomers is 0.5: 1, a first polymerizable monomer and a second polymerizable monomer with the total mass of the solvent the total mass ratio of 40:60, uniformly mixed to obtain a gel electrolyte composition;

[0080] Obtained in (b) of step (a) gel electrolyte composition was placed in a glass bottle and placed in an oven at 65 deg.] C to give a gel electrolyte after the reaction 6h.

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Abstract

The invention relates to the technical field of lithium batteries, in particular to a gel electrolyte composition and a preparation method thereof, a gel electrolyte and a preparation method and application of the gel electrolyte. The gel electrolyte composition comprises a first polymeric monomer, a second polymeric monomer, a lithium salt, an initiator and a solvent; the first polymeric monomer comprises at least one of methyl methacrylate, styrene, vinyl acetate, acrylonitrile, fluorinated acrylate, polyethylene glycol diacrylate and polyethylene glycol acrylate; and the second polymeric monomer comprises a phosphate ester substance containing a carbon-carbon double bond and / or a carbon-nitrogen triple bond. The gel electrolyte composition provided by the invention can be used for preparing gel electrolyte with excellent conductivity and flame retardance. The flame-retardant phosphate monomer is introduced into a polymer framework, so that the risk of battery liquid leakage can be greatly reduced, the obtained gel electrolyte has the characteristics of flame retardance and high conductivity, and the safety performance of the battery is improved.

Description

Technical field [0001] The present invention relates to the technical field of lithium batteries, in particular, it relates to a gel composition and its preparation method, the gel electrolyte and the electrolyte preparation method and application. Background technique [0002] Lithium-ion batteries (LIBs) having high energy density, high operating voltage, long cycle life and environment-friendly features. Battery manufacturer layer by layer from the selection and optimization of materials, electrodes, batteries, modules and Pack, development and manufacture of cell products to meet customer demand. Traditional lithium-ion battery is a liquid system, we are facing many security risks in long-term use, such as dry electrolyte leakage and contamination caused by fire, or even explode. Researchers generally used locally too thick / or high concentrations of added phosphate electrolyte / fluorinated additive in the electrolyte, the electrolytic solution addressing security issues fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/14C08F230/02C08F220/22C08F212/08H01M10/0565H01M10/0525
CPCC08F283/065C08F220/14C08F230/02C08F220/22H01M10/0565H01M10/0525C08F212/08C08F220/44Y02E60/10
Inventor 李晓龙宋文锋王鹏
Owner SVOLT ENERGY TECHNOLOGY CO LTD