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Polymer solid electrolyte membrane as well as preparation method and application thereof

A solid electrolyte membrane and polymer technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of low conductivity of solid electrolyte materials, low lithium ion conductivity, poor high-voltage stability, etc., and achieve excellent high-voltage stability And the effect of cycle stability, high lithium ion conductivity, and small changes in production process

Active Publication Date: 2021-04-16
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conductivity of the solid electrolyte material it uses is low, making its battery rate performance much lower than that of liquid batteries.
[0006] The above schemes have problems such as poor high-voltage stability, low lithium ion conductivity, or poor safety. Therefore, it is necessary to develop a solid-state electrolyte with high conductivity, good high-voltage stability, and high safety performance.

Method used

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  • Polymer solid electrolyte membrane as well as preparation method and application thereof
  • Polymer solid electrolyte membrane as well as preparation method and application thereof
  • Polymer solid electrolyte membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment provides a polymer solid electrolyte membrane, which is prepared by the following method:

[0055] (1) At room temperature, the monomers PES, VC, PEGMEMA, and TMPTA were mixed in a mass ratio of 1:2:0.1:0.1 to form a dilute solution, and then 2% of the total mass of the dilute solution was added AIBN and 15% of LiTFSI and 3% SN, keep stirring to form a homogeneous precursor solution;

[0056] (2) Place the non-woven fabric base film flat on the surface of the polytetrafluoroethylene flat plate and fix it, apply the precursor solution obtained in step (1) evenly on the non-woven fabric, and then cover another polytetrafluoroethylene plate on the The surface was fixed, and the whole was sealed in an aluminum-plastic film bag, placed in a 60°C oven for 24 hours, then taken out, the tetrafluoroethylene plate was removed, and kept in a 60°C vacuum oven for 24 hours to obtain the polymer solid electrolyte membrane.

[0057] The cross-sectional view of the pol...

Embodiment 2

[0062] This embodiment provides a polymer solid electrolyte membrane, which is prepared by the following method:

[0063] (1) At room temperature, mix the monomers PES, VC, PEGMEMA, and TMPTA at a mass ratio of 1:0.25:0.06:0.06 to form a dilute solution, and then add 2% AIBN and 15% LiTFSI to the total mass of the dilute solution in sequence and 3% SN, keep stirring to form a homogeneous precursor solution;

[0064] (2) Place the non-woven fabric base film flat on the surface of the polytetrafluoroethylene flat plate and fix it, apply the precursor solution obtained in step (1) evenly on the non-woven fabric, and then cover another polytetrafluoroethylene plate on the The surface was fixed, and the whole was sealed in an aluminum-plastic film bag, placed in a 60°C oven for 24 hours, then taken out, the tetrafluoroethylene plate was removed, and kept in a 60°C vacuum oven for 24 hours to obtain the polymer solid electrolyte membrane.

Embodiment 3

[0066] The only difference between this embodiment and Embodiment 1 is that PES:VC=1:4, and other conditions and parameters are completely the same as Embodiment 1.

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Abstract

The invention provides a polymer solid electrolyte membrane as well as a preparation method and application thereof. The solid electrolyte membrane comprises a polymer matrix, a lithium salt and a plasticizer, wherein the molecular chain of the polymer matrix comprises four components: a main monomer for providing a lithium ion transmission channel, a high-pressure stabilizer for providing high-pressure stability, a softening agent for improving the flexibility of a polymer chain, and a cross-linking agent for improving the mechanical strength. The polymer solid electrolyte membrane has relatively high lithium ion conductivity, excellent high-voltage stability and cycling stability, and can be widely applied to polymer all-solid-state batteries.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and relates to a polymer solid electrolyte membrane, a preparation method and application thereof. Background technique [0002] At present, lithium-ion batteries have the highest energy density among commercial batteries, and are widely used in various small electronic products and electric vehicles. In recent years, the rapid development of electric vehicles and energy storage industries has put forward higher requirements on the energy density, cost and safety of lithium-ion batteries. Commercial lithium-ion batteries rely on the use of organic electrolytes, and the low-flash point solvents in organic electrolytes often cause many safety issues, such as battery combustion and explosion. [0003] In order to solve the safety problem of lithium-ion batteries, solid-state batteries that do not contain liquid components have been vigorously developed. Solid-state batteries rely on solid-stat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525C08F290/06C08F228/06C08F234/02C08F222/20C08F222/34
CPCY02E60/10
Inventor 王鹏吕文彬李晓龙宋文锋陈少杰
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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