Polymer solid electrolyte membrane and its preparation method and all-solid-state battery

A technology of solid electrolyte membrane and polymer, applied in the direction of nonaqueous electrolyte batteries, solid electrolytes, nonaqueous electrolytes, etc., can solve the problem of low room temperature conductivity, achieve high room temperature ion conductivity, improve safety and service life, The effect of improving ionic conductivity

Active Publication Date: 2021-08-13
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the above-mentioned problems in the prior art, the present invention provides a polymer solid-state electrolyte membrane with high ionic conductivity at room temperature and a preparation method thereof, which is suitable for all-solid-state batteries. The polymer solid-state electrolyte membrane effectively solves the problem of Due to the low room temperature conductivity of existing solid electrolytes, all solid-state batteries assembled with this electrolyte membrane can work at room temperature

Method used

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  • Polymer solid electrolyte membrane and its preparation method and all-solid-state battery
  • Polymer solid electrolyte membrane and its preparation method and all-solid-state battery
  • Polymer solid electrolyte membrane and its preparation method and all-solid-state battery

Examples

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Effect test

Embodiment 1

[0043] A polymer solid electrolyte membrane, the preparation method of which comprises the steps of:

[0044] (1) Take 440.4 mg of methoxypolyethylene glycol acrylate (PEO macromer) with a molecular weight of 750 Da, 145.2 mg of 8-acrylic cage polysilsesquioxane (crosslinking agent), 4.4 mg 2-Hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (free radical initiator), 878.4 mg polyethylene glycol methyl ether with a molecular weight of 750 Da (PEO linear molecular chain), 432.0 mg LiN(SO 2 CF 3 ) 2 (Lithium salt) into a reaction flask, add 2 ml of tetrahydrofuran to dissolve, and stir for 30 minutes under the protection of an inert atmosphere to mix well.

[0045] (2) Take 2.5 ml of the mixture prepared in step (1) and spread it evenly to an area of ​​100 cm 2 On the polytetrafluoroethylene mold, use ultraviolet light to irradiate the surface of the mold coated with the reaction solution, irradiate for 20 minutes, let it stand for 8 hours, and dry it in vacuum at 25 ° C fo...

Embodiment 2

[0047] A polymer solid electrolyte membrane, the preparation method of which comprises the steps of:

[0048] (1) Take 110.1 mg of methoxypolyethylene glycol acrylate (PEO macromer) with a molecular weight of 750 Da, 36.3 mg of 8-acrylic cage polysilsesquioxane (crosslinking agent), 1.1 mg 2-Hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (free radical initiator), 219.6 mg polyethylene glycol methyl ether with a molecular weight of 750 Da (PEO linear molecular chain), 108.0 mg LiN(SO 2 CF 3 ) 2 (Lithium salt) in a reaction bottle, add 500 μl tetrahydrofuran to dissolve, and stir for 30 minutes under the protection of an inert atmosphere to mix well.

[0049] (2) Take 50 μl of the mixture prepared in step (1) and spread evenly to an area of ​​2 cm 2 On the surface of the lithium metal negative electrode, use ultraviolet light to irradiate the surface of the lithium metal sheet coated with the reaction solution, irradiate for 20 minutes, let it stand for 8 hours, and dry ...

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Abstract

The invention discloses a polymer solid-state electrolyte membrane, a preparation method and an all-solid-state battery. The polymer solid-state electrolyte membrane comprises: a brush-like PEO cross-linked network, a PEO linear molecular chain and lithium salt; the brush-like PEO cross-linked network consists of PEO macromolecules Monomers and crosslinkers are prepared by free radical polymerization. The polymer electrolyte membrane of the present invention has good room temperature conductivity and mechanical strength, can solve the problem of the safety of liquid electrolyte or quasi-solid electrolyte lithium-ion battery and the problem of insufficient room temperature ion conductivity of all solid-state batteries, and can be used for high energy density Lithium metal batteries solve the problem of insufficient safety of high energy density lithium metal batteries, and have considerable application prospects.

Description

technical field [0001] The invention belongs to the field of solid-state electrolytes for all-solid-state batteries, and in particular relates to a polymer solid-state electrolyte, a preparation method thereof, and an all-solid-state battery. Background technique [0002] The survival and development of human beings are inseparable from energy. With the development of social productivity, human demand for energy is growing rapidly. As a new generation of energy storage components, lithium-ion batteries have the advantages of light weight, long cycle life, no memory effect, and no environmental pollution. They have been widely used in electric vehicles, portable electronic equipment, national defense technology and other fields; Lithium metal batteries with high density lithium metal as anode materials have also received more and more attention. [0003] At present, most of the electrolytes used in lithium-ion batteries are liquid electrolytes, which contain a large amount o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/052H01M10/0525
CPCH01M10/052H01M10/0525H01M10/0565H01M2300/0082Y02E60/10
Inventor 周新贵纪小宇郭子豪吴丁财岳衎李始美叶峰孙炼
Owner NAT UNIV OF DEFENSE TECH
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