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Gel-type polymer electrolyte and preparation method thereof

A technology of electrolytes and polymers, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as large electrolyte adsorption, reduced electrolyte stability, and complicated preparation processes, and achieves easy film formation and wide electrochemical The effect of stable window and simple operation

Inactive Publication Date: 2012-03-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the gel polymer electrolyte film prepared by this method has a conductivity of 10 at 30°C -3 S / cm or more, but due to the large amount of electrolyte adsorption, it is easy to seep out from the polymer matrix, and it contains residual photoinitiator molecules, which reduces the working stability of the electrolyte, and the preparation process is more complicated.

Method used

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  • Gel-type polymer electrolyte and preparation method thereof
  • Gel-type polymer electrolyte and preparation method thereof
  • Gel-type polymer electrolyte and preparation method thereof

Examples

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Embodiment 1～4

[0034] A preparation method of a gel-type polymer electrolyte, the raw materials of which are composed of the following components: amino-terminated nitrile rubber, epoxidized cyclohexyl polyhedral polysilsesquioxane, lithium perchlorate, 1-butyl-3 - Methylimidazole trifluoromethanesulfonate, wherein the amino-terminated nitrile rubber has an acrylonitrile content of 18 wt%, a Brookfield viscosity of 200,000 cP, an amino equivalent weight of 900, and an amine value of 62.

[0035] The preparation method of gel-type polymer electrolyte comprises the following process steps: according to the formula of table 1, amino-terminated nitrile rubber, lithium perchlorate, epoxidized cyclohexyl polyhedral polysilsesquioxane and 1-butyl-3 - Methylimidazole trifluoromethanesulfonate was magnetically stirred in 30 parts of tetrahydrofuran for 30 minutes to obtain a uniform and transparent mixed solution, which was cast into a polytetrafluoroethylene mold. After the tetrahydrofuran was comple...

Embodiment 5

[0047] A preparation method of a gel-type polymer electrolyte, the raw materials of which are composed of the following components: amino-terminated nitrile rubber, epoxidized cyclohexyl polyhedral polysilsesquioxane, lithium trifluoromethanesulfonate, 1-butyl - 3-methylimidazolium trifluoromethanesulfonate, wherein the amino-terminated nitrile rubber has an acrylonitrile content of 10 wt%, a Brookfield viscosity of 180,000 cP, an amino equivalent weight of 1200, and an amine value of 47.

[0048] The preparation method of the gel-type polymer electrolyte comprises the following process steps: 1 part of amino-terminated nitrile rubber, 0.2 part of lithium trifluoromethanesulfonate, 0.2 part of epoxidized cyclohexyl polyhedral polysilsesquioxane, 0.2 part 1-butyl-3-methylimidazole trifluoromethanesulfonate was magnetically stirred in 30 parts of tetrahydrofuran for 30 minutes to obtain a uniform and transparent mixed solution, which was cast into a polytetrafluoroethylene mold. ...

Embodiment 6

[0050] A preparation method of a gel-type polymer electrolyte, the raw materials of which are composed of the following components: amino-terminated nitrile rubber, epoxidized cyclohexyl polyhedral polysilsesquioxane, lithium bistrifluoromethanesulfonimide, 1 - Butyl-3-methylimidazolium trifluoromethanesulfonate, wherein the amino-terminated nitrile rubber has an acrylonitrile content of 26 wt%, a Brookfield viscosity of 500,000 cP, an amino equivalent weight of 700, and an amine value of 80.

[0051] The preparation method of the gel-type polymer electrolyte comprises the following process steps: 1 part of amino-terminated nitrile rubber, 0.6 part of lithium bistrifluoromethanesulfonimide, 0.05 part of glycidyl ether polyhedral polysilsesquioxane, 1 part One part of 1-butyl-3-methylimidazole trifluoromethanesulfonate was magnetically stirred in 30 parts of tetrahydrofuran for 30 minutes to obtain a uniform and transparent mixed solution, which was cast into a polytetrafluoroet...

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Abstract

The invention relates to a gel-type polymer electrolyte and a preparation method thereof. The gel-type polymer electrolyte membrane is prepared by using amine terminated nitrile rubber as a matrix of the solid electrolyte, dissolving the matrix, lithium salt, epoxidized polysilsesquioxane, and 1-butyl-3-methylimidazolium trifluoro methane sulfonate in an organic solvent, pouring the solvent on a teflon template, and carrying out heat treatment in a baking oven after volatilizing tetrahydrofuran. Compared with the prior art, the operation is simple; the membrane forming is easy; and the prepared membrane is smooth and uniform, has good mechanical properties, high room-temperature conductivity, and stable electrochemical window, and the prepared membrane used as solid electrolyte materials for the lithium ion battery has an application prospect.

Description

technical field [0001] The invention relates to an electrolyte in the technical field of lithium ion batteries and a preparation method thereof, in particular to a gel-type polymer electrolyte and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high output voltage, high output power, low self-discharge, wide operating temperature range, and fast charging and discharging speed. Therefore, lithium-ion batteries are widely used in consumer electronics, aviation and military products, etc. At present, the electrolytes used in lithium-ion batteries are basically organic solvent electrolytes containing lithium salts, which often cause safety problems such as leakage, flammability, and explosion. Therefore, gel-type polymer electrolytes with higher safety are used as traditional electrolytic electrolytes. Liquid substitutes have attracted the attention of researchers. [0003] Gel-type polymer electrolyt...

Claims

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Application Information

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IPC IPC(8): H01M10/0565
CPCY02E60/10
Inventor 李明任文坛张勇
Owner SHANGHAI JIAO TONG UNIV
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