Gel polymer electrolyte and preparation method thereof

A gel polymer and electrolyte technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, electrolyte immobilization/gelation, etc., can solve the problems of low tensile strength and easy cracking, and achieve high tensile strength Effect

Inactive Publication Date: 2014-02-12
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, gel polymer electrolytes have low tensile strength and are prone to cracking during use, limiting their applications

Method used

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  • Gel polymer electrolyte and preparation method thereof

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preparation example Construction

[0032] see figure 1 , the preparation method of above-mentioned gel polymer electrolyte, comprises the following steps:

[0033] Step S110, preparing mesoporous molecular sieve SBA-15.

[0034] The preparation of mesoporous molecular sieve SBA-15 comprises the following steps:

[0035] Step S111, dissolving (1,2-ethylene glycol)-propylene glycol-(1,2-ethylene glycol) block copolymer in hydrochloric acid, then adding ethyl orthosilicate dropwise, and stirring for 24 hours The above forms a homogeneous solution, wherein the mass ratio of (1,2-ethylene glycol)-propylene glycol-(1,2-ethylene glycol) block copolymer to tetraethyl orthosilicate is 1:2.

[0036] Preferably, the molecular weight of the (1,2-ethylene glycol)-propylene glycol-(1,2-ethylene glycol) block copolymer is 2000-10000, preferably 5800.

[0037] Preferably, the (1,2-ethylene glycol)-propylene glycol-(1,2-ethylene glycol) block copolymer is dissolved in deionized water and hydrochloric acid with a mass concent...

Embodiment 1

[0056] The preparation method of the gel polymer electrolyte in this embodiment includes the following steps:

[0057] (1) Preparation of mesoporous molecular sieve SBA-15:

[0058] 10g of triblock copolymer P123 (triblock copolymer poly(1,2-ethylene glycol)-block-poly(propylene glycol)-block-poly(1,2-ethylene glycol) , average molecular weight 2000) was dissolved in deionized water (20mL) and hydrochloric acid solution (60mL) with a mass concentration of 20% and stirred evenly. Ethyl orthosilicate (20g) was slowly added dropwise, and the stirring was continued for more than 24h. After a homogeneous solution had formed, acetic acid (5 g) was added and stirring was continued at 40 °C for 24 h. Finally, the reaction solution was transferred into a polytetrafluoroethylene-lined autoclave, then crystallized at 100°C for 48h, cooled, and the obtained crystal product was suction-filtered, washed and dried at 100°C for 24h. Then calcined at 550°C for 4-12 hours to remove the tri-b...

Embodiment 2

[0062] The preparation method of the gel polymer electrolyte in this embodiment includes the following steps:

[0063] (1) Preparation of mesoporous molecular sieve SBA-15:

[0064] 10g of triblock copolymer P123 (triblock copolymer poly(1,2-ethylene glycol)-block-poly(propylene glycol)-block-poly(1,2-ethylene glycol) , average molecular weight 5800) was dissolved in deionized water (20mL) and hydrochloric acid solution (60mL) with a mass concentration of 30% and stirred evenly. Ethyl orthosilicate (20g) was slowly added dropwise, and the stirring was continued for more than 24h. After a homogeneous solution had formed, acetic acid (5 g) was added and stirring was continued at 40 °C for 24 h. Finally, the reaction solution was transferred into a polytetrafluoroethylene-lined autoclave, then crystallized at 100°C for 48h, cooled, and the obtained crystal product was suction-filtered, washed and dried at 100°C for 24h. Then calcined at 550°C for 4-12 hours to remove the tri-b...

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Abstract

A gel polymer electrolyte comprises polymethyl methacrylate, an ionic liquid, a lithium salt and mesoporous molecular sieve SBA-15; the ionic liquid is at least one selected from 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium hexafluorophosphate, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate and 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide; the lithium slat is at least one selected from lithium tetrafluoroborate, lithium hexafluorophosphate, lithium trifluoromethanesulfonate and lithium bis(trifluoromethanesulfonyl)imide; and the mass ratio of polymethyl methacrylate, the ionic liquid, the lithium salt and mesoporous molecular sieve SBA-15 is 1:(0.8-1.5):(0.1-0.3):(0.04-0.08). The gel polymer electrolyte is relatively high in tensile strength. The invention also provides a preparation method of the gel polymer electrolyte.

Description

technical field [0001] The invention relates to a gel polymer electrolyte and a preparation method thereof. Background technique [0002] Gel polymer electrolyte lithium-ion batteries have been valued by researchers because of their safety, no leakage, and low leakage current. Gel polymer electrolyte is a new type of functional polymer material, which can be used as a separator and electrolyte material at the same time, which can make the battery thinner, thereby improving the flexibility of battery design. Currently, gel polymer electrolytes have low tensile strength and are prone to cracking during use, thus limiting their applications. Contents of the invention [0003] Based on this, it is necessary to provide a gel polymer electrolyte with high tensile strength and a preparation method thereof. [0004] A gel polymer electrolyte comprising: [0005] Polymethylmethacrylate; [0006] Ionic liquids selected from 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M10/058H01M2300/0085Y02E60/10
Inventor 周明杰刘大喜王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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