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Gel polymer electrolyte and preparation method thereof

A gel polymer and electrolyte technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, electrolyte immobilization/gelation, etc., can solve the problem of low conductivity

Inactive Publication Date: 2014-03-26
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, gel polymer electrolytes have low conductivity

Method used

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

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preparation example Construction

[0039] see figure 1 , the preparation method of above-mentioned gel polymer electrolyte, comprises the following steps:

[0040] Step S210, dissolving polymethyl methacrylate in an organic solvent and stirring evenly, then adding mesoporous molecular sieve MCM-41, stirring evenly at 30°C to 50°C to form a slurry, wherein polymethylmethacrylate and mesoporous The mass ratio of pore molecular sieve MCM-41 is 20:1~20:3.

[0041] Preferably, the organic solvent is at least one selected from N-methylpyrrolidone (NMP), tetrahydrofuran (THF) and acetonitrile (AN).

[0042] Preferably, the solid-to-liquid ratio of the polymethyl methacrylate to the organic solvent is 1g:4ml~2g:3ml.

[0043] Preferably, the molecular weight of the polymethyl methacrylate is 30,000-300,000.

[0044] Preferably, the particle size of the mesoporous molecular sieve MCM-41 is 3 μm to 10 μm.

[0045] In this embodiment, the mesoporous molecular sieve MCM-41 is prepared by the following steps:

[0046] S...

Embodiment 1

[0068] The preparation method of the gel polymer electrolyte in this embodiment includes the following steps:

[0069] (1) Preparation of mesoporous molecular sieves:

[0070] Weigh 1.2g of CTAB (cetyltrimethylammonium bromide), dissolve it in 11mL of distilled water, and stir at 30°C for 30 minutes, then add 3.8g of ethylenediamine (EDA), and continue stirring to disperse the solution evenly . Then slowly add 1.0g tetraethyl orthosilicate (TEOS), continue to stir for 9 hours, stand at room temperature for 20 hours, filter, wash with water until neutral, and dry at 50°C to obtain the original molecular sieve powder (precursor), and then the obtained molecular sieve original powder Calcined in an air atmosphere at 500°C for 6h to remove the organic template (hexadecyltrimethylammonium bromide) to obtain mesoporous molecular sieves.

[0071] (2) Prepared PMMA-based gel polymer electrolyte modified by mesoporous molecular sieve:

[0072] Dissolve 10g PMMA (molecular weight: 10...

Embodiment 2

[0075] The preparation method of the gel polymer electrolyte in this embodiment includes the following steps:

[0076] (1) Preparation of mesoporous molecular sieves:

[0077] Weigh 1.0g of CTAB (cetyltrimethylammonium bromide), dissolve it in 10mL of distilled water, and stir at 20°C for 100 minutes, then add 3.5g of ethylenediamine (EDA), and continue stirring to disperse the solution evenly . Then slowly add 1.0g tetraethyl orthosilicate (TEOS), continue to stir for 6h, let stand at room temperature for 15h, filter, wash with water until neutral, and dry at 40°C to obtain the original powder of molecular sieve, and then put the obtained original powder of molecular sieve at 400°C Calcined in the air atmosphere for 3h to remove the organic template, that is, to obtain the mesoporous molecular sieve.

[0078] (2) Prepared PMMA-based gel polymer electrolyte modified by mesoporous molecular sieve:

[0079] Dissolve 10g of PMMA (molecular weight: 30,000) in about 15mL of acet...

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Abstract

The invention provides a gel polymer electrolyte which comprises a gel base, a lithium salt adsorbed to the gel base and a solvent, wherein the gel base comprises polymethyl methacrylate and a mesoporous molecular sieve MCM-41 dispersed in the polymethyl methacrylate in a mass ratio of 20:1-20:3; the lithium salt is selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium trifluoromethanesulfonylimide and lithium trifluoromethanesulfonate; the mass ratio of the polymethyl methacrylate to the lithium salt is 18:1-18:3.5; the solvent is formed by mixing ethylene carbonate and methylethyl carbonate; and the mass ratio of the solvent to the polymethyl methacrylate is 1.2:1-0.5:1. The gel polymer electrolyte has higher conductivity. 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 conductivity. Contents of the invention [0003] Based on this, it is necessary to provide a gel polymer electrolyte with high conductivity and a preparation method thereof. [0004] A gel polymer electrolyte, comprising: a gel matrix, a lithium salt adsorbed to the gel matrix, and a solvent, the gel matrix comprising polymethyl methacrylate and dispersed in the polymethyl methacrylate The mesoporous molecular sieve MCM-41...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/058
CPCH01M10/0565H01M10/058H01M2300/0085Y02E60/10Y02P70/50
Inventor 周明杰刘大喜王要兵钟玲珑
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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