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Composite gel polymer electrolyte membrane and application thereof

A technology of electrolyte membrane and composite gel, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of poor mechanical and mechanical strength and heat resistance, improve mechanical and mechanical strength and heat resistance, and improve the interface effect. The effect of strength, good compatibility

Active Publication Date: 2011-04-06
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is: in view of the defects of poor mechanical strength and heat resistance of the gel-type polymer electrolyte membrane, firstly, a kind of polymer graft coating layer on the outer surface is designed and synthesized, and the inner surface remains Core-shell ordered mesoporous silica composite particles with an ordered mesoporous structure, on this basis, are used to fill and modify the gel-type polymer electrolyte membrane to develop a high room temperature ionic conductivity and at the same time High-performance composite gel-type polyelectrolyte membrane with good mechanical strength and heat resistance

Method used

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  • Composite gel polymer electrolyte membrane and application thereof
  • Composite gel polymer electrolyte membrane and application thereof
  • Composite gel polymer electrolyte membrane and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1, Comparative Examples 1-2

[0042] 1. Sample preparation

[0043] (1) The preparation of embodiment 1 sample is carried out according to following steps and technology:

[0044] Step 1: Dissolve 1.0 g of cetyltrimethylammonium bromide in 500 mL of distilled water, then add 4 mL of NaOH (2M) into the solution. Gradually raise the temperature to 80° C., drop 20 mL of ethyl orthosilicate into the above solution, and continue to stir and react at constant temperature for 4 h. After the end, the solvent was removed by centrifugation, and the obtained precipitate was repeatedly washed with methanol, and dried in vacuum at 60° C. for 8 hours to obtain white powder A.

[0045] Step 2: Add 4.0g of powder A and 11.5mL of coupling agent γ-aminopropyltriethoxysilane into 600mL of toluene, ultrasonically oscillate for 10min, then gradually raise the temperature to reflux, and continue stirring for 20h. After the reaction, the solvent was removed by centrifugation, an...

Embodiment 2

[0066] Embodiment 2, Comparative Examples 2-3

[0067] 1. Sample preparation

[0068] (1) The preparation of embodiment 2 sample is carried out according to following steps and technology:

[0069] The 1st~5 step technology are with embodiment 1.

[0070] Step 6: Add powder E, plasticizer propylene carbonate, and lithium perchlorate into the polymethyl methacrylate matrix, and prepare a composite gel-type polymer electrolyte membrane through a solution-casting process. The distribution ratio of each component: the mass ratio of the plasticizer to the matrix is ​​30:100, the mass ratio of the lithium salt to the matrix is ​​50:100, and the mass ratio of the powder E to the matrix is ​​10:100. Preparation process: first dissolve the polymer matrix in THF to prepare a uniform polymer solution I (concentration is 40% by mass); then add plasticizer, lithium salt and powder E in THF in proportion, and use ultrasound to It was uniformly dispersed, and the solvent was further remov...

Embodiment 3， comparative example 2、4

[0084] 1. Sample preparation

[0085] (1) The preparation of embodiment 3 sample is carried out according to following steps and technology:

[0086] The 1st~5 step technology are with embodiment 1.

[0087]Step 6: Add powder E, plasticizer propylene carbonate, and lithium perchlorate into the polymethyl methacrylate matrix, and prepare a composite gel-type polymer electrolyte membrane through a solution-casting process. The distribution ratio of each component: the mass ratio of the plasticizer to the matrix is ​​30:100, the mass ratio of the lithium salt to the matrix is ​​50:100, and the mass ratio of the powder E to the matrix is ​​15:100. Preparation process: first dissolve the polymer matrix in THF to prepare a uniform polymer solution I (concentration is 40% by mass); then add plasticizer, lithium salt and powder E in THF in proportion, and use ultrasound to It was uniformly dispersed, and the solvent was further removed by vacuum drying to obtain composite powder II....

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Abstract

The invention discloses a composite gel polymer electrolyte membrane and application thereof. The composite gel polymer electrolyte membrane is prepared by adding core-shell ordered mesoporous silica composite particles into a conventional gel polymer electrolyte system, wherein the adding mass of the core-shell ordered mesoporous silica composite particles is 5 to 30 percent based on the mass ofa polymer matrix in the conventional gel polymer electrolyte system; the core-shell ordered mesoporous silica composite particles take ordered mesoporous silica particles as cores; a polymer is grafted and coated on the outside surfaces of the ordered mesoporous silica particles to form shells; and the shell polymer has good compatibility with the polymer matrix in the conventional gel polymer electrolyte system. The composite gel polymer electrolyte membrane prepared in the invention has higher room-temperature ionic conduction capacity, simultaneously has better mechanical strength and heatresistance, and is suitable for polymer lithium ion batteries.

Description

technical field [0001] The invention relates to a gel type polymer electrolyte membrane and its application in lithium ion batteries. Background technique [0002] Polymer electrolyte membrane is an important component of polymer lithium-ion batteries. With the deepening of various applications of polymer lithium-ion batteries, people are putting forward higher and higher requirements for the performance of polymer electrolyte membranes. The development of comprehensive performance Excellent polymer electrolyte membranes are of great significance for the development of this field. [0003] In order to effectively improve various properties of polymer electrolyte membranes, such as room temperature ionic conductivity, mechanical and mechanical strength, heat resistance, dimensional stability, and electrochemical stability window, a series of modification ideas for polymer electrolyte membranes have been developed so far. and methods. Among them, the idea of ​​using low-mole...

Claims

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Application Information

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IPC IPC(8): H01M10/0565C08F292/00C08L51/10C08J5/18
CPCY02E60/12Y02E60/10
Inventor 徐立新徐峰钟明强
Owner ZHEJIANG UNIV OF TECH
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