Grafting type comb polymer solid electrolyte material and preparation method thereof

A comb-like polymer and solid electrolyte technology, which is applied in the direction of solid electrolyte, non-aqueous electrolyte, electrolyte immobilization/gelation, etc., can solve the problems of reduced mechanical properties, easy tearing, and high viscosity of polymer electrolytes, and achieve improved Electrochemical stability and ionic conductivity, improving exercise ability, and avoiding the effect of easy leakage

Inactive Publication Date: 2015-12-30
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the ionic liquid is not volatile and has a high viscosity, the surface of the prepared electrolyte film is not smooth, and the drying treatment is not complete, because the introduction of the small molecule ionic liquid, as the content of the ionic liquid increases, the mechanical properties of the polymer electrolyte decrease and it is easy to tear

Method used

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  • Grafting type comb polymer solid electrolyte material and preparation method thereof
  • Grafting type comb polymer solid electrolyte material and preparation method thereof
  • Grafting type comb polymer solid electrolyte material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1～6

[0046] (1) Weigh the epoxidized natural rubber of the polymer matrix and dissolve it in the mixed solvent. After swelling, continue to add the mixed solvent and magnetically stir until it dissolves into a uniform solution;

[0047] (2) Dissolve methoxypolyethylene glycol carboxylic acid in tetrahydrofuran solution according to the formula and stir magnetically for 0.5h, then transfer to the solution obtained in step (1), and react the resulting mixed solution in an oil bath at 100°C for 5 hours Hours;

[0048] (3) adding an appropriate amount of lithium salt to the mixed solution prepared by the reaction of claim (2), and magnetic stirring for 10 hours to obtain a uniform and transparent mixed solution;

[0049] (4) casting the mixed solution of claim (3) gained in the polytetrafluoroethylene mould, volatilized naturally in fume hood for 12 hours, then transferred to dry in vacuum oven to obtain film, which is graft type comb polymerization solid electrolyte material.

[0050]...

Embodiment 7

[0063] This embodiment is basically the same as Embodiment 1, except that the amount of lithium perchlorate added is 300 mg. The prepared ENR / PEG-COOH comb-like polymer electrolyte film has electrochemical stability and high conductivity.

Embodiment 8

[0065] This embodiment is basically the same as Embodiment 1, except that the addition of lithium perchlorate is 500 mg. The prepared ENR / PEG-COOH comb-like polymer electrolyte film has electrochemical stability and high conductivity.

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Abstract

The invention relates to a grafting type comb polymer solid electrolyte material and a preparation method thereof. The raw material comprises epoxidized natural rubber, methoxy polyethylene glycol carboxylic acid and lithium perchlorate, a flexible segment is introduced in the epoxidized natural rubber through a grafting reaction, the graft methoxy polyethylene glycol carboxylic acid provides the high segment motion ability and the ability of interaction with lithium salt, and ether oxygen atoms on the graft act with lithium perchlorate to dissociate the lithium perchlorate into lithium ions and form a coordinated complex. Compared with the prior art, no other plasticizer or active agent or vulcanization accelerator or rubber chemical is introduced, no small molecule product residue exists in the prepared material, and the electrochemical stability and ionic conductivity of the electrolyte can be improved.

Description

technical field [0001] The invention relates to polymer electrolytes, in particular to a grafted comb-shaped polymer solid electrolyte material and a preparation method thereof. Background technique [0002] Polymer solid electrolytes (SPE) are mainly formed by mixing polymers and metal salts. Since 1973, polyethylene oxide (PEO)-alkali metal salt ion-conducting polymers were first reported, and PEO-based polymer electrolytes have become the most widely used The most promising and researched system. Polymer electrolyte not only has light weight, easy film formation, viscoelasticity and good stability, but it also overcomes the unsafe characteristics of liquid batteries that are easy to leak and can be made into batteries of any shape and size, and can be made into large-area batteries. Uniform thin film, so that the internal resistance of the battery is greatly reduced, good contact with the electrode in the battery can increase the charge and discharge current, so people h...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0082H01M2300/0085Y02E60/10
Inventor 王冉梅花任文坛张勇
Owner SHANGHAI JIAO TONG UNIV
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