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A kind of polymer gel electrolyte and its preparation method and application

A gel electrolyte and polymer technology, which is applied in the direction of composite electrolyte, electrolyte battery manufacturing, non-aqueous electrolyte battery, etc., can solve the problems of low room temperature conductivity, high cost, cumbersome synthesis steps, etc., and achieve low preparation cost and excellent reaction process. The effect of simplicity and high room temperature ionic conductivity

Active Publication Date: 2022-03-08
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a polymer gel electrolyte and its preparation method and application, and solve the technical problems of high cost, cumbersome synthesis steps, and low room temperature conductivity of the polymer gel electrolyte in the prior art

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  • A kind of polymer gel electrolyte and its preparation method and application
  • A kind of polymer gel electrolyte and its preparation method and application
  • A kind of polymer gel electrolyte and its preparation method and application

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preparation example Construction

[0020] The second aspect of the present invention provides a method for preparing a polymer gel electrolyte, comprising the following steps: mixing long-chain diene-based monomers, dimercapto monomers, and tetramercapto cross-linking agents in the electrolyte solution and then adding The catalyst is continuously mixed evenly to obtain a mixed solution, and then the mixed solution is transferred to a porous support material for in-situ polymerization to obtain a polymer gel electrolyte. The inventors found during the experiment that the order of adding the catalysts is very important to whether the present invention can be realized. In order to realize the technical solution of the present invention, the catalyst must be added after the long-chain diene-based monomer, dimercapto monomer and tetramercapto crosslinking agent are evenly mixed.

[0021] The preparation method of the polymer gel electrolyte provided by the second aspect of the present invention is used to prepare th...

Embodiment 1

[0029] Weigh polyethylene glycol diacrylate (Mw=400Da, 3.2g, 8mmol), 3,6-dioxa-1,8 octane dithiol (0.2g, 1.1mmol), 1.0mol / L LiPF 6EC:EMC:DEC (3:6:1, w / w / w) 4.1g, pentaerythritol tetramercaptoacetate (2.0g, 4.62mmol), after mixing, stir evenly and then add n-hexylamine 0.05g to obtain a mixed solution , and finally 180 mg of the above mixed solution was transferred to 20 mg of porous support material, and allowed to react at 25° C. for 20 min to obtain a polymer gel electrolyte.

Embodiment 2

[0031] Weigh polyethylene glycol diacrylate (Mw=800Da, 3.76g, 4.7mmol), 3,6-dioxa-1,8 octanedithiol (0.47g, 2.6mmol), 1.0 mol / L LiPF 6 EC:EMC:DEC (3:6:1, w / w / w) 4.1g, pentaerythritol tetramercaptoacetate (1.17g, 2.7mmol), after mixing, stir evenly and then add n-hexylamine 0.03g to obtain a mixed solution , and finally 180 mg of the above mixed solution was transferred to 20 mg of porous support material, and allowed to react at 25° C. for 20 min to obtain a polymer gel electrolyte.

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Abstract

The invention discloses a polymer gel electrolyte, a preparation method and application thereof. The polymer gel electrolyte includes a cross-linked network polymer, an electrolyte and a porous support material; It is obtained by adding a catalyst and reacting; the mass fraction of the porous support material in the polymer gel electrolyte is 10-15%, and the mass ratio of the cross-linked network polymer to the electrolyte is (1-7):1. The present invention prepares the polymer gel electrolyte only under the action of the catalyst without additional photoinitiation or thermal initiation, the reaction process is simple, efficient, and low in preparation cost; at the same time, due to the addition of a large amount of electrolyte, the obtained polymer gel Electrolytes have high room temperature ionic conductivity.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a polymer gel electrolyte and its preparation method and application. Background technique [0002] Lithium-ion batteries are widely used in electronic products, mobile devices and other fields due to their advantages such as high energy density, low self-discharge, and no memory effect. At present, the commercial production of lithium-ion batteries mainly uses organic electrolyte systems, generally using flammable and explosive ethylene carbonate (EC)-dimethyl carbonate (DMC) as the electrolyte, which has certain potential safety hazards. Although solid-state electrolytes solve the safety problems caused by traditional commercial electrolytes, their own problems such as low ionic conductivity, high brittleness, high material sensitivity, and difficult processing cannot be ignored. [0003] Polymer gel electrolytes combine the dual advantages of liquid electrolytes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/058H01M10/0525C08G65/334
CPCH01M10/0565H01M10/058H01M10/0525C08G65/3344H01M2300/0088Y02E60/10Y02P70/50
Inventor 刘志宏徐锐高淑豫尤庆亮郑云刘学清刘继延程鑫宣策
Owner JIANGHAN UNIVERSITY