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Self-healing interpenetrating network polymer electrolyte as well as preparation method and application thereof

A technology of interpenetrating network and polymer, which is applied in the field of interpenetrating network polymer electrolyte and its preparation, can solve the problems of reducing electrical conductivity, achieve the effect of improving electrical conductivity, solving internal short circuit, and improving the safety of use

Active Publication Date: 2020-06-26
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the quadruple hydrogen bond unit does not have the ability to conduct lithium ions, the ionic conductivity of the self-healing polymer electrolyte will show a downward trend with the increase of the quadruple hydrogen bond unit, so that the patent can improve the mechanical properties of the electrolyte at the same time reduce conductivity

Method used

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  • Self-healing interpenetrating network polymer electrolyte as well as preparation method and application thereof
  • Self-healing interpenetrating network polymer electrolyte as well as preparation method and application thereof
  • Self-healing interpenetrating network polymer electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing a self-healing interpenetrating network polymer electrolyte, the preparation method of which is as follows:

[0040] S1: Under the condition of an inert atmosphere, make 2-formylphenylboronic acid and 2-aminopolypropylene glycol-polyethylene glycol-polypropylene glycol block copolymer in a molar ratio of 20:1, that is, 30g of 2-formylphenylboronic acid And 20.0g of 2-aminopolypropylene glycol-polyethylene glycol-polypropylene glycol block copolymer (m=3, n=30), dissolved in methanol, at 60 ° C, stirred for 20h for aldehyde-amine condensation, adding 2g Redox of sodium borohydride yields polymer III;

[0041]S2: Mix lithium salt lithium perchlorate, monomer polyethylene glycol dimethacrylate and butyl methacrylate, and polymer III in a mass ratio of 10:170:170, that is, 0.01g of lithium salt Lithium hexafluorophosphate, 0.13g of polyethylene glycol dimethacrylate, 0.04g of butyl methacrylate, and 0.17g of polymer III were stirred at 60°C for 24 ho...

Embodiment 2

[0045] The difference between embodiment 2 and embodiment 1 is:

[0046] S2: Mix lithium salt lithium perchlorate, monomer polyethylene glycol dimethacrylate and butyl methacrylate, and polymer III in a mass ratio of 1:240:100, that is, 0.001g of lithium salt Lithium hexafluorophosphate, 0.18g of polyethylene glycol dimethacrylate, 0.06g of butyl methacrylate, and 0.24g of polymer III were stirred at 60°C for 24 hours to form a uniform precursor solution.

Embodiment 3

[0048] The difference between embodiment 3 and embodiment 1 is:

[0049] S2: Mix lithium salt lithium perchlorate, monomer polyethylene glycol dimethacrylate and butyl methacrylate, and polymer III in a mass ratio of 22:100:240, that is, 0.022g of lithium salt Lithium hexafluorophosphate, 0.08g of polyethylene glycol dimethacrylate, 0.02g of butyl methacrylate, and 0.24g of polymer III were stirred at 60°C for 24 hours to form a uniform precursor solution.

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Abstract

The invention discloses a self-healing interpenetrating network polymer electrolyte which comprises a lithium salt, a polymer I and a polymer II, and is characterized in that the polymer I is formed by polymerizing a photoreactive monomer, and the polymer II is a cross-linked polymer containing a boron-oxygen six-membered ring. According to the invention, on the basis of ensuring that the polymerelectrolyte has the good self-healing performance, the excellent mechanical properties and conductivity are maintained, and meanwhile, the interface problem between the traditional all-solid-state polymer electrolyte and a pole piece is solved.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and more specifically relates to an interpenetrating network polymer electrolyte with self-healing function and its preparation method and application. Background technique [0002] Electrolyte is one of the important factors affecting the performance of lithium-ion batteries. At present, commercial lithium batteries are still dominated by liquid electrolytes, but liquid electrolytes have potential safety hazards such as flammability and explosion, which pose a severe challenge to the safety of lithium-ion batteries. Compared with liquid electrolytes, solid electrolytes do not contain safety hazards such as flammability and explosion, and have the advantages of high energy density and high mechanical strength. In addition, solid polymer electrolytes can be rationally designed to obtain functional electrolytes. Based on the above advantages, polymer electrolytes have become one of the i...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0082Y02E60/10
Inventor 薛志刚李思博张永李亮周兴平解孝林王娟
Owner HUAZHONG UNIV OF SCI & TECH