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Composite polymer gel electrolyte as well as preparation method and application thereof

A technology of gel electrolyte and composite polymer, which is applied in the direction of composite electrolyte, non-aqueous electrolyte battery, electrolyte immobilization/gelation, etc., can solve the problems of poor mechanical properties and single performance, and achieve high temperature performance and preparation method Simple, leak-reducing effect

Inactive Publication Date: 2020-06-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems of single performance and poor mechanical performance of existing materials, and provides a composite polymer gel electrolyte with multiple functions and good mechanical performance, as well as its preparation method and application

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  • Composite polymer gel electrolyte as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of 10wt% PAN / 20wt% APP functionalized polymer gel electrolyte:

[0025] Weigh 1g of PAN powder and dissolve it in 10ml of DMF by heating at 50°C, and heat and stir for 3h. 2.61 g of APP (polymerization degree n=1000) was weighed and dissolved into the above solution to obtain a uniform spinning solution.

[0026] The spinning solution obtained in the previous step is injected into a 20ml syringe, the spinning voltage is 18kV, the injection speed is 1.2ml / h, and the roller receives the spinning film. Put the prepared APAN electrolyte membrane into a vacuum oven to dry to obtain the APAN electrolyte membrane.

[0027] The method for preparing 0.5wt%CNTs / 0.5wt%PAA functional layer:

[0028] Weigh 0.02g PAA, stir at room temperature for 5h, dissolve in 5ml ethanol, weigh 0.02g CNTs, ultrasonically disperse in PAA solution, ultrasonically disperse for 8h to obtain a uniformly dispersed solution, cut the APAN electrolyte film so that it can be completely and eve...

Embodiment 2

[0032] Preparation of 15wt% PAN / 15wt% APP functionalized polymer gel electrolyte:

[0033] Weigh 1.63g of PAN powder and dissolve it in 10ml of DMF by heating at 60°C, and heat and stir the solution for 5h. 1.67 g of APP (polymer n=500) was weighed and dissolved into the above solution to obtain a uniform spinning solution.

[0034] The spinning solution obtained in the previous step is injected into a 20ml syringe, the spinning voltage is 16kV, the injection speed is 1.0ml / h, and the roller receives the spinning film. The prepared APAN electrolyte membrane was dried in a vacuum oven to obtain the APAN electrolyte.

[0035] The method for preparing 0.25wt%CNTs / 0.25wt%PAA functional layer:

[0036] Weigh 0.01g PAA, stir at room temperature for 3h, dissolve in 5ml ethanol, weigh 0.01g CNTs, ultrasonically disperse in the PAA solution, ultrasonically disperse for 2h to obtain a uniformly dispersed solution, and cut the APAN electrolyte film so that it can be completely and even...

Embodiment 3

[0040]Preparation of 20wt% PAN / 10wt% APP functionalized polymer gel electrolyte:

[0041] Weigh 2.37g of PAN powder and dissolve it in 10ml of DMF by heating at 70°C, and heat and stir the solution for 10h. 1.16 g of APP (polymerization degree n=50) was weighed and dissolved into the above solution to obtain a uniform spinning solution.

[0042] Inject the spinning solution obtained in the previous step into a 20ml syringe, the spinning voltage is 15kV, the injection speed is 0.8ml / h, and it is received by an aluminum plate. The prepared APAN electrolyte membrane was dried in a vacuum oven to obtain the APAN electrolyte.

[0043] The method for preparing 0.1wt%CNTs / 0.1wt%PAA functional layer:

[0044] Weigh 0.004g PAA, stir at room temperature for 2 hours, dissolve in 5ml ethanol, weigh 0.004g CNTs, ultrasonically disperse in the PAA solution, ultrasonically disperse for 5 hours to obtain a uniformly dispersed solution, and cut the APAN electrolyte film so that it can be com...

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Abstract

The invention relates to a composite polymer gel electrolyte as well as a preparation method and application thereof, which solves the technical problems of single performance and poor mechanical property of the existing material. The composite polymer gel electrolyte consists of an ammonium polyphosphate modified polyacrylonitrile electrolyte layer and a carbon nano tube / polyacrylic acid layer. The invention further provides a preparation method and application of the composite polymer gel electrolyte. The preparation method can be applied to the field of battery electrolyte preparation.

Description

technical field [0001] The invention belongs to the field of battery materials, in particular to a composite polymer gel electrolyte and its preparation method and application. Background technique [0002] At present, most lithium-sulfur batteries have the following disadvantages: 1. Lithium-sulfur batteries have high specific capacity and specific energy density, and polysulfides are formed during charging and discharging to form a shuttle effect, causing battery energy attenuation; 2. Combustible sulfur and The polymer electrolyte membrane used causes potential safety hazards, and the electrolyte used is mainly an organic electrolyte that is easy to burn. At the same time, the lithium-sulfur battery of the organic electrolyte is easy to leak from the battery during use, and there are potential safety hazards; A series of safety problems such as uneven deposition, easy formation of lithium dendrites, and short circuit caused by piercing the diaphragm also limit its develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/42H01M10/052
CPCH01M10/052H01M10/0565H01M10/4235H01M2300/0085H01M2300/0088Y02E60/10
Inventor 隋刚黄校萱朱明杨小平
Owner BEIJING UNIV OF CHEM TECH
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