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Gel polymer electrolyte and preparation method thereof

A gel polymer and electrolyte technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of low conductivity and low lithium ion migration number of gel polymer electrolytes

Inactive Publication Date: 2014-05-21
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LiPF 6 It is one of the most commonly used lithium salts, but the migration number of lithium ions is low, which makes the conductivity of the gel polymer electrolyte low

Method used

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  • Gel polymer electrolyte and preparation method thereof

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preparation example Construction

[0024] see figure 1 , the preparation method of above-mentioned gel polymer electrolyte, comprises the following steps:

[0025] Step S110, ultrasonically dispersing the azaether compound in the electrolytic solution to form a mixed solution, the electrolytic solution includes lithium hexafluorophosphonate and a plasticizer, and the mass ratio of lithium hexafluorophosphonate to the plasticizer is 1:7-1 :9, the plasticizer is formed by mixing ethylene carbonate and dimethyl carbonate, and the mass ratio of azaether compound to electrolyte is 1:850~1:14.

[0026] Preferably, the azaether compound is selected from three (hexafluoroisopropoxy) amines ([(CF 3 ) 2 CHO] 3 N) and three perfluorophenoxyamines ((C 6 f 5 O) 3 One of N).

[0027] Preferably, the volume ratio of ethylene carbonate to dimethyl carbonate is 1:1.5˜1:3.

[0028] Preferably, the time for ultrasonic dispersion is 5 minutes to 30 minutes.

[0029] Step S120, immersing the polymethyl methacrylate micropo...

Embodiment 1

[0035] In a glove box, ultrasonically disperse 0.5g of tris(hexafluoroisopropoxy)amine (30min) in 8.5g of electrolyte to form a mixed solution, wherein the electrolyte includes LiPF 6 and plasticizer, LiPF 6 The mass ratio of the plasticizer to the plasticizer is 1:8, and the plasticizer is formed by mixing EC and DMC with a volume ratio of 1:2, and then immersing 1g of the dried PMMA microporous membrane in the above mixture, and after 180min, the PMMA microporous membrane The membrane completely absorbs the mixed solution to obtain a PMMA-based gel polymer electrolyte added with tris(hexafluoroisopropoxy)amine. In the obtained gel polymer electrolyte, the mass percentage of PMMA matrix is ​​10%, the mass percentage of lithium salt and plasticizer is 85%, and the mass percentage of azaether compound is 5%.

Embodiment 2

[0037] In the glove box, ultrasonically disperse 0.4g trisperfluorophenoxyamine (ultrasonic 25min) in 8.4g electrolyte to form a mixed solution, wherein the electrolyte includes LiPF 6 and plasticizer, LiPF 6 The mass ratio with the plasticizer is 1:9, and the plasticizer is formed by mixing EC and DMC with a volume ratio of 1:1.5, and then immersing 1.2g of dried PMMA microporous membrane in the above mixed solution, and after 150min, it is Take it out to obtain the PMMA-based gel polymer electrolyte added with triperfluorophenoxyamine. In the obtained gel polymer electrolyte, the mass percentage of PMMA matrix is ​​12%, the mass percentage of lithium salt and plasticizer is 84%, and the mass percentage of azaether compound is 4%.

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Abstract

The invention relates to a gel polymer electrolyte, which includes polymethyl methacrylate, and an electrolyte solution and an aza-ether compound adsorbed in the polymethyl methacrylate. Specifically, in the gel polymer electrolyte, the mass content of the polymethyl methacrylate is 10%-25%, the mass content of the electrolyte solution is 70%-85%, and the mass content of the aza-ether compound is 0.1%-5%. The electrolyte solution comprises lithium hexafluorophosphonate and a plasticizer in a mass ratio of 1:7-1:9, and the plasticizer is formed by mixing of ethylene carbonate and dimethyl carbonate. The gel polymer electrolyte has high conductivity. And the invention also provides a preparation method of the gel polymer electrolyte.

Description

technical field [0001] The invention relates to a gel polymer electrolyte and a preparation method thereof. Background technique [0002] Gel polymer electrolyte lithium-ion batteries have been valued by researchers because of their safety, no leakage, and low leakage current. Gel polymer electrolyte is a new type of functional polymer material, which can be used as a separator and electrolyte material at the same time, which can make the battery thinner, thereby improving the flexibility of battery design. [0003] Due to the strong interaction between the carbonyl group in the methyl methacrylate unit and the oxygen in the carbonate plasticizer, the PMMA system can absorb a large amount of liquid electrolyte solution and exhibit good interface stability with the lithium electrode. properties, suitable for electrolyte matrix materials. LiPF 6 It is one of the most commonly used lithium salts, but the migration number of lithium ions is low, which makes the conductivity o...

Claims

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Application Information

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IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M10/058Y02E60/10
Inventor 周明杰邓惠仁王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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