Gel polymer electrolyte and preparation method thereof

A technology of gel polymers and electrolytes, which is applied in hybrid capacitor electrolytes, hybrid/electric double layer capacitor manufacturing, circuits, etc., and can solve problems such as high conductivity, reduced stability of electric double layer capacitors, and low melting point

Inactive Publication Date: 2014-05-21
OCEANS KING LIGHTING SCI&TECH CO LTD +2
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The carbonyl group in the methacrylic acid unit of the polymethyl methacrylate (PMMA) system has a strong interaction with the oxygen in the carbonate plasticizer, so it can absorb a large amount of liquid electrolyte solution, and exhibits strong compatibility with lithium electrodes. Good interface stability, suitable for electrolyte matrix materials, lithium dicyanamide is one of the most promising lithium salts suitable for low temperature environments in the north because of its low melting point and high conductivity. However, lithium dicyanamide The PMMA-based gel polymer electrolyte will inevitably contain impurities (water) during the preparation process, and the dicyanoamide group is easily hydrolyzed, resulting in the use of the PMMA-based gel polymer electrolyte of lithium dicyanamide as the electrolyte. Decreased stability of electric double layer capacitors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gel polymer electrolyte and preparation method thereof
  • Gel polymer electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] see figure 1 , the preparation method of above-mentioned gel polymer electrolyte, comprises the following steps:

[0024] Step S110, ultrasonically dispersing the anhydrous chloride in the electrolyte to form a mixed solution, the electrolyte includes lithium dicyanamide and a plasticizer, and the mass ratio of lithium dicyanamide to the plasticizer is 1:7-1: 9. The plasticizer is formed by mixing ethylene carbonate and dimethyl carbonate. The mass ratio of anhydrous chloride to electrolyte is 1:850~1:14. Anhydrous chloride is selected from anhydrous magnesium chloride and anhydrous chloride at least one of calcium.

[0025] Preferably, the mass ratio of the anhydrous chloride to the electrolyte is 2:85-1:14.

[0026] Preferably, the volume ratio of ethylene carbonate to dimethyl carbonate is 1:1.5˜1:3.

[0027] Preferably, the time for ultrasonic dispersion is 5 minutes to 30 minutes.

[0028] Step S120, immersing the polymethyl methacrylate microporous membrane in...

Embodiment 1

[0034] In the glove box, 0.5g of anhydrous magnesium chloride was ultrasonically dispersed (ultrasound for 30min) in 8.5g of lithium salt solution to form a mixed solution, wherein the lithium salt solution included LiN(CN) 2 And plasticizer, the mass ratio of LiN(CN)2 to plasticizer is 1:8, the plasticizer is formed by mixing EC and DMC with a volume ratio of 1:2, and then 1g of dried PMMA microporous membrane is immersed in In the above mixed solution, the PMMA microporous membrane completely adsorbed the mixed solution after 180 minutes to obtain a PMMA-based gel polymer electrolyte added with anhydrous magnesium chloride. 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 anhydrous magnesium chloride is 5%.

Embodiment 2

[0036] In the glove box, ultrasonically disperse 0.4g of anhydrous calcium chloride (ultrasound for 25min) in 8.4g of lithium salt solution to form a mixed solution, wherein the lithium salt solution includes LiN(CN)2 and plasticizer, LiN(CN)2 The mass ratio with 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 1.2g of dried PMMA microporous membrane in the above mixed solution, and after 150min, it is Take it out to obtain a PMMA-based gel polymer electrolyte added with anhydrous calcium chloride. 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 anhydrous calcium chloride is 4%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a gel polymer electrolyte, which includes polymethyl methacrylate, and an electrolyte solution and an anhydrous chloride 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 anhydrous chloride 0.1%-5%. The electrolyte solution comprises lithium biscyanoamide 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 anhydrous chloride is at least one of anhydrous magnesium chloride and anhydrous calcium chloride. The gel polymer electrolyte can avoid hydrolysis of the biscyanoamide radical. 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] The carbonyl group in the methacrylic acid unit of the polymethyl methacrylate (PMMA) system has a strong interaction with the oxygen in the carbonate plasticizer, so it can absorb a large amount of liquid electrolyte solution, and exhibits strong compatibility with lithium electrodes. Good interface stability, suitable for electrolyte matrix materials, lithium dicyanamide lithium is one of the most promising lithium salts suitable for low temperature environmen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565
CPCY02E60/13H01G11/56H01G11/84
Inventor 周明杰邓惠仁王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap