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Preparation method of polymer gel electrolyte

A gel electrolyte and polymer technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve problems such as difficulties in automatic production, complex production processes, and impact on battery performance, and achieve easy promotion and application, simple Preparation method, effect of reducing preparation cost

Inactive Publication Date: 2007-04-18
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process is quite complicated, and the equipment and process requirements are high, which makes the preparation cost of the battery relatively high, and automatic production is difficult
The second preparation method is to add polymerized monomers and initiators to the liquid electrolyte, inject the electrolyte into the battery, and initiate polymerization of the monomers inside the battery by heat or ultraviolet light (US6933080, CN1526759). This method is simple to operate, but the residues of polymerized monomers and initiators are difficult to eliminate, which will affect the performance of the battery

Method used

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  • Preparation method of polymer gel electrolyte
  • Preparation method of polymer gel electrolyte
  • Preparation method of polymer gel electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 500ml of electrolyte in a 1-liter flat-bottomed flask. The composition of the electrolyte is: ethylene carbonate 17.64%, propylene carbonate 17.64%, diethyl carbonate 49.92%, LiBOB: 10.8%, vinylene carbonate: 1.0%. In the electrolyte, add methyl methacrylate and vinyl acetate with a mass ratio of 1:2, copolymerized into a polymer with a molecular weight of 8000, and the amount added is 3.0% of the weight of the electrolyte. When adding, start magnetic stirring, and the electrolyte will The temperature is 60°C. The electrolyte solution after dissolution is a colorless and transparent gel-state electrolyte solution with a viscosity of 500, a moisture content of 12.2 ppm, and an acidity (calculated as HF) content of 15.8 ppm. The preparation process is carried out in a glove box filled with argon and the moisture content is below 5ppm.

[0027] Detection method:

[0028] The moisture in the electrolyte was measured by the Coulomb Karl Fischer method, the acidity in t...

Embodiment 2-7

[0041]

Embodiment 8

[0043] With embodiment 1, just change ethylene carbonate of carbonate solvent into dimethyl carbonate, propylene carbonate into dipropyl carbonate, diethyl carbonate into ethyl methyl carbonate, electrolyte temperature is 25 ℃, polymerization The product is polymerized from methyl methacrylate and vinylidene fluoride with a mass ratio of 3:1 to form a molecular weight of 100,000, and the lithium salt LiBOB is replaced with 5.8% LiN(CF 3 SO 2 ) 2 and 5.0% LiBF 4 , the vinylene carbonate of the film-forming additive was replaced by sulfonyl butyrolactone, the viscosity of the prepared gel-state electrolyte was 1400, and the acidity was 14.0ppm, and then various tests in Example 1 were carried out.

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Abstract

This invention relates to a preparation of polymer gel electrolytic solution, it is a preparation of lithium ion battery electrolytic solution which is high molecular polymer Gel state. It discloses that polymer dissolves in electrolytic solution mainly consists of carbonate solvent and Lithium salt, or first polymer dissolves in carbonate solvent, adding Lithium salt after cooling below 20DEG C,getting water white colloidal state electrolytic solution whose viscosity is 300-2500. This invention uses simple and easy preparation of electrolyte, while cutting down the preparation cost of electrolyte and the electrolyte battery, increasing the battery efficiency prepared by the electrolyte, it is easy to spread to apply.

Description

technical field [0001] The invention relates to a preparation method of a lithium ion battery electrolyte, in particular to a preparation method of a high molecular polymer gel state lithium ion battery electrolyte. Background technique [0002] Lithium-ion batteries have the characteristics of high working voltage, high specific energy, long cycle life, environmental friendliness and no memory effect, and have been developed rapidly. However, conventional liquid lithium-ion batteries have potential safety hazards of easy leakage and flammability. Therefore, polymer lithium-ion batteries have attracted the attention of the market. In addition to overcoming the above-mentioned shortcomings of liquid lithium-ion batteries, polymer lithium-ion batteries also use soft It is packaged with non-toxic materials, and the shape design is more flexible and convenient. Therefore, polymer lithium-ion batteries are considered to be the most promising secondary battery system at present. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L101/02H01M10/40H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 刘建生左晓希贺云鹏周莉
Owner GUANGZHOU TINCI MATERIALS TECH