Gel electrolyte film of lithium battery and preparation method of gel electrolyte film

A gel electrolyte and lithium battery technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, secondary batteries, etc., can solve the problems of limiting the application of gel polymer electrolytes and the need to improve the mechanical strength, and achieve good ion conductivity and mechanical strength, good adaptability and biodegradability, and high biocompatibility

Inactive Publication Date: 2011-08-31
海南椰国热带水果食品加工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the concentration of the polymer in the "gel state" is not high, its mechanical strength needs to be improved, which also limits the application of gel polymer electrolytes in lithium batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) After repeatedly washing the bacterial cellulose membrane with distilled water, soak it in 80° C., 1 wt% NaOH solution, and keep it warm for 1 hour, so that the pH value of the bacterial cellulose membrane is 7;

[0034] (2) Put the neutral bacterial cellulose film into a beater, beat and disperse for 15 minutes at a rotating speed of 1000r / min, and make a bacterial cellulose slurry;

[0035] (3) The bacterial cellulose slurry is dehydrated by vacuum pump suction filtration device to obtain the matrix material of the lithium battery gel electrolyte membrane;

[0036] (4) Soak the base material in the electrolyte for 30 minutes to obtain a lithium battery gel electrolyte membrane, which is composed of LiClO 4 Composed of polyethylene glycol dimethyl ether, wherein the molecular weight of the solvent polyethylene glycol dimethyl ether is 280, LiClO 4 The molar concentration of LiClO is 1mol / L. 4 The mass ratio to polyethylene glycol dimethyl ether is 1:2.

[0037] ...

Embodiment 2

[0039] (1) After repeatedly washing the bacterial cellulose membrane with distilled water, soak it in 85°C, 1.5wt% NaOH solution, and keep it warm for 1.25 hours, so that the pH value of the bacterial cellulose membrane is 7;

[0040] (2) Put the neutral bacterial cellulose film into a beater, beat and disperse for 20 minutes at a rotating speed of 1200r / min, and make a bacterial cellulose slurry;

[0041] (3) The bacterial cellulose slurry is dehydrated by vacuum pump suction filtration device to obtain the matrix material of the lithium battery gel electrolyte membrane;

[0042] (4) Soak the base material in the electrolyte for 40 minutes to obtain a lithium battery gel electrolyte membrane, which is made of LiClO 4 and ethylene carbonate, wherein the molecular weight of the solvent ethylene carbonate is 88, LiClO 4 The molar concentration of LiClO is 1mol / L. 4 The mass ratio to ethylene carbonate is 1:3.

[0043] The pore diameter of the finally obtained lithium battery ge...

Embodiment 3

[0045] (1) After repeatedly washing the bacterial cellulose membrane with distilled water, soak it in a 90°C, 2wt% NaOH solution and keep it warm for 1.5 hours to make the bacterial cellulose membrane pH 7;

[0046] (2) Put the bacterial cellulose film into a beater, beat and disperse for 25 minutes at a rotating speed of 1300r / min, and make a bacterial cellulose slurry;

[0047] (3) The bacterial cellulose slurry is dehydrated by vacuum pump suction filtration device to obtain the matrix material of the lithium battery gel electrolyte membrane;

[0048] (4) Soak the base material in the electrolyte for 50 minutes to obtain a lithium battery gel electrolyte membrane, which is made of LiClO 4 and propylene carbonate, wherein the molecular weight of the solvent propylene carbonate is 102, LiClO 4 The molar concentration of LiClO is 1mol / L. 4 The mass ratio to propylene carbonate is 1:4.

[0049] The pore diameter of the finally obtained lithium battery gel electrolyte membran...

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Abstract

The invention relates to a gel electrolyte film of a lithium battery and a preparation method of the gel electrolyte film. The preparation method comprises the following steps of: making bacterial cellulose neutral; producing bacterial cellulose pulp by beating and dispersion; and performing suction-filtration, dehydration and electrolyte soaking to obtain the gel electrolyte film. The gel electrolyte film of the lithium battery provided by the invention has good ion conductivity and mechanical strength and effectively solves the problem of poor mechanical strength of the gel electrolyte film. By the preparation method of the gel electrolyte film, the thickness of the gel electrolyte film is reduced by means of beating and suction filtration, the surface smoothness of the gel electrolyte film of the lithium battery is improved, fibre distribution is more uniform, arrangement is dense, physical property is relatively strong, an application range is expanded, a preparation process is simple, and industrial production is easy to carry out.

Description

technical field [0001] The invention belongs to the technical field of electrolyte membranes for batteries, in particular to a lithium battery gel electrolyte membrane with bacterial cellulose as a base material and a preparation method thereof. Background technique [0002] With the vigorous development of the electronic information industry, energy has become a bottleneck restricting its development. In view of the current energy shortage, finding new energy has become one of the important ways to solve the energy shortage problem. More and more focus has begun to focus on quality. Light, safe, non-toxic, high specific energy energy material lithium battery, it has the advantages of high rated voltage, high specific energy, long service life, low self-discharge rate and environmental protection. [0003] At present, because the liquid electrolyte contained in lithium batteries is prone to leakage, it faces serious safety problems. Studies have shown that the use of polymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/058C08L1/02
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 钟春燕王彪尹璐钟宇光
Owner 海南椰国热带水果食品加工有限公司
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