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Modified polymethyl methacrylate electrolyte as well as preparation method, lithium ion battery and application thereof

A technology of polymethyl methacrylate and lithium ion battery, applied in the field of electrochemical power supply, can solve the problems of low battery yield, unsatisfactory effect, limited improvement in electrical conductivity and the like

Inactive Publication Date: 2014-06-11
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

However, the effect is not very satisfactory, and the battery yield is not high
In addition, the existing gel polymer electrolytes have limited improvement in electrical conductivity, and cannot well meet the growing needs and application range of the market.

Method used

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  • Modified polymethyl methacrylate electrolyte as well as preparation method, lithium ion battery and application thereof
  • Modified polymethyl methacrylate electrolyte as well as preparation method, lithium ion battery and application thereof

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preparation example Construction

[0023] The embodiment of the present invention provides a method for preparing a modified polymethyl methacrylate electrolyte with a simple process. The process flow of this method is as figure 1 As shown, it includes the following steps:

[0024] S01: Obtain MCM-48 mesoporous molecular sieve;

[0025] S02: Preparation of slurry: dissolve polymethyl methacrylate in an organic solvent, then add the MCM-48 mesoporous molecular sieve and stir and mix at 30-50°C to obtain a slurry; wherein, the polymethyl methacrylate The weight ratio of methyl acrylate to MCM-48 mesoporous molecular sieve is 100:10~30;

[0026] S03: Preparation of modified polymethyl methacrylate (PMMA) electrolyte membrane: coating the slurry in step S02 on the substrate, and drying in vacuum to obtain a modified polymethyl methacrylate electrolyte membrane;

[0027] S04: Preparation of modified polymethyl methacrylate electrolyte: Under the protection of inert gas, the above modified polymethyl methacrylate ...

Embodiment 1

[0053] PMMA electrolyte modified by MCM-48 mesoporous molecular sieve and preparation method thereof, the preparation method comprising the steps of:

[0054] S11: Obtain MCM-48 mesoporous molecular sieve: Weigh 0.6g CTAB (cetyltrimethylammonium bromide), dissolve it in 65mL deionized water, then add 0.47g sodium hydroxide, and heat the system to 40°C Stir at a constant temperature for a period of time to dissolve it, slowly add 1.0 g of tetraethyl orthosilicate, and continue stirring for 4 hours to obtain a mixed solution; transfer the solution into a polytetrafluoroethylene-lined reaction kettle, and statically crystallize it in an oven at 100°C. Filter, wash with water, and dry at 80°C for 24 hours to obtain the precursor of MCM-48 mesoporous molecular sieve; finally, place the precursor in a muffle furnace at a heating rate of 5°C / min, and bake it at 550°C for 6 hours to remove The template agent CTAB is calcined to obtain MCM-48 mesoporous molecular sieve;

[0055] S12: ...

Embodiment 2

[0059] PMMA electrolyte modified by MCM-48 mesoporous molecular sieve and preparation method thereof, the preparation method comprising the steps of:

[0060] S21: Obtain MCM-48 mesoporous molecular sieve: Weigh 0.65g CTAB (cetyltrimethylammonium bromide), dissolve it in 75mL deionized water, then add 0.5g sodium hydroxide, and heat the system to 20°C Stir at a constant temperature for a period of time to dissolve it, slowly add 1.0g of tetraethyl orthosilicate, and continue to stir for 5 hours to obtain a mixed solution; transfer the solution into a polytetrafluoroethylene-lined reaction kettle, and statically crystallize it in an oven at 100°C. Filter, wash with water, and dry at 90°C for 12 hours to obtain the precursor of MCM-48 mesoporous molecular sieve; finally, place the precursor in a muffle furnace at a heating rate of 3°C / min, and bake it at 500°C for 10 hours to remove The template agent CTAB is calcined to obtain MCM-48 mesoporous molecular sieve;

[0061] S22: P...

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Abstract

The invention provides a modified PMMA (polymethyl methacrylate) electrolyte of MCM-48 mesoporous molecular sieve as well as a preparation method thereof, a lithium ion battery and application thereof. The modified PMMA electrolyte contains PMMA, MCM-48 mesoporous molecular sieve and electrolyte, wherein the weight ratio of the PMMA to MCM-48 mesoporous molecular sieve to electrolyte is 100:(10-30):(50-120). The preparation method comprises the steps of obtaining the MCM-48 mesoporous molecular sieve, preparing a sizing agent, preparing a modified PMMA electrolyte membrane and preparing the modified PMMA electrolyte. The lithium ion battery contains the modified PMMA electrolyte. The modified PMMA electrolyte is high in mechanical strength and conductivity, and low in production cost, and adopts a simple preparation method and a mature technology. The lithium ion battery comprising the modified PMMA electrolyte is high in rate of finished products, low in production cost, excellent in electrochemical performance and large in application range.

Description

technical field [0001] The invention belongs to the technical field of electrochemical power sources, and in particular relates to a modified polymethyl methacrylate electrolyte and a preparation method thereof, a lithium ion battery and applications thereof. Background technique [0002] Lithium-ion battery is a kind of green battery, which has the advantages of light weight, large capacity, no memory effect, fast charging speed, long cycle life, high discharge efficiency, wide operating temperature range, good reliability, pollution-free and maintenance-free, etc. It is a new, efficient and practical energy storage device, so it is widely used in electric tools, bicycles, scooters, miner's lamps, medical equipment, hybrid vehicles and other occasions that require high current charging and discharging. [0003] Lithium-ion battery working electrolytes are divided into aqueous electrolytes, organic liquid electrolytes and polymer electrolytes. The decomposition voltage of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0568H01M10/058H01M10/0525
CPCY02E60/122H01M10/0525H01M10/0565H01M10/058H01M2300/0082Y02E60/10Y02P70/50
Inventor 周明杰刘大喜王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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