All-solid-state electrolyte membrane of lithium ion battery and preparation method thereof

A technology of lithium ion battery and electrolyte membrane, applied in the field of all-solid-state lithium battery manufacturing, can solve the problems of low room temperature conductivity, etc., and achieve the effects of high room temperature conductivity, good compatibility and low melting point

Active Publication Date: 2014-03-19
DONGFANG ELECTRIC CORP LTD
View PDF4 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently developed all-solid polymer electrolytes generally have the defect of

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
  • All-solid-state electrolyte membrane of lithium ion battery and preparation method thereof
  • All-solid-state electrolyte membrane of lithium ion battery and preparation method thereof
  • All-solid-state electrolyte membrane of lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] a. Preparation of polymer electrolyte colloidal emulsion

[0038] First dissolve EVA in an organic solvent, add acrylonitrile monomer to the EVA solution and increase the temperature to 70~80℃; then add dropwise the solution containing the initiator benzoyl peroxide for polymerization for 2~5 hours, add VEC for further After 6-24 hours of polymerization, a polymer colloidal liquid is obtained. Dissolve an appropriate amount of lithium salt ultrasonically in a mixed solution of diethyl carbonate (DEC) or DEC / EC, add the completely dissolved lithium salt solution to the polymer colloidal emulsion and stir for 1 to 6 hours.

[0039] b. Preparation of composite polymer electrolyte emulsion modified by inorganic nano filler

[0040] The polymer colloidal liquid obtained in step a is mechanically stirred and mixed with the polymer colloidal liquid of nano-inorganic fillers uniformly dispersed by a ball mill for 2-8 hours to obtain a modified inorganic / organic composite electrolyte ...

Example Embodiment

[0043] Example 1

[0044] Into a 1L three-necked round bottom flask equipped with a reflux condenser and a stirrer was added ethyl acetate and 1,4-dioxane organic mixed solvent (400 g) and 23.4 g of ethylene-vinyl acetate copolymer (EVA, Sumitate KC-10, 28wt% vinyl acetate), the mixture was heated to 70 ℃ and completely dissolved in the solvent under mechanical stirring, and then 93.6 g of acrylonitrile (AN) monomer was added dropwise and nitrogen gas was added for 30 minutes Then, 30 mL of toluene solution containing 0.49 g of benzoyl peroxide was slowly added dropwise to the reaction system. After the dropwise addition is complete, react for about 1 hour. After the reactant turns into a yellowish emulsion, then add vinyl ethylene acetate (VEC, 46.8g) dropwise. After reacting for 8 hours, P(AN -co- VEC) / EVA polymer emulsion. In this reaction system, the conversion rate of AN is above 85%, the solid content is about 20 wt.%, the particle size of the polymer microspheres is 100...

Example Embodiment

[0046] Example 2

[0047] Into a 1L three-necked round bottom flask equipped with a reflux condenser and a stirrer was added ethyl acetate and 1,4-dioxane organic mixed solvent (400 g) and 23.4 g of ethylene-vinyl acetate copolymer (EVA, Sumitate KC-10, 28wt% vinyl acetate), the mixture was heated to 70 ℃ and completely dissolved in the solvent under mechanical stirring, and then 187.2g of acrylonitrile (AN) monomer was added dropwise and nitrogen gas was added for 30 minutes Then, 30 mL of toluene solution containing 0.49 g of benzoyl peroxide was slowly added dropwise to the reaction system. After the dropwise addition is complete, react for about 1 hour. After the reactant turns into a slightly yellow emulsion, then add vinyl ethylene acetate (VEC, 50.4g) dropwise. After reacting for 8 hours, P(AN -co- VEC) / EVA polymer emulsion. In this reaction system, the conversion rate of AN is above 85%, the solid content is about 20 wt.%, the particle size of the polymer microspheres ...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to an all-solid-state lithium ion battery diaphragm of a microspheric structure and a preparation method thereof, belongs to the technical field of manufacturing of a lithium battery, and aims at providing a solid polymer electrolyte membrane and a modified all-solid-state polymer electrolyte membrane which are used for solving the bottleneck problem of solid polymer electrolyte, i.e. for improving the room-temperature conductivity of the all-solid-state polymer electrolyte. The spherical granularity of the polymer electrolyte membrane and the modified inorganic/organic composite electrolyte membrane is 100nm to 500nm. The prepared all-solid-state polymer electrolyte membrane is good in heat stability and high in room-temperature conductivity and lithium ion transference number. By virtue of the dry-state polymer electrolyte, the phenomenon that an ordinary liquid battery is likely to burn and explode and the like can be avoided, and the safety reliability of the battery can be improved.

Description

technical field [0001] The invention relates to the technical field of all-solid-state lithium battery manufacturing, in particular to an electrolyte diaphragm material used for energy storage devices such as lithium (ion) secondary all-solid-state batteries and a preparation method thereof. Background technique [0002] Despite its great commercial success, liquid lithium-ion batteries suffer from several serious drawbacks. First of all, because liquid lithium-ion batteries contain liquid electrolytes, the packaging of the shell is relatively limited; second, the liquid electrolytes used in liquid lithium-ion batteries are extremely flammable. If the battery valve is opened and the liquid electrolyte overflows, the discharged liquid electrolyte may burn. This is the biggest safety hazard in consumer electronics; in addition, liquid lithium-ion batteries have significant size limitations for both large and small batteries. [0003] Polymer lithium-ion batteries are a new di...

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
IPC IPC(8): H01M10/0565H01M10/058
CPCC08F220/44H01M10/0565C08F218/12Y02E60/10Y02P70/50
Inventor 黄兴兰王睿谢皎阮晓莉王荣贵
Owner DONGFANG ELECTRIC CORP 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