Gel polymer electrolyte, polymer battery, and preparation method thereof

A gel polymer and electrolyte technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, secondary batteries, etc. The room temperature conductivity of the material electrolyte is low, and it cannot meet the ideal requirements, so as to achieve the effect of improving the interface energy, excellent electrochemical performance, and easy large-scale production

Active Publication Date: 2013-12-04
BYD CO LTD
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Nanocomposite polymer electrolytes for lithium batteries (Croce F , Appetecchi GB , Persi L , et al. Nature , 1998 , 394 : 456) discloses a polymer electrolyte by adding a particle size of 5.8–13 to the PEO–LiX system nm of TiO 2 and Al 2 o 3 Ceramic powder can improve the conductivity of the polymer electrolyte, but the room temperature conductivity of the polymer electrolyte prepared by it is low, which can only reach 2×10 -5 Siemens / cm, and the lithium ion migration number is also low, which does not meet the ideal requirements. At the same time, the mechanical properties, electrochemical stability and thermal stability of the polymer electrolyte do not meet the ideal requirements.

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, polymer battery, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The present invention also provides a method for preparing the above-mentioned polymer battery, wherein the method includes adding a mixed solution containing electrolyte, inorganic filler, polymerizable monomer and organic solvent between the positive electrode and the negative electrode of the battery, and then under polymerization conditions The polymerizable monomer in the mixed liquid is subjected to a polymerization reaction to obtain a gel state substance, and the inorganic filler is a metal-ceramic composite material.

[0027] Among them, the polymerizable monomer is generally a polymer monomer, which can be vinylidene fluoride, methyl methacrylate, acrylonitrile, butyl acrylate, methyl acrylate, butyl methacrylate, benzyl methacrylate, One or more of acenaphthylene, vinylpyridine, acrylamide, methyl vinyl ether, vinyl acetate, hexafluoropropylene and vinylpyrroline. In the present invention, vinylidene fluoride and hexafluoropropylene are preferred, and polyvin...

Embodiment 1

[0035] This example is used to illustrate the gel polymer electrolyte, polymer battery and preparation method thereof provided by the present invention.

[0036] (1) 80 parts by weight of vinylidene fluoride, 18 parts by weight of hexafluoropropylene and 10 parts by weight of Ni-YSZ (obtained by sol-gel method, the median particle size of the particles is about 80nm, and the content of Ni element is 15wt%) was dissolved in acetone, stirred ultrasonically at 50°C for 1 hour to obtain a jelly, and 110 parts by weight of electrolyte (1.1 parts by weight of LiPF 6 , 108.9 parts by weight EC:DMC:EMC=1:2:2), and continued to stir for 30 minutes to obtain a mixed solution A1.

[0037] (2) The mixed solution A1 prepared in (1) is injected into the mixture containing 6.3 grams of LiCoO 2 The aluminum foil positive electrode and the copper foil negative electrode containing 3.0 grams of graphite are arranged in parallel and sealed, and then placed in an oven with a temperature of 90 ° ...

Embodiment 2

[0039] This example is used to illustrate the gel polymer electrolyte, polymer battery and preparation method thereof provided by the present invention.

[0040] (1) 80 parts by weight of vinylidene fluoride, 18 parts by weight of hexafluoropropylene and 10 parts by weight of Mg-YSZ (obtained by sol-gel method, the median particle size of the particles is about 100nm, and the content of Mg element is 18wt%) was dissolved in acetone, stirred ultrasonically at 50°C for 1 hour to obtain a jelly, and 110 parts by weight of electrolyte (1.2 parts by weight of LiPF 6 , 108.8 parts by weight EC:DMC:EMC=1:2:2), and continued to stir for 30 minutes to obtain a mixed solution A2.

[0041] (2) The mixed solution prepared in (1) is injected into the mixture containing 6.3 grams of LiCoO 2 The aluminum foil positive electrode and the copper foil negative electrode containing 3.0 grams of graphite are arranged in parallel and sealed, and then placed in an oven with a temperature of 90 ° C ...

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
Login to view more

Abstract

The invention provides a gel polymer electrolyte, a polymer battery containing the same, and a preparation method of the polymer batter. The gel polymer electrolyte comprises polymer, electrolyte, organic solvent, and inorganic stuffing, the electrolyte, organic solvent, and inorganic stuffing disperse in the polymer, wherein the inorganic stuffing is a metal and ceramic compound material. The gel polymer electrolyte has the advantages of higher conductivity, mechanic properties, electrochemical stability and thermostability, and high porosity, and is capable of improving the solution absorption performance of polymer.

Description

technical field [0001] The invention relates to a gel polymer electrolyte, a polymer battery comprising the gel polymer electrolyte, and a preparation method of the polymer battery. Background technique [0002] Polymer lithium-ion batteries have the advantages of light weight, high energy density, good cycle performance, no leakage, no mechanical structure, and various sizes. Polymer electrolytes can be divided into gel polymer electrolytes (GPE) and solid polymer electrolytes (SPE) according to their morphology. The low ion mobility and poor thermal stability of solid electrolytes limit their application in actual production. , while the gel electrolyte has the advantages of both liquid and solid electrolytes. The existing polymers generally used as GPE substrates include polyvinylidene fluoride (PVDF), polyethylene oxide (PEO), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), etc. , but due to the easy crystallization caused by the stru...

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): H01M10/0565H01M10/0525H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 王夏芬李会娜杨鹏巢亚军杨泽乾王慧颖
Owner BYD 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