Colloidal polymer electrolyte for lithium ion cell and its preparing method

A technology of colloidal polymer and electrolyte, applied in secondary battery parts and other directions, can solve the problems of high ionic conductivity, large internal resistance and complex production process

Inactive Publication Date: 2004-12-15
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the Japanese patent application JP 037 752A, a polymer electrolyte was prepared by mixing ethylene glycol and dimethacrylate and performing UV irradiation, but the ionic conductivity of the prepared colloidal polymer electrolyte was too low and the internal resistance was large. difficult to apply in practice
[0006] US 4 830 939A discloses a polymer electrolyte, which is prepared by mixing a polymerizable monomer containing one or more unsaturated functional groups with an electrolyte solution and curing with UV light. The ionic conductivity of the prepared polymer electrolyte is relatively high high, but less flexible
[0007

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

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 2

[0041] (1) Purify the polymerized monomer (containing active functional groups) to remove moisture and other impurities;

[0042] (2) Dissolve each monomer in a solvent to prepare a monomer mixture, put the monomer mixture into a reaction vessel, and add

[0043] Hair agent;

[0044] (3) Introduce nitrogen to remove oxygen in the reaction vessel, and react at 65-90°C in the presence of a thermal initiator

[0045] In 6-10 hours, the polymer matrix material can be prepared; or at room temperature in the presence of a room temperature initiator

[0046] After standing for 12 to 72 hours, the polymer substrate can also be obtained after polymerization;

[0047] (4) Dissolve the matrix material in the electrolyte solution after vacuum drying, and add a certain amount of

[0048] Cross-linking agent, mixed evenly;

[0049] (5) The mixed solution is directly injected into the battery, and after a period of time, colloidal polymer electrodes can be formed in the batte...

Embodiment 1

[0055] Methyl methacrylate: 98 parts

[0056] Ethylene glycol diacrylate: 2 parts

[0057] Dibenzoyl peroxide: 0.8 parts

[0058] N, N-dimethylaniline: 0.4 parts

[0059] Electrolyte: 1MLiPF 6 , DMC:DEC:EC=1:1:1 (volume ratio), 400 parts

[0060] Take purified methyl methacrylate, ethylene glycol diacrylate, and dibenzoyl peroxide, and place them in container A; take another electrolyte solution and N, N-dimethylaniline, and place them in container B, and put A and B are uniformly mixed and the mixed liquid is injected into the battery, and the reaction monomers will gradually polymerize under the initiation of the redox initiation system, and the colloidal polymer electrolyte can be generated in the battery after 24 to 48 hours.

Embodiment 2

[0062] Methyl methacrylate: 98.8 parts

[0063] Hydroxyethyl methacrylate: 1.2 parts

[0064] Dibenzoyl peroxide: 1 part

[0065] Isophorone diisocyanate: 0.6 parts

[0066] Electrolyte: 1MLiPF 6 , DMC:DEC:EC=1:1:1 (volume ratio), 900 parts

[0067] Methyl methacrylate and hydroxyethyl methacrylate are purified to remove water and other impurities. Dissolve the treated monomer in a solvent and load it into a reaction vessel, add a thermal initiator-dibenzoyl peroxide, and add 150 parts of ethyl acetate and toluene mixed solvent (volume ratio 9:1), pass into The nitrogen gas removes the oxygen in the container, and reacts at 75-80° C. for 8 hours under the nitrogen atmosphere to prepare the polymer matrix material.

[0068] The matrix material is vacuum-dried and dissolved in the electrolyte solution, and the cross-linking agent IPDI is added, and the mixed solution is injected into the battery. After about 18 hours, a colloidal polymer electrolyte can be formed in the bat...

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

No PUM Login to view more

Abstract

The colloidal polymer electrolyte system consists of acrylate monomer and its derivative 100 (in weight portions, the same below) including that with functional group 0.4-10; electrolyte liquid 300-1900; initiator 0.2-4 and crosslinking agent 0-5. One of preparation process incldues mixing the components, liquid state filling, polymerizing in the cell chamber to form colloidal polymer electrolyte. The other preparation process includes polymerizing acrylate monomer and its derivative, dissolving the polymer in electrolyte liquid, adding crosslinking agent to mix homogeneously, filling into cell chamber and crosslinking inside the cell chamber to form colloidal polymer electrolyte. The present invention is easy to operate and high in safety, and the prepared electrolyte has excellent comprehensive performance.

Description

field of invention [0001] The present invention relates to a colloidal polymer electrolyte for lithium ions, and more particularly, the present invention relates to a colloidal polymer electrolyte system that can be produced by polymerization or crosslinking in a battery, and a method for producing the colloidal polymer electrolyte. technical background [0002] Polymer lithium-ion battery is a new type of lithium battery developed on the basis of liquid lithium-ion batteries. Its advantages lie in small size, light weight, and thin thickness, which provide further lightening and thinning for mobile communication tools such as mobile phones and notebook computers. possible. Polymer lithium-ion battery is a new direction for the development of lithium-ion technology and has broad application prospects, so it has attracted the attention of researchers and producers. [0003] The core technology of polymer lithium-ion batteries is the preparation of high-performance polymer el...

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): C08L33/08H01M10/02
CPCY02E60/12Y02E60/10
Inventor 胡继文李小平李明威肖定书
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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