Colloidal polymer electrolyte for lithium ion cell and its preparing method

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...

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] In US 5 952 126, a copolymer of N-isopropylacrylamide and polyethylene glycol dimethacrylate and an electrolyte are used to prepare a polymer electrolyte, and the manufacturing process is relatively complicated

[0008] Domestic patent CN 1 317 512A discloses a method for preparing a gel-state lithium-ion polymer electrolyte material by thermochemical crosslinking under a thermal initiator using acrylate series derivatives as monomers. Inject it into the battery, and then heat the battery to cause a reaction. Although the process is simple, it will cause gas swelling and gas swelling, which will affect the performance of the battery.