Flexible high-molecular polymer, preparation method thereof and application of flexible high-molecular polymer in lithium battery

• Main Author: HE MINHUA
• Format: Patent
• Language: Chinese; English
• Published: 16.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a flexible high-molecular polymer, a preparation method thereof and application of the flexible high-molecular polymer in a lithium battery, and belongs to the technical field of lithium ion battery materials. The preparation method of the flexible high-molecular polymer comprises the following steps: stirring and reacting polytetrahydrofuran glycol, 3-isopropyl-dimethyl benzyl isocyanate, sorbitol and N, N-dimethyl benzylamine under the protection of nitrogen to obtain a product I; adding N-methyl pyrrolidone into the product I, and stirring for reaction to obtain a product II; adding the product II into chloroform, stirring and reacting to obtain a product III, adding the product III into N-methyl pyrrolidone, and stirring and reacting to obtain a product IV; and adding the product IV into PVDF-HFP, and carrying out a stirring reaction to obtain the flexible high-molecular polymer. According to the invention, the problems of low mechanical strength and low conductivity when the solid