Gel polymer electrolyte for in-situ initiation polymerization of lithium salt as well as preparation method and application of gel polymer electrolyte

• Main Authors: ZHOU SUPING, GUAN TIANYU, ZHENG XIAOQIONG, LIANG FUHUI, XU ZELIN, HE RAN, DENG KUIRONG, LI MAOSHENG
• Format: Patent
• Language: Chinese; English
• Published: 17.05.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a gel polymer electrolyte for lithium salt in-situ initiated polymerization and a preparation method and application thereof, and relates to the field of lithium ion batteries. The preparation method comprises the following steps: uniformly mixing and stirring 1, 3, 5-trioxane, fluoroethylene carbonate, methyl trifluoroethyl carbonate, lithium difluoro (oxalato) borate and lithium bis (fluorosulfonyl) imide in sequence until the components are completely dissolved, then dropwise adding the mixture onto a glass fiber membrane, uniformly infiltrating the glass fiber membrane, heating the glass fiber membrane to generate an in-situ self-initiation polymerization reaction, and drying the glass fiber membrane to obtain the lithium ion battery positive electrode material. The gel polymer electrolyte subjected to in-situ initiated polymerization of the lithium salt is generated. The lithium salt lithium difluoro (oxalato) borate is adopted to initiate polymerization of 1, 3, 5-trioxane in sit