高粘结性隔膜无氟涂布液及其制备方法与应用
Modified acrylic emulsion prepared by copolymerization reaction is used for bonding lithium battery separators and electrodes, which solves the problems of toxic solvents and poor flexibility of PVDF binders. It realizes a fluorine-free aqueous coating liquid with high bonding strength and flexibility, and improves the safety and life of lithium batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIESHOU CITY TIANHONG PACKAGING MATERIAL
- Filing Date
- 2026-02-12
- Publication Date
- 2026-07-17
AI Technical Summary
In current lithium battery manufacturing, polyvinylidene fluoride (PVDF) binders use the toxic solvent N-methylpyrrolidone (NMP), which has poor flexibility and makes it difficult to improve the bonding strength and flexibility between the separator and the electrode.
A modified acrylic emulsion was prepared by copolymerization of hydroxy acrylate monomers, N-vinylcaprolactam and 1,1,3,3-tetramethyl-1,3-divinyldisilazane, and an antifoaming agent was added to prepare a fluorine-free aqueous coating solution for bonding the diaphragm and the electrode.
It improves the bonding strength between the separator and the electrode, enhances the flexibility of the separator, improves the safety and cycle life of lithium batteries, and reduces cost and environmental risks.