A separator for an electrochemical device and an electrochemical device including the separator.
By using an inorganic coating of PVAc and modified PVDF-based adhesive resin on the separator of a lithium-ion secondary battery, the problem of poor adhesion between the separator and the electrode is solved, the adhesion and electrochemical reaction efficiency of the battery are improved, and the battery life is extended.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2021-08-30
- Publication Date
- 2026-05-26
AI Technical Summary
The poor adhesion between the separator and the electrode in existing lithium-ion secondary batteries leads to insufficient electrochemical reactions and easy detachment during deformation, affecting battery performance and cycle life.
An inorganic coating comprising PVAc-based adhesive resin and modified PVDF-based adhesive resin is used to form a highly adhesive top layer on the surface of the separator through a phase separation process, thereby enhancing the adhesion between the separator and the electrode. The bonding of inorganic particles is ensured by controlling the coating composition and drying conditions.
It improves the adhesion between the separator and the electrode, prevents the separation of inorganic particles, reduces resistance and electrolyte viscosity, and enhances battery performance and lifespan.
Smart Images
Figure CN116057770B_ABST