锂二次电池及制造锂二次电池的方法
By employing a solid-liquid hybrid electrolyte membrane in lithium secondary batteries, combined with a nonwoven substrate and a porous structure layer, the short-circuit risk of liquid electrolytes and the low conductivity of solid electrolytes are solved, enabling a thinner, stronger, and higher energy density battery design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2021-02-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium-ion batteries pose a short-circuit risk when using liquid electrolytes, and when using solid electrolytes, they suffer from low ionic conductivity and insufficient mechanical strength, making it difficult to achieve high energy density and improved processability.
A solid-liquid hybrid electrolyte membrane is adopted, which includes a non-woven mesh substrate layer and a porous structure layer. Solid polymer particles are dispersed in the microporous structure, and liquid electrolyte is mixed in. Polymer fibrils form the microporous structure. The liquid electrolyte accounts for 50-70 wt% and provides mechanical strength and ionic conductivity through the non-woven mesh substrate.
A thinner electrolyte membrane is achieved while improving mechanical strength and ionic conductivity, providing high energy density lithium secondary batteries, avoiding short-circuit risks, and eliminating the need for binder polymers.
Smart Images
Figure CN115136374B_ABST