A lithium ion battery composite separator and a method for preparing the same
By using a core-shell structure of acid-activated silicate nanotubes and cyclic phosphazene derivatives, the problems of low thermal stability and low ion conduction efficiency of lithium-ion battery separators at high temperatures were solved, and the dimensional stability and ion transport performance of the separators at high temperatures were improved, meeting the requirements of high-power lithium-ion batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG UNIV OF TECH
- Filing Date
- 2026-05-19
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium-ion battery separators lack thermal stability at high temperatures, and traditional ceramic coatings have limited functionality and low ion conduction efficiency, failing to meet the requirements of high-power lithium-ion batteries.
A core-shell structure combining acid-activated silicate nanotubes and cyclic phosphazene derivatives is employed, which forms a heat-resistant framework and a flame-retardant barrier through covalent bonding. This promotes the interaction of lithium-ion solvation structures, improves ion transport efficiency, and enhances electrolyte affinity.
Maintaining membrane size stability at high temperatures reduces the risk of battery thermal runaway, improves ion conductivity and lithium-ion transference number, enhances electrolyte wettability, strengthens mechanical properties, and meets the requirements of high-power lithium-ion batteries.
Smart Images
Figure CN122418218A_ABST