一种多重主动安全防护隔膜及其制备方法和应用
By loading polymer microspheres and polydopamine layers onto the lithium-ion battery separator substrate, the problem of thermal runaway of the separator at high temperatures is solved, achieving multiple active safety protections and improving the safety and electrochemical performance of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUNAN XIANGDIAN POWER TEST & RES TECH LTD
- Filing Date
- 2022-11-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium-ion battery separators are prone to thermal shrinkage and rupture at high temperatures, leading to thermal runaway and posing safety hazards. Furthermore, traditional ceramic-coated separators still have shortcomings in terms of thermal stability and electrolyte compatibility.
First and second polymer microsphere layers are loaded on the surface of the separator substrate and covered with a polydopamine layer. The polymer microsphere layer melts at high temperature to seal the lithium-ion transport channels, and the polydopamine layer provides flame retardant and anti-reignition functions. Combined with the core material, this further prevents the battery from catching fire and exploding.
It improves the high-temperature thermal stability and hydrophilicity of the separator, achieves multiple active safety protections, prevents battery thermal runaway, and enhances the safety performance of lithium-ion batteries.
Smart Images
Figure CN115714238B_ABST