Nanocellulose ceramic hybrid coated separator
By modifying the acylhydrazone bonds of the nanocellulose ceramic-coated separator through grafting and dopamine coating, the problems of easy detachment and insufficient thermal stability of the ceramic-coated separator were solved, achieving high interfacial bonding and good ion transport, thus improving the safety and performance of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 宁波大浦新材料科技有限公司
- Filing Date
- 2026-04-10
- Publication Date
- 2026-06-26
AI Technical Summary
Existing ceramic-coated separators are prone to microcracks and coating peeling during battery production and long-term cycling, affecting battery safety and performance, and it is difficult to balance flexibility and thermal stability.
A nanocellulose ceramic coating membrane is used. The carboxylated nanocellulose is modified by grafting with hydrazone bonds and biomimetic mineralization treatment. Combined with dopamine to coat inorganic ceramic particles, a strong interfacial bond is formed. The porous structure of nanocellulose improves ion transport channels and electrolyte wettability.
It significantly improves the interfacial bonding between the composite coating and the porous polymer base film, prevents coating peeling, improves the thermal stability and ion transport efficiency of the battery, and ensures battery safety and performance stability.
Smart Images
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