Separator for rechargeable lithium battery and rechargeable lithium battery comprising the same
By using a combination of less than 70 wt% boron nitride coating and polyvinylidene fluoride binder on a porous substrate, the problems of uneven mechanical strength and heat dissipation of ceramic-coated separators are solved, achieving efficient heat management and electrode adhesion strength, which is suitable for rechargeable lithium batteries.
Patent Information
- Application Number
- CN202511813875.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-12-20
- Filing Date
- 2025-12-04
- Publication Date
- 2026-06-23
AI Technical Summary
Existing ceramic-coated separators in rechargeable lithium batteries suffer from insufficient mechanical strength and uneven heat dissipation, leading to a decrease in the adhesion strength between the separator and the electrode during long-term charging and discharging.
A coating layer containing less than 70 wt% boron nitride, combined with polyvinylidene fluoride adhesive, is formed on a porous substrate to improve the mechanical strength and thermal stability of the diaphragm, ensuring uniform heat distribution and electrode adhesion strength.
Even at a thin thickness, the coating can effectively dissipate heat, maintain the adhesion strength of the electrodes, and improve the mechanical strength and thermal stability of the separator, making it suitable for high-efficiency rechargeable lithium battery operation.
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Figure CN122267436A_ABST
Abstract
Citation Information
Patent Citations
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KR1020010000107A