Negative electrode for rechargeable lithium battery and rechargeable lithium battery including same
By employing a carbon and silicon layer structure within a porous substrate in the negative electrode current collector of a rechargeable lithium battery, the contradiction between current collector density and resistance is resolved, the adhesion strength and interfacial resistance are improved, and high energy density and excellent battery performance are achieved.
Patent Information
- Application Number
- CN202511540526.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2025-10-17
- Filing Date
- 2025-10-27
- Publication Date
- 2026-05-01
AI Technical Summary
The current collector of the negative electrode in existing rechargeable lithium batteries presents a trade-off between increasing density and reducing internal resistance, which affects energy density and battery performance.
A porous substrate is used instead of metal foil, containing a carbon layer and a silicon layer structure. The carbon layer includes a first porous substrate and a carbon-based material, and the silicon layer includes a second porous substrate and a silicon-based negative electrode active material, forming a carbon-silicon layer stacked structure, which improves adhesion strength and reduces interface resistance.
It enhances the electrochemical stability and efficiency of the battery, improves capacity retention, reduces internal resistance, supports high-power and long-duration applications, and facilitates the development of compact and lightweight batteries.