补锂材料及其制备方法、正极极片和二次电池
By using lithium-rich compound core doping catalytic grains in lithium-ion batteries to form more grain boundaries and reduce decomposition voltage, the problem of irreversible capacity loss during the first charge and discharge of lithium-ion batteries is solved, thus improving the electrochemical performance and stability of the batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN DYNANONIC INNOVAZONE NEW ENERGY TECH CO LTD
- Filing Date
- 2023-02-20
- Publication Date
- 2026-07-17
AI Technical Summary
During the first charge and discharge cycle, existing lithium-ion batteries consume lithium ions due to the formation of a solid electrolyte interface film, resulting in irreversible capacity loss and reduced energy density. At the same time, commonly used lithium replenishment materials have high decomposition voltages and release oxygen, affecting battery stability and safety.
Using lithium-rich compounds as the core, and doping with catalytic grains such as LiI, LiF, LiCl, and LiBr, more grain boundaries are formed, reducing the lithium-ion decomposition voltage. The coating layer isolates redox reactions, thereby improving the lithium-ion transfer rate and battery stability.
It improves the electrochemical performance of lithium batteries, especially their specific capacity, reduces oxygen release, avoids irreversible structural changes, and enhances the structural stability and cycle stability of the batteries.
Smart Images
Figure CN116504933B_ABST