Low-potential high-nickel lithium-rich oxide lithium supplement material and preparation method thereof
By preparing a single-phase solid solution Li2NixFe1-xO2, the problem of high delithiation potential in existing cathode lithium replenishment materials in lithium iron phosphate systems was solved, achieving the first coulombic efficiency improvement of lithium-ion batteries with high efficiency and safety, making them suitable for industrial production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN JIANQUAN NEW ENERGY TECH DEV CO LTD
- Filing Date
- 2026-03-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing cathode lithium replenishment materials have high delithiation potentials, which cannot fully delithiate within the conventional formation voltage range of the lithium iron phosphate system. This results in low initial coulombic efficiency and formation safety risks. Existing materials are not well-matched with the lithium iron phosphate system.
A single-phase solid solution Li2NixFe1-xO2 was prepared by co-precipitation. Fe element was doped into the Li2NiO2 lattice to form a low-potential, high-nickel, lithium-rich oxide lithium replenishment material. Combined with an oxygen atmosphere sintering process, its delithiation potential was controlled at 3.0–3.6V to ensure efficient lithium replenishment at low voltage.
It achieves compatibility with the lithium iron phosphate system, improves the first coulombic efficiency, avoids formation safety hazards, ensures battery capacity utilization and cycle stability, and the process is simple and easy to industrialize.
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