LITHIUM-CONTAINING NICKEL-MANGANE MIXED OXIDE, MANUFACTURING PROCESS FOR IT AND POSITIVE BODY, SECONDARY BATTERY AND ELECTRICAL DEVICE THEREIN
Patent Information
- Application Number
- DE602022031410
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-09-08
- Publication Date
- 2026-02-25
- Estimated Expiration
- 2042-09-08
AI Technical Summary
Cobalt-free spinel type LiNi0.5Mn1.5O4 positive electrode active materials face compatibility issues with conventional electrolytic solutions due to high operating voltage, leading to side reactions, interface deterioration, and poor cycling stability, primarily due to sharp edges and high stress corrosion.
A lithium nickel manganese-containing composite oxide with a rounded spherical or spherical-like grain shape, doped with elements like Si, P, and transition metals, is prepared through controlled sintering processes to enhance structural stability and reduce corrosion, featuring a monocrystal or quasi-monocrystal morphology.
The composite oxide significantly reduces electrolyte corrosion and interface impedance, improving specific capacity, cycling stability, and energy density of secondary batteries, while maintaining resistance to stress corrosion and extending service life.