锂二次电池用正极活性材料、包含其的正极和锂二次电池
By doping or coating lithium nickel cobalt manganese oxides with metal compounds and controlling the grain size, nickel-based lithium composite metal oxide monomer particles were prepared, solving the problem of poor lifespan characteristics of NCMs at high voltages and achieving stable and efficient performance of batteries at high voltages.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2018-11-21
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium nickel cobalt manganese oxide (NCM) cathode active materials have poor lifespan characteristics at high voltages, leading to rapid deterioration of battery performance and failing to meet the requirements for stable use at high voltages.
Nickel-based lithium composite metal oxide monomer particles are prepared by doping them in the crystal lattice or coating them with a specific metal compound, controlling the metal content between 2500ppm and 6000ppm, and calcining them at temperatures above 960℃ to form grains of 180nm to 300nm, thereby reducing the reaction interface with the electrolyte.
It improves the lifespan characteristics and structural stability of lithium secondary batteries under high voltage, reduces side reactions, and enhances the high-voltage performance and high-temperature lifespan characteristics of the batteries.
Smart Images
Figure CN116154148B_ABST