Positive electrode active material for lithium secondary batteries, method for manufacturing the same, and lithium secondary battery containing the same
A nickel-containing lithium transition metal oxide with an Al and W coating layer addresses the issues of conventional NCM-based materials, enhancing capacity and high-temperature life by optimizing composition and particle strength in lithium secondary batteries.
Patent Information
- Authority / Receiving Office
- JP Ā· JP
- Patent Type
- Applications
- Current Assignee / Owner
- POSCO FUTURE M CO LTD
- Filing Date
- 2024-05-23
- Publication Date
- 2026-05-25
AI Technical Summary
Conventional NCM-based lithium composite transition metal oxides for lithium secondary batteries have large specific surface areas, low particle strength, high lithium by-product content, leading to gas generation, reduced lifespan, and stability issues, while single-particle cathode active materials suffer from larger crystal grain size and degraded capacitance characteristics.
A positive electrode active material in the form of a single particle, composed of a nickel-containing lithium transition metal oxide with an Al and W-containing coating layer, where Al and W content ranges from 2000 to 6000 ppm, with a ratio of 0.28 to 0.7, and a composition of nickel, cobalt, and manganese optimized to improve capacity and high-temperature life characteristics.
The solution results in improved capacity, high-temperature life, and stability of lithium secondary batteries by reducing gas generation and enhancing particle strength, with a compressed density of 2.2 g/cc and low residual lithium content, thereby increasing energy density and lifespan.
Smart Images
Figure 2026516520000001 
Figure 2026516520000002 
Figure 2026516520000003