Lithium secondary battery positive electrode active material and lithium secondary battery comprising the same
By using a bimodal lithium transition metal oxide combination in lithium secondary batteries, the problems of insufficient density and output characteristics of lithium-rich layered cathode materials were solved, thereby improving electrode energy density and battery life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- POSCO HLDG INC
- Filing Date
- 2024-12-17
- Publication Date
- 2026-07-17
AI Technical Summary
Lithium-rich layered cathode active materials have a high lithium content and a relatively low proportion of transition metals in their structure, resulting in low tap density and electrode density. Furthermore, the redox reaction easily generates oxygen, leading to insufficient electrode energy density and output characteristics.
The positive electrode active material for lithium secondary batteries with a bimodal structure includes a first lithium transition metal oxide and a second lithium transition metal oxide. By adjusting its particle size and weight ratio, the particle strength and electrode compaction density are improved, oxygen generation is suppressed, and the battery output characteristics are enhanced.
It significantly improves electrode energy density and battery output characteristics, extends battery life, and solves the problem of insufficient density and output characteristics of lithium-rich layered cathode materials in practical applications.
Smart Images
Figure CN122423005A_ABST