Positive electrode active material and method for preparing same
The development of a high-nickel content anode active material for lithium secondary batteries, utilizing a specific EELS analysis criterion and a controlled water treatment process, addresses the challenges of gas generation and surface damage, resulting in improved battery performance and lifespan.
Patent Information
- Application Number
- PCT/KR2024/013837
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-09-10
- Filing Date
- 2024-09-11
- Publication Date
- 2025-03-20
AI Technical Summary
High-nickel anode active materials in lithium secondary batteries face challenges due to high reactivity, leading to gas generation and surface damage during the manufacturing process, which affects battery performance and lifespan.
A positive electrode active material with a nickel content of 70 mol% or more, where the EELS analysis results for the particle surface satisfy a specific peak strength ratio, and a manufacturing method involving a water treatment process to effectively remove lithium by-products without damaging the particle structure.
The solution provides an anode active material with improved surface stability, reduced gas generation, and enhanced battery performance, including low initial resistance, long life, and high discharge capacity.