Method for producing positive electrode active material for nonaqueous electrolyte secondary battery, positive electrode active material for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery
A controlled heat-treatment process for lithium transition metal composite oxides with high Ni content stabilizes the crystal structure, addressing resistance and cycle characteristic issues, achieving high capacity and low resistance in non-aqueous electrolyte secondary batteries.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
- Filing Date
- 2025-12-15
- Publication Date
- 2026-07-02
AI Technical Summary
Lithium transition metal composite oxides with high Ni content face issues of increased battery resistance and deteriorated cycle characteristics due to Mn dissolution and spinel phase precipitation during charging and discharging, which hinder achieving high battery capacity and improved cycle characteristics.
A manufacturing method involving controlled heat-treatment processes for a Ni-containing hydroxide and Li-containing compound, including specific temperature ranges and oxygen stream firing, to produce a lithium transition metal composite oxide with a stable crystal structure and high particle strength, minimizing Mn leaching and spinel phase formation.
The method enables high battery capacity with low resistance and improved cycle characteristics by stabilizing the crystal structure and preventing Mn dissolution, thus enhancing the performance of non-aqueous electrolyte secondary batteries.
Smart Images
Figure JP2025043617_02072026_PF_FP_ABST