Positive electrode active material for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, and method for manufacturing positive electrode active material for non-aqueous electrolyte secondary battery
A lithium transition metal composite oxide with 65 mol% Ni, balanced Ca and Sr, and uniform P distribution within secondary particles addresses reactivity issues, enhancing battery stability and performance under high temperatures.
WO2026115974A1PCT designated stage Publication Date: 2026-06-04PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
- Filing Date
- 2025-10-24
- Publication Date
- 2026-06-04
Smart Images
Figure JP2025037427_04062026_PF_FP_ABST
Abstract
A positive electrode active material for a nonaqueous electrolyte secondary battery according to one embodiment of the present invention contains Ca, Sr, Pa, and a lithium transition metal composite oxide that contains 65 mol% or more of Ni and assumes the form of secondary particles formed by aggregation of primary particles. The ratio ICa_OUT / ICa_IN of the normalized intensity ICa_OUT of Ca on the surface of the secondary particles to the normalized intensity ICa_IN of Ca inside the secondary particles is 2 to 7, the ratio ISr_OUT / ISr_IN of the normalized intensity ISr_IN of Sr on the surface of the secondary particles to the normalized intensity ISr_IN of Sr inside the secondary particles is 2 to 7, and the Gini coefficient of PO3- inside the secondary particles is 0.6 or less.
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