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
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Patent Information

Application Number
PCT/JP2025/037427
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-11-28
Filing Date
2025-10-24
Publication Date
2026-06-04

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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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Citation Information

Patent Citations

  • Lithium battery anode material and preparation method and application thereof

    CN109860588A

  • Lithium-nickel-based positive electrode active material, method for producing the same, and lithium secondary battery including the same

    JP2017504947A

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    WO2024004687A1

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    WO2024004710A1