A positive electrode active material, a positive electrode sheet, a secondary battery, and an electric device
CN119517946BActive Publication Date: 2026-01-27CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Patent Information
- Application Number
- CN202311070156.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-23
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2043-08-23
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Figure CN119517946B_ABST
Abstract
The application provides a positive electrode active material, a positive electrode sheet, a secondary battery and a power device. The positive electrode active material comprises (i) secondary particles mainly aggregated by primary particles and (ii) single crystal or single crystal-like particles, wherein the secondary particles further contain an M1 element, the M1 element contains a transition metal element other than iron, the mass content of the M1 element is X1 based on the total mass of the secondary particles, 500 ppm ≤ X1 ≤ 5000 ppm, and optionally 800 ppm ≤ X1 ≤ 2000 ppm; and the single crystal or single crystal-like particles contain an Ma element, the Ma element contains a transition metal element other than iron, the mass content of the Ma element is X2 based on the total mass of the single crystal or single crystal-like particles, and X2 is less than X1.
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Citation Information
Patent Citations
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