A positive electrode material, a preparation method of the positive electrode material, a positive electrode sheet, and a battery
CN117673259BActive Publication Date: 2026-08-28ZHUHAI COSMX BATTERY CO LTD
Patent Information
- Application Number
- CN202211045711.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-30
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2042-08-30
AI Technical Summary
Technical Problem
[0005]本发明实施例提供一种正极材料、正极材料的制备方法、正极片及电池，以解决现有技术中正极材料容量较低
Benefits of technology
[0023]本发明实施例中，含钠氧化物在初始电压至截止电压的相变过程中，形成有第一特征峰和第二特征峰，第一特征峰的角度范围小于第二特征峰的角度范围，这样在相同的电压下含钠氧化物可以脱出更多的锂离子，从而提升了正极材料的容量，并提升了正极材料的倍率性能和循环性能。
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Abstract
The application provides a positive electrode material, a preparation method of the positive electrode material, a positive electrode sheet and a battery. The positive electrode material comprises sodium-containing oxide. An angle range of a first characteristic peak of the sodium-containing oxide is smaller than an angle range of a second characteristic peak. The first characteristic peak is a characteristic peak of the sodium-containing oxide at an initial voltage, and the second characteristic peak is a characteristic peak of the sodium-containing oxide at a cut-off voltage. The chemical formula of the sodium-containing oxide is Li x Na 1‑x Co 1‑z M z O2; M comprises a metal element or a non-metal element, and 0.70
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Citation Information
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