Positive electrode active material, method for manufacturing positive electrode active material, and secondary battery
US11616231B2 · kind B2 · utility
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30Claims
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Key dates
| Filing date | May 23, 2022 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | May 23, 2042 |
Classification
- Technology area (CPC —)General
Abstract
A positive electrode active material having high capacity and excellent cycle performance is provided. The positive electrode active material has a small difference in a crystal structure between the charged state and the discharged state. For example, the crystal structure and volume of the positive electrode active material, which has a layered rock-salt crystal structure in the discharged state and a pseudo-spinel crystal structure in the charged state at a high voltage of approximately 4.6 V, are less likely to be changed by charge and discharge as compared with those of a known positive electrode active material.
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