Designing a P2-type cathode material with Li in both Na and transition metal layers for Na-ion batteries |
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| Affiliation: | 1.China Institute of Atomic Energy, Beijing 102413, China;2.State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | P2-type layered oxides have been considered as promising cathode materials for Na-ion batteries, but the capacity decay resulting from the Na+/vacancy ordering and phase transformation limits their future large-scale applications. Herein, the impact of Li-doping in different layers on the structure and electrochemical performance of P2-type Na0.7Ni0.35Mn0.65O2 is investigated. It can be found that Li ions successfully enter both the Na and transition metal layers. The strategy of Li-doping can improve the cycling stability and rate capability of P2-type layered oxides, which promotes the development of high-performance Na-ion batteries. |
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| Keywords: | Na0 7Ni0 35Mn0 65O2 Li-doping P2-type cathode Na-ion batteries |
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