Abstract
The pure phase P2-Na2/3Ni1/3Mn2/3O2 was synthesized by a solid reaction process. The optimum calcination temperature was 850 °C. The as-prepared product delivered a capacity of 158 mAh g−1 in the voltage range of 2–4.5 V, and there was a phase transition from P2 to O2 at about 4.2 V in the charge process. The P2 phase exhibited excellent intercalation behavior of Na ions. The reversible capacity is about 88.5 mAh g−1 at 0.1 C in the voltage range of 2–4 V at room temperature. At an elevated temperature of 55 °C, it could remain as an excellent capacity retention at low current rates. The P2-Na2/3Ni1/3Mn2/3O2 is a potential cathode material for sodium-ion batteries.
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Acknowledgments
This project was supported by Natural Science Foundation of LiaoNing Province, China (2014010044-301) and Natural Science Foundation of China (51172242).
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Guoqiang Liu and Lei Wen contributed equally to this work.
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Liu, G., Wen, L., Li, Y. et al. Synthesis and electrochemical properties of P2-Na2/3Ni1/3Mn2/3O2 . Ionics 21, 1011–1016 (2015). https://doi.org/10.1007/s11581-014-1249-2
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DOI: https://doi.org/10.1007/s11581-014-1249-2