Abstract
Rhombohedral Li2.4Na0.6V2(PO4)3@C nanoplates are synthesized by a simple sol–gel method. The almost single rhombohedral phase nature of Li2.4Na0.6V2(PO4)3@C along with nanoplate structure leads to high specific capacity and rate capability, and a remarkable cycling performance. As cathode materials for lithium-ion batteries, rhombohedral Li2.4Na0.6V2(PO4)3@C nanoplates deliver a high initial discharge capacity of 121.6 mAh g−1 and an excellent capacity retention of 95.6% after 200 cycles at a rate of 1 C in a potential range of 3.0–4.3 V. Even at a high rate of 10 C, an initial discharge capacity of 115.3 mAh g−1 and a capacity retention of 76.7% after 500 cycles are observed. The outstanding electrochemical performance is attributed to the synergetic effect of stable rhombohedral phase, nanoplate structure and uniform carbon coating layer.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Nos. 51661009, 21363005 and 51371061) and the Natural Science Foundation of Guangxi Province (2016GXNSFGA380001).
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Li, M., Zuo, Z., Deng, J. et al. Rhombohedral Li2.4Na0.6V2(PO4)3@C nanoplates as high-rate and long-life cathode materials for lithium-ion batteries. J Mater Sci 53, 10327–10337 (2018). https://doi.org/10.1007/s10853-018-2302-8
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DOI: https://doi.org/10.1007/s10853-018-2302-8