Abstract Na3V2(PO4)3 suffers from poor performance and cyclability arising from low electronic conductivity. Na3V2(PO4)3 nanosheets have been successfully synthesized by a hydrothermal method and coated with a carbon layer from β-cyclodextrin. The NVP/C nanocomposite shows superior high-rate and ultralong-lifespan performances owning to large number of oxygenous groups from β-cyclodextrin, which are beneficial to a uniform adsorption on the surface of electrode materials. The NVP/C delivers 74 mAh g−1 even after 2000 cycles at a rate of 20 C and an exceptional rate performance (66 mAh g−1at 50 C).

中文翻译：

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Na3V2(PO4)3/C纳米复合材料作为钠离子电池正极的稳定而优越的性能

摘要 Na3V2(PO4)3 的电子电导率低，导致其性能和循环性较差。Na3V2(PO4)3 纳米片已通过水热法成功合成，并涂有 β-环糊精的碳层。由于来自β-环糊精的大量含氧基团，NVP/C纳米复合材料表现出优异的高倍率和超长寿命性能，有利于电极材料表面的均匀吸附。即使在 20 C 倍率下循环 2000 次后，NVP/C 也能提供 74 mAh g-1 和出色的倍率性能（66 mAh g-1 at 50 C）。