Polyaniline‐derived N‐doped carbon‐composited Na₃V₂(PO₄)₃ (NVP@NC) are synthesized by a rheological phase reaction followed by calcination. The NVP@NC composite displays improved cycling and rate properties. Its discharge capacity remains 118.7 mAh g⁻¹ at the 400th cycle at 0.3 C. It also obtains invertible capacities of 93.7 and 91.1 mAh g⁻¹ at 5 and 10 C after 1000 cycles, with capacity retention rates of 92.7% and 98.4%, respectively. These enhanced results due to the N‐doped carbon layer (NC), which restrains the expansion and deformation of the crystal structure, reduce the transport length of sodium ion and electrons and improves the electroconductibility of NVP.

中文翻译：

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Na3V2（PO4）3 @ NC复合材料，以聚苯胺为正极材料，用于高倍率和超长寿命钠离子电池

聚苯胺衍生的N掺杂的碳复合Na ₃ V ₂（PO ₄）₃（NVP @ NC）是通过流变相反应然后煅烧合成的。NVP @ NC复合材料显示出改善的循环和速率特性。在0.3 C下的第400个循环中，其放电容量保持118.7 mAh g ^-1。在1000个循环后，其在5和10 C下的可逆容量也达到93.7和91.1 mAh g ^-1，容量保持率分别为92.7％和98.4％，分别。N掺杂碳层（NC）可以抑制晶体结构的膨胀和变形，减少钠离子和电子的传输长度，并改善NVP的导电性，从而提高了结果。