We report nitrogen-doped carbon-coating to increase rate capability and cycle stability of NaCrO₂ cathode for sodium ion battery application. The nitrogen-doped carbon coating layer can effectively reduce electrode surface impedance and accelerate Na⁺ ion diffusion to allow high-rate performance. The coating layer can suppress the electrode/electrolyte side reactions and inhibit the degradation of NaCrO₂, thereby markedly enhancing cathode cycling stability. Consequently, the NaCrO₂ cathode exhibits a specific capacity of 95.6mAh/g at 50C and a capacity retention of 91.4 % after 1000 cycles at 10C.

中文翻译：

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氮掺杂碳涂层可实现钠离子电池用 NaCrO2 阴极的高速性能和长循环稳定性


我们报道了氮掺杂碳涂层可以提高钠离子电池应用中 NaCrO₂ 阴极的倍率能力和循环稳定性。氮掺杂碳涂层可有效降低电极表面阻抗并加速 Na⁺ 离子扩散，以实现高倍率性能。涂层可以抑制电极/电解质的副反应，抑制 NaCrO₂ 的降解，从而显着增强阴极循环稳定性。因此，NaCrO₂ 阴极在 50C 下表现出 95.6mAh/g 的比容量，在 10C 下循环 1000 次后容量保持率为 91.4%。