掺氮碳涂层实现了钠离子电池 NaCrO2 正极的高倍率能力和长循环稳定性

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL Applied Surface Science Pub Date : 2024-11-15 DOI:10.1016/j.apsusc.2024.161804

Jingyao Cai, Yan Wei, Yanbing Zhu, Liyuan Tian, Jiandong Zhang, Yan Shen, Mingkui Wang

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引用次数: 0

摘要

我们报告了掺氮碳涂层如何提高钠离子电池应用中 NaCrO2 阴极的速率能力和循环稳定性。掺氮碳涂层能有效降低电极表面阻抗，加速 Na+ 离子扩散，从而实现高倍率性能。涂层能抑制电极/电解质副反应，抑制 NaCrO2 的降解，从而显著提高阴极循环稳定性。因此，NaCrO2 阴极在 50C 下的比容量为 95.6mAh/g，在 10C 下循环 1000 次后的容量保持率为 91.4%。

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Nitrogen-doped carbon-coating enables high-rate capability and long-cycle stability of NaCrO2 cathode for sodium-ion battery

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.

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.