NiS2 nanospheres coated by nitrogen-doped carbon for enhanced sodium storage performance
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- NiS2 nanospheres coated by nitrogen-doped carbon for enhanced sodium storage performance
- 发表刊物：
- Journal of Alloys and Compounds
- 摘要：
- Nickel disulfide is used as anode material for sodium-ion batteries, with low cost, abundant reserves, and a wide variety of theoretical specific capacities as high as 870 mAh g-1. However, large volume expansion and low ionic conductivity during Na+ intercalation and deintercalation lead to poor electrochemical perfor-mance. This work has synthesized carbon layer-coated and N-doped NiS2 nanospheres through PVP-assisted hydrothermal and subsequent annealing processes, reducing volume expansion and improving electrical conductivity and Na+ storage activity, increasing ion diffusion kinetics during electrochemical charge -dis-charge in excellent specific capacity and cycle stability. When evaluated as a negative electrode for Sodium -ion batteries (SIBs), it exhibits excellent specific capacity (554.3 mAh g-1 at 0.2 A g-1, first-cycle coulombic efficiency of 92.3 %), and excellent long-cycle stability (436.3 mAh g-1 at 1 A g-1 for 800 cycles), demon-strating the potential of NiS2@NC as an ideal anode material for SIBs.
- 合写作者：
- W.X. Zhang , J.H. Zhang , J.Q. Guo C. He ⁎, J.R. Wen
- 卷号：
- 937 (2023) 168379
- 页面范围：
- 937 (2023) 168379
- 是否译文：
- 否
- 发表时间：
- 2023-03-15