1. The C─S/C═S Bonds Synergistically Modify Porous Hollow‐Carbon‐Nanocages Anode for Durable and Fast Sodium‐Ion Storage.
- Author
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Feng, Huiyan, Liu, Zhendong, Wang, Fei, Xue, Lingxiao, Li, Linqing, Ye, Chong, Zhang, Chengzhi, Liu, Quanbing, and Tan, Jun
- Subjects
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CARBON-based materials , *SODIUM ions , *ION channels , *ELECTRIC batteries , *ANODES , *SULFUR - Abstract
Sulfur doping in carbonaceous anode is a popular method to improve the sodium storing performance. Regulating the C/S bond effect of carbon atom with doped sulfur atom could understand and develop superior carbonaceous anode for sodium‐ion batteries. Therefore, this study designed porous hollow carbon nanocages with synergistically‐doped C/S bonds (C‐S/C = S) by secondary‐sulfidation. The secondary‐sulfidation is conducive to the different bond formation of sulfur atom with carbon skeleton and adjust the structure via removed other groups. Thus, the C‐S/C = S anode with synergistically C‐S and C = S bonds delivered a reversible capacity of 307 mAh g‐1 at 1.0 A g−1 with initial coulomb efficiency of 80.15%, a stable cycle life of 2000 cycles, and a fast charge capability of 186 mAh g−1 at 20.0 A g−1 in sodium‐ion batteries. Through characterization and simulation results, the doped C‐S/C = S bonds creates more active sites and ion diffusion channels in carbon skeleton for enhancing the fast and durable kinetics of sodium‐ion. This work provides deep insights into C/S bonds effect of carbon anode material for developing fast charge stability sodium‐ion batteries. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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