期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 316, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2021.110924
关键词
NiCo2S4; Nitrogen doping; Sulfur carrier; Lithium-sulfur batteries
类别
资金
- Natural Science Foundation of Hebei Province, China [E2020202071]
- Nazarbayev University, Kazakhstan [110119FD4504, 091019CRP2114]
A composite sulfur cathode with high sulfur loading demonstrated stable and excellent charge/discharge capacity performance, showing great potential for improving the electrochemical performance of Li-S batteries.
To enhance the electrochemical performance of Li-S battery, a composite sulfur cathode was designed by doping sulfur onto N-doped carbon nanotubes with metal sulfide particles attached to their surface. This designing approach allowed performing high sulfur loading in the cathode, while maintaining prominent stability and good charge/discharge capacity. The results showed that at a sulfur loading of 2.1 mg cm(-2), the cell with S/NiCo2S4/N-CNT cathode delivered an average discharge capacity of 998 mA h g(-1) at 0.1C, and preserved an excellent discharge capacity of 713 mA h g(-1) at a high current density of 1 C. At the same time, the cell demonstrated high stability and reversibility delivering a capacity of 950 mA h g(-1) when current density reduced back again to 0.1C. Furthermore, the S/NiCo2S4/N-CNT cathode showed a steady capacity of 915 mA h g(-1) at 0.2C over 100 cycles.
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