NiCo2S4 nanoparticles embedded in nitrogen-doped carbon nanotubes networks as effective sulfur carriers for advanced Lithium-Sulfur batteries

被引:13
作者
Song, Yanli [1 ]
Wang, Zhifeng [1 ]
Yan, Yajing [1 ]
Zhao, Weimin [1 ]
Bakenov, Zhumabay [2 ,3 ]
机构
[1] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China
[2] Nazarbayev Univ, Natl Lab Astana, Dept Chem & Mat Engn, Nur Sultan 010000, Kazakhstan
[3] Inst Batteries LLP, Nur Sultan 010000, Kazakhstan
关键词
NiCo2S4; Nitrogen doping; Sulfur carrier; Lithium-sulfur batteries; CATHODE; NANOCRYSTALS; POLYSULFIDES; CHALLENGES; POLYHEDRA; GRAPHENE; HYBRID; HOST;
D O I
10.1016/j.micromeso.2021.110924
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
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.
引用
收藏
页数:8
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