期刊
NANOSCALE ADVANCES
卷 1, 期 5, 页码 1957-1964出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9na00019d
关键词
-
资金
- Natural Science Foundation of China [11174197, 11574203]
Molybdenum disulfide (MoS2) shows high capacity but suffers from poor rate capability and rapid capacity decay, which greatly limit its practical applications in lithium-ion batteries. Herein, we successfully prepared MoS2 nanosheet hollow spheres encapsulated into carbon and titanium dioxide@graphite, denoted as TiO2@G@MoS2@C, via hydrothermal and polymerization approaches. In this hierarchical architecture, the MoS2 hollow sphere was sandwiched by graphite and an amorphous carbon shell; thus, TiO2@G@MoS2@C exhibited effectively enhanced electrical conductivity and withstood the volume changes; moreover, the aggregation and diffusion of the MoS2 nanosheets were restricted; this advanced TiO2@G@MoS2@C fully combined the advantages of a three-dimensional architecture, hollow structure, carbon coating, and a mechanically robust TiO2@graphite support, achieving improved specific capacity and long-term cycling stability. In addition, it exhibited the high reversible specific capacity of 823 mA h g(-1) at the current density of 0.1 A g(-1) after 100 cycles, retaining almost 88% of the initial reversible capacity with the high coulombic efficiency of 99%.
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