期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 96, 期 7, 页码 2190-2196出版社
WILEY-BLACKWELL
DOI: 10.1111/jace.12302
关键词
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资金
- Spaceflight Foundation of the People's Republic of China [N8XW0002]
- Graduate Starting Seed Fund of Northwestern Polytechnical University [Z2013146]
A graphene-supported Ce-SnS2 (Ce-SnS2/graphene) nanocomposite has been synthesized via a hydrothermal route. Structure, morphology, and electrochemical properties of the composites were studied by means of XRD, SEM, TEM, Raman, XPS, TGA, and electrochemical measurements. The Ce-SnS2 crystal particles with a flower-like structure were distributed on the graphene sheets (GNS). The particle sizes of each petal are in the range 50-100nm with clear lattice fringes. The atomic ratio of Sn, S, Ce, C, and O is estimated to be 1:2:0.05:3.11:0.64 and the content of Ce-SnS2 composite is 80 wt.% in the as-synthesized sample. The Ce-SnS2/graphene composite exhibits high initial discharge capacity (1638.3mAh/g at 0.5 C), high capacity retention (707mAh/g at 0.5 C after 50 cycles), and good rate capability due to the synergy effect between Ce-SnS2 nanoparticles and graphene nanosheets. The superior performance is ascribed to the presence of graphene keeping the structure stable.
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