期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 8, 页码 4075-4083出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta00236j
关键词
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资金
- Guangxi University of science and technology research [KY2015ZD051]
- Guilin University of Technology research start-up funds [002401003418]
- Guangxi Natural Science Foundation [2015GXNSFCA139018]
New conceptions of developing various nanostructure materials supported on conductive substrates are urgently required for additive-free integrated electrodes for lithium ion batteries (LIBs). In this work, Mo-doped SnS2-based nanosheets were directly grown on a conductive substrate, carbon cloth, via a facile hydrothermal method. Significantly, the as-synthesized samples possess a three-dimensional network structure consisting of interconnected nanosheets, which can be directly employed as additive-free integrated electrodes for LIBs. The as-obtained CC@Sn0.9Mo0.1S2 nanosheets exhibit initial high discharge and charge capacities of 2033.6 and 1869.8 mA h g(-1) at a current density of 1 A g(-1), with a coulombic efficiency of 91.9%. A high reversible discharge capacity of 1950.8 mA h g(-1) is obtained after 200 cycles. Moreover, a high reversible capacity of 914.5 mA h g(-1) is achieved even at a high current density of 5 A g(-1), which significantly exceeds the theoretical capacity of commercial graphite and reversible capacity of SnS2. A full lithium ion battery was assembled composed of the CC@Sn0.9Mo0.1S2 anode and a commercial LiCoO2 cathode, which also delivered high capacity and cycling stability. The excellent electrochemical lithium storage performance of Mo-doped SnS2 could be attributed to the molybdenum doping, which limited the number of layers of the nanosheets, enlarged the interlayer spacing and generated rich defects.
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