期刊
ELECTROCHIMICA ACTA
卷 256, 期 -, 页码 19-27出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.09.129
关键词
molybdenum diselenide; core/branch simultaneous construction; lithium ion batteries; anode material
资金
- NNSF of China [51472120, 51772156]
- China Postdoctoral Science Foundation [2014M561651, 2015T80554]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1401003B]
- Fundamental Research Funds for the Central Universities [30917015102, 30916014103]
- Natural Science Foundation of Jiangsu Province [BK20171423]
- Jiangsu Key Laboratory for Environment Functional Materials [SJHG1303]
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials [51472101]
- PAPD of Jiangsu
Here, we report a one-step simultaneous-construction approach to synthesize N-doped carbon@MoSe2 core/branch nanostructures by heating a mixture of MoO3/PANI hybrids and Se powders in argon atmosphere, without requiring a cumbersome multi-step process or highly toxic reducing agents. It is found that in the construction process, PANI played a crucial role in the reduction of MoO3 and Se to form MoSe2 nanosheet branches, while PANI itself was decomposed and carbonized into N-doped carbon nanorod cores. Interestingly, the coexistence of 1D and 2D nanostructures in the N-doped carbon@MoSe2 core/branch system leads to excellent lithium storage performance, including a large discharging capacity of 1275 mA h g(-1), a high reversible lithium extraction capacity of 928 mA h g(-1) and a coulombic efficiency of 72.8%. After 100 cycles, the NDC@MS electrode still delivers a reversible capacity of 906 mA h g(-1) with a capacity retention ratio of 97.6%. The superior electrochemical properties can be attributed to the unique core/branch nanostructure of NDC@MS and the synergistic effect between the N-doped carbon nanorod cores and MoSe2 nanosheet branches. (C) 2017 Elsevier Ltd. All rights reserved.
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