Journal
ELECTROCHIMICA ACTA
Volume 269, Issue -, Pages 632-639Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.03.068
Keywords
Molybdenum disulfide; Microspheres; Polypyrrole coating; Core-shell structure; Lithium storage
Categories
Funding
- National Natural Science Foundation of China [21375016, 21475022, 21505019]
- Natural Science Foundations of Guangdong Province [2015A030310272]
- Technology Planning Project of Guangdong Province [2015B090927007]
- Guangdong Provincial Key Platform and Major Scientific Research Projects for Colleges and Universities [2014KZDXM073, 2014KTSCX181, 2015KCXTD029]
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Advanced anode materials for lithium ion batteries are central to the area of electrical energy storage devices. Herein, we have developed a two-step strategy for synthesizing MoS2@polypyrrole (MoS2@PPY) core-shell microspheres. In such a novel architecture, the MoS2 microspheres are homogeneously wrapped by conductive polypyrrole coating forming core-shell microspheres. As a preliminary test, the obtained MoS2@PPY microspheres exhibit greatly enhanced electrochemical performances for lithium storage compared with un-modified MoS2 microspheres. The MoS2@PPY microsphere electrode displays a high specific capacity of 1012 mAh g(-1) after 200 cycles at 200 mA g(-1) and high rate performance (600 mAh g(-1) at 4000 mA g(-1)). The superior electrochemical performances are attributed to the advantageous combination of hierarchical microsphere structure and conductive PPY coating. (c) 2018 Elsevier Ltd. All rights reserved.
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