Co9S8 nanoparticles encapsulated in nitrogen-doped mesoporous carbon networks with improved lithium storage properties

Jawayria Mujtaba, Hongyu Sun, Guoyong Huang, Yanyan Zhao, Hamidreza Arandiyan, Guoxing Sun, Shengming Xu, Jing Zhu

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We report the designed synthesis of unique Co9S8 nanoparticles encapsulated in nitrogen-doped mesoporous carbon networks (Co9S8@NMCN nanocomposites). Uniform zeolitic imidazolate framework-67 was first synthesized and then transformed into Co9S8@NMCN nanocomposites by thermal annealing with sulfur powders in an Ar atmosphere. The structural and compositional analysis were conducted by employing X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), which show that each Co9S8 nanoparticle is well encapsulated in nitrogen-doped carbon layers. When evaluated as an anode material for LIBs, the as-prepared composite electrodes delivered superior capacity, excellent cycling stability and rate capability, which are attributed to the advantageous structural features.
    Original languageEnglish
    JournalRSC Advances
    Volume6
    Issue number38
    Pages (from-to)31775-31781
    Number of pages7
    ISSN2046-2069
    DOIs
    Publication statusPublished - 2016

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