Facile synthesis of graphene-molybdenum dioxide and its lithium storage properties

Kuok Hau Seng, Guo Dong Du, Li Li, Zhi Xin Chen, Hua Kun Liu, Zai Ping Guo

    Research output: Contribution to journalArticlepeer-review

    56 Citations (Scopus)

    Abstract

    Graphene-molybdenum dioxide composites in several ratios have been prepared through a facile synthesis method. Depending on the ratio, the as synthesized composites have either 2-dimensional graphene sheets with MoO2 particles anchored to them or a clustered agglomerate morphology. The composites have been characterised using Raman spectroscopy, X-ray diffraction, and electron diffraction to confirm the monoclinic MoO2 phase that is present. Lithium storage properties of the as-synthesised samples were tested in a coin-type half cell assembly to determine the relationship between the ratio and the electrochemical performance. The sample with highest amount of MoO2 (78 wt%) displayed the most promising lithium storage properties, with stable cycling performance at 0.2 A g(-1) that shows negligible capacity loss over 50 cycles, retaining a capacity of 640 mA h g(-1). The rate capabilities were also tested, and show a capacity of 380 mA h g(-1) at 2.0 A g(-1), which is comparable to the theoretical capacity of graphite and previously reported work on similar materials.
    Original languageEnglish
    Pages (from-to)16072-16077
    Number of pages6
    JournalJournal of Materials Chemistry
    Volume22
    Issue number31
    DOIs
    Publication statusPublished - 2012

    Keywords

    • carbon
    • cyclic performance
    • electrodes
    • high capacity
    • ion battery anodes
    • li storage
    • nanocomposites (materials)
    • nanosheets
    • nanotubes

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