Formation of graphene-like 2D spinel MnCo2O4 and its lithium storage properties

Guoyong Huang, Xueyi Guo, Xiao Cao, Qinghua Tian, Hongyu Sun

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Two-dimensional (2D) materials fulfill the requirements for fast lithium storage due to the large exposed surface area and the open shortened path for Li insertion/extraction. Novel graphene-like 2D spinel MnCo2O4 powders have been synthesized, which inherit the morphology and structure of special metalorganic precursor (MeO2C2H4) (Me = Co and Mn). When tested in an electrochemical system, it delivers high initial discharge capacities of 1157.3 mAhg-1 at 0.2 Ag-1 and 1006.3 mAhg-1 at 0.4 Ag-1; and also exhibits advanced capacity retention and superior rate performance (~780.0 mAhg-1 at 0.2 Ag-1 and ~550.0 mAhg-1 at 0.4 Ag-1 after 200 cycles). Remarkably, the 2D layered structure is retained perfectly after 200 cycles at 0.4 Ag-1. Hence, the type of unique self-assembly metal-organic precursors could provide a flexible and general way to synthesize 2D layered metal oxides as templates for high-performance lithium-ion batteries.
    Original languageEnglish
    JournalJournal of Alloys and Compounds
    Volume695
    Pages (from-to)2937-2944
    Number of pages8
    ISSN0925-8388
    DOIs
    Publication statusPublished - 2017

    Keywords

    • MnCo2O4
    • Graphene-like
    • Two-dimensional
    • Spinel
    • Metal-organic precursor
    • Energy storage materials

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