Coupling effect between ultra-small Mn3O4 nanoparticles and porous carbon microrods for hybrid supercapacitors

Rutao Wang, Pan Liu, Junwei Lang, Li Zhang, Xingbin Yan

    Research output: Contribution to journalArticlepeer-review

    43 Citations (Scopus)

    Abstract

    Hybrid supercapacitor, which is an energy storage device that combines a low-energy/fast double-layer electrode and a high-energy/sluggish faradaic redox electrode, could realize further gains in energy/power density if the capacity and rate gaps of the two electrodes are properly balanced. Herein, a microrod-like architecture that incorporates Mn3O4 nanoparticles on/in highly porous carbon rods (PCR) scaffold (denoted as Mn-PCR composite) is designed for this purpose. The optimized Mn-PCR composite exhibits large Li-ion storage capacity and fast charge/discharge rate, mainly stemming from its distinct microrod-like architecture and porous structure. We then employ Mn-PCR composite as the anode and PCR as the cathode to fabricate a hybrid supercapacitor, which yields an ultrahigh energy density of 174 W h kg−1 at 200 W kg−1 and retains 74.5 W h kg−1 at a high power density of 10 kW kg−1.

    Original languageEnglish
    Pages (from-to)53-60
    Number of pages8
    JournalEnergy Storage Materials
    Volume6
    DOIs
    Publication statusPublished - 2017 Jan 1

    Keywords

    • Energy storage
    • Hybrid supercapacitor
    • Manganese oxide
    • Microstructure
    • Porous carbon

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Materials Science(all)
    • Energy Engineering and Power Technology

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