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Amorphous FeOOH nanorods and Co3O4 nanoflakes as binder-free electrodes for high-performance all-solid-state asymmetric supercapacitor

Abstract

We have built a high-performance supercapacitors anode based on carbon fabric(CF), vertically aligned graphene nanosheets (VAGN) and FeOOH nanorods. This CF/VAGN/FeOOH electrode can charge/discharge at a low potential window (0 to -1.1V vs. Hg/HgO), and demonstrates a high specific capacitance of 909 F/g aided by the unique structure of VAGN. Additionally, we made an all-solid-state asymmetric supercapacitor by assembling CF/VAGN/FeOOH and CF/Co3O4 electrodes. The asymmetric design broadens the working potential up to 1.7 V, leading to a high energy density of 33 Wh/kg and a high power density of 26 kW/kg. We believe that the CF/VAGN/FeOOH electrode holds great promise for applications in high-performance asymmetric supercapacitors.

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Publication details

The article was received on 26 Sep 2018, accepted on 28 Nov 2018 and first published on 29 Nov 2018


Article type: Paper
DOI: 10.1039/C8CE01639A
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Amorphous FeOOH nanorods and Co3O4 nanoflakes as binder-free electrodes for high-performance all-solid-state asymmetric supercapacitor

    Q. Liao and C. Wang, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE01639A

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