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Issue 13, 2019
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Designing graphene-wrapped NiCo2Se4 microspheres with petal-like FeS2 toward flexible asymmetric all-solid-state supercapacitors

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Abstract

Herein, we proposed a desirable strategy for the synthesis of graphene-wrapped NiCo2Se4 microspheres (positive electrode) and petal-like iron disulfide (FeS2) (negative electrode) on nickel foam substrates. The positive electrode represents a substantial specific capacitance of 2112.30 F g−1 and excellent durability (6.8% loss after 5000 cycles). Furthermore, the negative electrode reflects good electrochemical performance with a specific capacitance of 321.30 F g−1 and a satisfactory rate capability of 47% capacitance retention. Considering the notable properties of the electrodes, a flexible asymmetric all-solid-state device based on graphene-wrapped NiCo2Se4 microspheres (positive electrode) and petal-like iron disulfide (negative electrode) was assembled. Our flexible device exhibits the high specific capacitance of 221.30 F g−1, the significant energy density of 78.68 W h kg−1 and excellent flexibility.

Graphical abstract: Designing graphene-wrapped NiCo2Se4 microspheres with petal-like FeS2 toward flexible asymmetric all-solid-state supercapacitors

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Publication details

The article was received on 02 Jan 2019, accepted on 22 Feb 2019 and first published on 11 Mar 2019


Article type: Paper
DOI: 10.1039/C9DT00009G
Dalton Trans., 2019,48, 4274-4282

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    Designing graphene-wrapped NiCo2Se4 microspheres with petal-like FeS2 toward flexible asymmetric all-solid-state supercapacitors

    A. Mohammadi Zardkhoshoui, S. S. Hosseiny Davarani and A. A. Asgharinezhad, Dalton Trans., 2019, 48, 4274
    DOI: 10.1039/C9DT00009G

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