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NiS nanosheets with novel structure anchored on coal-based carbon fibers prepared by electrospinning for flexible supercapacitors

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Abstract

Elm seed-like nickel sulfide nanosheets grown on the surface of coal-based carbon fibers are reasonably constructed and prepared by a multistep transformation approach. The silica/coal-based carbon fibers are obtained via electrospinning a water/N,N-dimethylformamide two-phase solution of oxidized coal, polyvinyl alcohol and tetraethyl orthosilicate, followed by carbonization. The elm seed-like nickel silicate nanosheets formed by many small nickel silicate nanosheets are deposited on the surface of the coal-based carbon fibers, and then transformed into nickel sulfide with a similar morphology by chemical conversion. Benefiting from the large specific surface area and unique novel structure of the obtained sample, the obtained binder-free electrode exhibits a high specific capacitance of 635.1 F g−1 at 1 A g−1 and delivers a good capacitance retention of 96.4% over 5000 cycles, which are much higher than those of the reference sample without tetraethyl orthosilicate (298.5 F g−1 and 87.7%, respectively). This design idea offers a new strategy for the synthesis of elm seed-like nickel sulfide nanosheet/coal-based carbon fiber composites as flexible electrode materials.

Graphical abstract: NiS nanosheets with novel structure anchored on coal-based carbon fibers prepared by electrospinning for flexible supercapacitors

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Publication details

The article was received on 03 Oct 2019, accepted on 14 Nov 2019 and first published on 14 Nov 2019


Article type: Paper
DOI: 10.1039/C9CE01560D
CrystEngComm, 2020, Advance Article

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    NiS nanosheets with novel structure anchored on coal-based carbon fibers prepared by electrospinning for flexible supercapacitors

    F. Tong, X. Wu, W. Jia, J. Guo, Y. Pan, Y. Lv, D. Jia and X. Zhao, CrystEngComm, 2020, Advance Article , DOI: 10.1039/C9CE01560D

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