Issue 9, 2020

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

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 gāˆ’1 at 1 A gāˆ’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 gāˆ’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

Supplementary files

Article information

Article type
Paper
Submitted
03 oct. 2019
Accepted
14 nov. 2019
First published
14 nov. 2019

CrystEngComm, 2020,22, 1625-1632

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, 22, 1625 DOI: 10.1039/C9CE01560D

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