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Erschienen in: Journal of Materials Science: Materials in Electronics 15/2020

22.06.2020

Synthesis of nickel sulfide–graphene oxide composite microflower structures to enhance supercapacitor performance

verfasst von: Mengru Qi, Wenwu Zhu, Zhengdao Lu, Hanzhuo Zhang, Yihan Ling, Xuemei Ou

Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 15/2020

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Abstract

NixSy in various crystal phases (NiS, NiS2, and Ni3S4) was synthesized on thermally reduced graphene oxide (TRGO) by a one-step hydrothermal process. Microstructures and morphologies of as-prepared NixSy–TRGO composites were characterized. NixSy was formed as microflowers with average size of 1.1–2.3 µm, which grew homogeneously on the curved TRGO nanosheets. Electrochemical performance of NixSy–TRGO was revealed with high specific capacitance of 1602.2 F g−1 at 1 A g−1 and favorable cycling retention of 90.81% after 3000 cycles at 5 A g−1. An asymmetric supercapacitor device based on NixSy–TRGO||TRGO exhibited a superior energy density of 39.78 Wh kg−1 at the power density of 0.75 kW kg−1 with an cycling stability of 91.2% capacitance retention after 3000 cycles. Thus, the as-prepared NixSy–TRGO could be an advanced supercapacitor electrode material.

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Metadaten
Titel
Synthesis of nickel sulfide–graphene oxide composite microflower structures to enhance supercapacitor performance
verfasst von
Mengru Qi
Wenwu Zhu
Zhengdao Lu
Hanzhuo Zhang
Yihan Ling
Xuemei Ou
Publikationsdatum
22.06.2020
Verlag
Springer US
Erschienen in
Journal of Materials Science: Materials in Electronics / Ausgabe 15/2020
Print ISSN: 0957-4522
Elektronische ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-020-03804-x

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