One-pot Hydrothermal Synthesis of RGO/FeS Composite on Fe Foil for High Performance Supercapacitors

A porous RGO/FeS composite was in-situ grown on Fe foil surface. This RGO/FeS was directly used as supercapacitor electrode, which exhibited excellent electrochemical performance: 900 mF cm−2 (300Fg−1) and 97.5% maximum capacity retention after 2000 cycles. [Display omitted] •RGO/FeS in-situ grown o...

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Veröffentlicht in:Electrochimica acta 2017-08, Vol.246, p.497-506
Hauptverfasser: Zhao, Chongjun, Shao, Xiaoxiao, Zhu, Zhaoqiang, Zhao, Chunhua, Qian, Xiuzhen
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container_start_page 497
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Shao, Xiaoxiao
Zhu, Zhaoqiang
Zhao, Chunhua
Qian, Xiuzhen
description A porous RGO/FeS composite was in-situ grown on Fe foil surface. This RGO/FeS was directly used as supercapacitor electrode, which exhibited excellent electrochemical performance: 900 mF cm−2 (300Fg−1) and 97.5% maximum capacity retention after 2000 cycles. [Display omitted] •RGO/FeS in-situ grown on Fe foil via facile one-pot hydrothermal method.•Fe foil served as the iron source of FeS, reductant of GO and current collector.•A porous structure with the interconnection of FeS nanosheets.•A bind-free supercapacitor electrode with excellent performance. RGO/FeS composites on Fe foil were successfully prepared via a facile one-pot hydrothermal method, in which Fe foil acted as Fe source of FeS, reductant of GO and subsequent current collector. As-prepared RGO/FeS was directly served as the electrode of supercapacitor which exhibited a high specific capacitance of 900 mF cm−2 (300Fg−1) and a superior cyclability of 97.5% maximum capacity retention after 2000 cycles. Furthermore, an asymmetric supercapacitor (ASC) was assembled using Ni(OH)2 as the positive electrode and RGO/FeS as the negative electrode. This ASC delivered a high power density of 20930.4Wkg−1 with an energy density of 11.63 Wh kg−1, or a high energy density of 27.91 Wh kg−1 at the power density of 2093.18Wkg−1, indicating RGO/FeS is a promising negative electrode of supercapacitor.
doi_str_mv 10.1016/j.electacta.2017.06.090
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This RGO/FeS was directly used as supercapacitor electrode, which exhibited excellent electrochemical performance: 900 mF cm−2 (300Fg−1) and 97.5% maximum capacity retention after 2000 cycles. [Display omitted] •RGO/FeS in-situ grown on Fe foil via facile one-pot hydrothermal method.•Fe foil served as the iron source of FeS, reductant of GO and current collector.•A porous structure with the interconnection of FeS nanosheets.•A bind-free supercapacitor electrode with excellent performance. RGO/FeS composites on Fe foil were successfully prepared via a facile one-pot hydrothermal method, in which Fe foil acted as Fe source of FeS, reductant of GO and subsequent current collector. As-prepared RGO/FeS was directly served as the electrode of supercapacitor which exhibited a high specific capacitance of 900 mF cm−2 (300Fg−1) and a superior cyclability of 97.5% maximum capacity retention after 2000 cycles. 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subjects Composite materials
Density
Electrodes
Energy
Fe foil
Flux density
Foils
Graphene oxide
Hydrothermal
RGO/FeS
Supercapacitor
Supercapacitors
title One-pot Hydrothermal Synthesis of RGO/FeS Composite on Fe Foil for High Performance Supercapacitors
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