All-solid-state flexible asymmetric supercapacitors with high energy and power densities based on NiCo2S4@MnS and active carbon

Zhiguo Zhang; Xiao Huang; Huan Li; Hongxia Wang; Yingyuan Zhao; Tingli Ma

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All-solid-state flexible asymmetric supercapacitors with high energy and power densities based on NiCo2S4@MnS and active carbon

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Electrode material based on a novel core-shell structure consisting of NiCo2S4 (NCS) solid fiber core and MnS (MS) sheet shell (NCS@MS) in situ grown on carbon cloth (CC) has been successfully prepared by a simple sulfurization-assisted hydrothermal method for high performance supercapacitor.The synthesized NiCo2S4@MnS/CC electrode shows high capacitance of 1908.3 F g-1 at a current density of 0.5 A g-1 which is higher than those of NiCo2S4 and MnS at the same current density.A flexible all-solid-state asymmetric supercapacitor (ASC) is constructed by using NiCo2S4@MnS/CC as positive electrode,active carbon/CC as negative electrode and KOH/poly (vinyl alcohol) (PVA) as electrolyte.The optimized ASC shows a maximum energy density of 23.3 Wh kg-1 at 1 A g-1,a maximum power density of about 7.5 kw kg-1 at 10 A g-1 and remarkable cycling stability.After 9000 cycles,the ASC still exhibited 67.8％ retention rate and largely unchanged charge/discharge curves.The excellent electrochemical properties are resulted from the novel core-shell structure of the NiCo2S4@MnS/CC electrode,which possesses both high surface area for Faraday redox reaction and superior kinetics of charge transport.The NiCo2S4@MnS/CC electrode shows a promising potential for energy storage applications in the future.

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《天然气化学（英文版）》 |2017年第6期|1260-1266|共7页
作者
Zhiguo Zhang; Xiao Huang; Huan Li; Hongxia Wang; Yingyuan Zhao; Tingli Ma;
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Department of Life Science and System Engineering, Kyushu Institute of Technology, Kitakyushu 808-0134, Japan;

Department of Life Science and System Engineering, Kyushu Institute of Technology, Kitakyushu 808-0134, Japan;

Department of Life Science and System Engineering, Kyushu Institute of Technology, Kitakyushu 808-0134, Japan;

School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4001, Australia;

School of Petroleum and Chemical Engineering, Dalian University of Technology, Dalian 124221, Liaoning, China;

Department of Life Science and System Engineering, Kyushu Institute of Technology, Kitakyushu 808-0134, Japan;

School of Petroleum and Chemical Engineering, Dalian University of Technology, Dalian 124221, Liaoning, China;

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All-solid-state flexible asymmetric supercapacitors with high energy and power densities based on NiCo2S4@MnS and active carbon

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