Hu Yan; Zhang Jie; Wang Di; Sun Jiangbo; Zhang Li; Liu Yanjie; Gao Shiqiu; Cui Yanbin
Source Publicationparticuology
AbstractNickel cobalt sulfides (NiCo2S4) have attracted considerable attention as electrode materials for super capacitors. Herein, a sea-urchin-like NiCo2S4 material was synthesized through a one-step solvothermal process. Polyethylene glycol (PEG) 200 and thiourea were used as a shape-control agent and sulfur source for in-situ sulfuration, respectively. The urchin-like NiCo2S4 was characterized by X-ray powder diffraction, scanning electron microscopy, Brunauer-Emmett-Teller surface area, and electrochemical measurements. The resulting NiCo2S4 with ion diffusion-favored structure demonstrated remarkable electrochemical characteristics for supercapacitor with a high specific capacitance (1334 F/g at 0.5 A/g) and superior rate capability (78.1% of the original capacity from 0.5 to 20 A/g) in 6 M KOH aqueous solution. Furthermore, an asymmetric supercapacitor was assembled using NiCo2S4 as a positive electrode and activated carbon (AC) as a negative electrode. A NiCo2S4//AC device exhibited a high energy density of 37.32 Wh/kg at a power density of 317.8 W/kg with capacity retention of 91.9% and up to 2000 charge/discharge cycles at 3 A/g. The results demonstrate that the sea-urchin-like NiCo2S4 has potential applications in supercapacitors. (C) 2018 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
Funding Project[Fund of State Key Laboratory of Multiphase Complex Systems] ; [Center for Mesoscience, Institute of Process Engineering, Chinese Academy of Sciences]
Document Type期刊论文
First Author Affilication中国科学院过程工程研究所
Recommended Citation
GB/T 7714
Hu Yan,Zhang Jie,Wang Di,et al. urchinlikenico2s4structuressynthesizedthroughaonestepsolvothermalprocessforhighperformancesupercapacitors[J]. particuology,2019,45:66.
APA Hu Yan.,Zhang Jie.,Wang Di.,Sun Jiangbo.,Zhang Li.,...&Cui Yanbin.(2019).urchinlikenico2s4structuressynthesizedthroughaonestepsolvothermalprocessforhighperformancesupercapacitors.particuology,45,66.
MLA Hu Yan,et al."urchinlikenico2s4structuressynthesizedthroughaonestepsolvothermalprocessforhighperformancesupercapacitors".particuology 45(2019):66.
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