期刊
APPLIED SURFACE SCIENCE
卷 447, 期 -, 页码 165-172出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2018.03.236
关键词
Hybrid supercapacitor; Energy density; CNT; NiCo2S4; Core-shell
类别
资金
- National Nature Science Foundation of China [21503055]
- Hong Kong Scholars Programs [XJ2016046]
- China Postdoctoral Science Foundation [2015M571390]
- Natural Science Foundation of Heilongjiang Province of China [QC2015015]
- Heilongjiang Postdoctoral Fund [LBHZ14054, LBH-TZ0609]
A simple hydrothermal route is designed to decorate NiCo2S4 nanoparticles on the surface of N-doped carbon nanotubes to form a coaxial composite (NiCo2S4@NCNT). Inherited the high electrical conductivity from the NCNT and high capacitive performance of NiCo2S4, the optimized NiCo2S4@NCNT composite could significantly reduce the contact resistance and effectively increase the transfer rate of ion and electron and thus benefit for its electrochemical performance enhancement. When employed as a battery-type supercapacitor electrode, the NiCo2S4@NCNT composite exhibits a high capacitance up to 783.5 C g(-1) at 1 A g(-1) and as well as rate performance (74.6% retention with the current density increases from 1 to 50 A g(-1)). Coupled with activated carbon (AC) negative electrode, the as-assembled hydride supercapacitor delivers a maximum energy density of 49.75 Wh kg(-1) at a power density of 774.65Wkg(-1), as well as 88.9% capacitance retained after 3000 cycles at a current density of 10 A g(-1). These above results demonstrate the enormous potential of NiCo2S4@ NCNT in the development of hybrid supercapacitors. (C) 2018 Published by Elsevier B.V.
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