期刊
ELECTROCHIMICA ACTA
卷 263, 期 -, 页码 409-416出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.01.072
关键词
Molybdenum disulfide; Tungsten trioxide; Array; Heterojunction; Supercapacitor
资金
- National Nature Science Foundation of China [51472156, 51672170, 51604202, 51602189]
- Shanghai Excellent Technology Leader Program [17XD1424700]
- Science and technology project of Guangdong Province [2013B090600025]
- State Key Laboratory of Refractories and Metallurgy, China [2016QN09]
We first report a composite of molybdenum disulfide (MoS2) nanoflake arrays (MNFs) and tungsten trioxide (WO3) nanorod arrays (WNRs) directly grown on a copper (Cu) substrate. This composite is characterized in detail by scanning and transmission electron microscopes (SEM/TEM), X-ray diffraction (XRD), Raman and X-ray photoelectron spectroscopy (XPS). All of the evidences indicate that the obtained composite is a heterojunction. The supercapacitive properties of MNFs-WNRs composite heterojunction are measured systematically by using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. The heterojunction exhibits a high specific capacitance of 522 F g(-1) at 0.5 A g(-1), a high capacitance retention (95%) after 5000 cycles and a low charge transfer resistance (1.0 Omega). And this kind of heterojunction has advantages of both MoS2 and WO3, which can be a better candidate for supercapacitive electrode material. (c) 2018 Elsevier Ltd. All rights reserved.
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