期刊
CHEMICAL ENGINEERING JOURNAL
卷 317, 期 -, 页码 873-881出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.02.130
关键词
Nickel cobalt sulfid; Reaction time; Flaky attached hollow-sphere; Energy storagey
资金
- Natural Science Foundation of Shanxi Province [2015JZ014]
In this work, the flaky attached hollow-sphere structure NiCo2S4 electrode materials have been synthesized via one-step hydrothermal method. The metallographic phase structures, morphologies and pore distribution are characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption-desorption. In view of the influence of reaction time, different compared tests and corresponding electrochemical performances (the measurements of CV, GCD, EIS, cycle life) are performed. As a result, the NCS-10 electrode shows an excellent specific capacitance (Csp) of 1366 F g(-1) at the current density of 1 A g(-1), high rate capability (51.25% even at 20 A g(-1)) and good cycle property (89.8% of the initial specific capacitance even after 2000 cycles). The NCS-10 electrode demonstrates great potential as a power source for electrochemical energy storage devices. (C) 2017 Elsevier B.V. All rights reserved.
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