Journal
ELECTROCHIMICA ACTA
Volume 123, Issue -, Pages 183-189Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.01.009
Keywords
Flower-like; Cobalt sulfide; Supercapacitor; Microwave
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Funding
- Natural Science Foundation of China [21177090, 21275104, 21175094]
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In this study, a novel facile and rapid method to prepare three-dimensional (3D) flower-like CoS hierarchitectures by microwave assisted heating has been developed. The 3D flower-like CoS architectures are constructed by two-dimensional nanopetals intertwined with each other and the formation mechanism are studied. The pseudo-capacitive properties of the CoS material are evaluated by cyclic voltammetry and galvanostatic charge-discharge tests in 6 M KOH solution. A specific capacitance of 586 F g(-1) is obtained at a charge-discharge current density of 1 A g(-1). The CoS nanostructure exhibits excellent cycling stability and it maintains 91% of its initial specific capacitance after 1000 cycles. It also exhibits excellent rate capability, improved energy density and power density. (C) 2014 Elsevier Ltd. All rights reserved.
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