Article history: In this work, NiO@MnO core/shell nanocomposites were fabricated by a two-step method. The mor- Received 15 June 2015 phology and structure of the nanocomposites were characterized by scanning electron microscopy, Received in revised form 12 October 2015 transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction analysis and Accepted 26 October 2015 thermal gravity analysis. In addition, the supercapacitive performances were examined by cyclic voltam- Available online 31 October 2015 mogram (CV), galvanostatic charge–discharge and electrochemical impedance spectroscopy (EIS). The −1 electrochemical results indicate that the composite exhibits a speciﬁc capacitance of 266.7 F g at Keywords: −1 −1 0.5 A g and excellent cycling stability (81.7% retention after 2000 cycles at 1 A g ). Therefore, this wok NiO tube offers meaningful reference for supercpacitor applications in the future. MnO nanosheets © 2015 Elsevier B.V. All rights reserved. Supercapacitor Nanocomposites −1 1. Introduction including high theoretical speciﬁc capacitance (1370 F g ), natural abundance, low cost, environmental friendly and rich redox activity As a kind of energy storage device, supercapacitors (SCs) . Unfortunately, the practical applications of MnO are limited have its unique properties, such as high power density, fast due to its weak rate capability and
Applied Surface Science – Elsevier
Published: Jan 1, 2016
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