期刊
MATERIALS LETTERS
卷 112, 期 -, 页码 203-206出版社
ELSEVIER
DOI: 10.1016/j.matlet.2013.09.032
关键词
Nanocomposite; Energy storage and conversion; Microstructure; Thin film; Supercapacitor
资金
- National Natural Science Foundation of China [51104194]
- Doctoral Fund of Ministry of Education of China [20110191120014]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars [43]
- National Key laboratory of Fundamental Science of Micro/Nano-device and System Technology [2013MS06]
- State Education Ministry and Fundamental Research Funds for the Central Universities (Chongqing University, PR China) [CDJZR12248801, CDJZR12135501, CDJZR13130035]
We developed a one-step hydrothermal approach to fabricate hierarchical MnO2 nanosheets on flowerlike CuO nanostructures without any surfactant. With this method, the ultrathin MnO2 nanosheets conformably and uniformly grew around every nanopetal of flower-like CuO. Furthermore, the electrochemical properties of the MnO2/CuO nanocomposite electrodes were elucidated by cyclic voltammograms, galvanostatic charge/discharge tests and electrochemical impedance spectroscopy in 1 M Na2SO4 electrolyte. The electrochemical results demonstrated that this unique MnO2/CuO nanostructure exhibited a specific capacitance of 167.2 F g(-1) and excellent cycling stability (88.6% retention after 5000 cycles). Indeed, these remarkable findings will enable low-cost MnO2/CuO nanocomposite attractive for high-performance supercapacitors. (C) 2013 Elsevier B.V. All rights reserved.
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