期刊
CERAMICS INTERNATIONAL
卷 40, 期 8, 页码 13381-13388出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2014.05.055
关键词
Nanocomposite; Manganese dioxide; Mesoporous carbon; Controlled synthesis; 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 (Chongqing University) [2013MS06]
- State Education Ministry and Fundamental Research Funds for the Central Universities (Chongqing University, PR China) [CDJZR12248801, CDJZR12135501, CDJAZ13130035]
Colloidal mesoporous carbon (MC) supported MnO2 nanocomposites have been synthesized via a facile and cost-effective strategy at room temperature. The structure and morphology of as-prepared nanocomposites are characterized by X-ray diffraction (XRD), Thermogravimetric analyzer (TGA), nitrogen adsorption, focused ion beam scanning electron microscopy (FIB/SEM) and high-resolution transmission electron microscopy (HRTEM). The as-obtained three-dimensional architecture can be well controlled by tailoring preparative parameters (e.g., the ratio of KMnO4 and MC) and applied as supercapacitor electrodes. Cycle voltammetric (CV) and galvanostatic charge-discharge (GC) measurements present MC-MnO2 composites exhibit the optimized pseudocapacitance performance (270.5 F g(-1)) with newfangled cycling stability, and ideal rate capability owning to rational design of the novel nanostructures. In principle, these findings exhibit potential in developing long cycling and quick-charge/slow-discharge supercapacitors for practical applications. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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