title: Characterization of modified SiC@SiO2 nanocables/MnO2 and their potential application as hybrid electrodes for supercapacitors.
abstract: In this research, we demonstrate a simple route for preparing SiC@SiO2 core-shell nanocables and furthermore obtain SiC@SiO2 nanocables/MnO2 as hybrid electrodes for supercapacitors using various modified methods. The modified procedure consists of mild modifications using sodium hydroxide as well as UV light irradiation and deposition of MnO2. The morphology and microstructural characteristics of the composites are investigated using XRD, XPS, FE-SEM with EDS and TEM. The results indicate that the surfaces of modified SiC@SiO2 nanocables are uniformly coated with a MnO2 thin layer. The electrochemical behaviors of the hybrid electrodes are systematically measured in a three-electrode system using cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. The resultant electrode presents a superb charge storage characteristic with a large specific capacitance of 276.3 F g(-1) at the current density of 0.2 A g(-1). Moreover, the hybrid electrode also displays a long cycle life with a good capacitance retention (∼92.0%) after 1000 CV cycles, exhibiting a promising potential for supercapacitors.
authors.affiliation: School of Chemistry and Biological Engineering, University of Science & Technology Beijing, Beijing 100083, China.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Material Science and Engineering, University of Science & Technology Beijing, Beijing 100083, China. cjh@ustb.edu.cn.
authors.forename: Junhong
authors.initials: J
authors.lastname: Chen
authors.affiliation: School of Chemistry and Biological Engineering, University of Science & Technology Beijing, Beijing 100083, China.
authors.forename: Huili
authors.initials: H
authors.lastname: Fan
authors.affiliation: State Key Laboratory of Advanced Metallurgy, University of Science &Technology Beijing, Beijing 100083, China. houxinmei@ustb.edu.cn.
authors.forename: Kuo-Chih
authors.initials: KC
authors.lastname: Chou
authors.affiliation: State Key Laboratory of Advanced Metallurgy, University of Science &Technology Beijing, Beijing 100083, China. houxinmei@ustb.edu.cn.
authors.forename: Xinmei
authors.initials: X
authors.lastname: Hou