Nanosized Fe3O4-modified activated carbon for supercapacitor electrodes |
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Authors: | Ping He Ke Yang Wei Wang Faqin Dong Licheng Du Hongtao Liu |
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Affiliation: | 19765. Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, P. R. China 29765. College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, Hunan, P. R. China
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Abstract: | Nanosized Fe3O4-modified activated carbon composites for supercapacitor electrodes have been investigated. Structural and morphological characterizations of activated materials are carried out using X-ray diffraction and scanning electron microscopy, respectively. The electrochemical performances of the composite electrodes are evaluated by cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopy. The experimental results show that the specific capacitances of the 10 wt % Fe3O4-modified activated carbon composite electrode (154.3 F g?1) is highly improved compared with that of Fe3O4 (78.5 F g?1) and AC (79.2 F g?1) at the current density of 5 mA cm?2, respectively. The charge/discharge tests show that it could retain 79.6% of its initial capacitance over 1000 cycles, suggesting its potential application for the fabrication of high-quality supercapacitors. |
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