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Nanostructured mixed transition metal oxides for high performance asymmetric supercapacitors: Facile synthetic strategy |
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| Authors: | Sanaz Tajik Deepak P. Dubal Pedro Gomez-Romero Amir Yadegari Alimorad Rashidi Bahram Nasernejad Abdullah M. Asiri |
| Affiliation: | 1. Faculty of Chemical Engineering, Amirkabir University of Technology, Hafez Ave, P.O. Box 15875-4413, Tehran, Iran;2. Catalan Institute of Nanoscience and Nanotechnology (ICN2), and The Barcelona Institute of Science and Technology (CSIC-BIST), Campus UAB, Bellaterra, 08193 Barcelona, Spain;3. School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia;4. Department of Developmental Sciences, Marquette University School of Dentistry, Milwaukee, WI 53233, USA;5. Nanotechnology Research Center, Research Institute of Petroleum Industry (RIPI), P.O. Box 14665-137, Tehran, Iran;6. Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Saudi Arabia;7. Centre of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P. O. Box 80203, Jeddah 21589, Saudi Arabia |
| Abstract: | Exceptionally simple and cost-effective solid-state method is reported for the synthesis of different mixed transition metal oxides (MTMOs) including FeCo2O4, MnCo2O4 and ZnCo2O4 with unique nanostructures. The morphological analysis show that MTMOs possess distinct nanostructures such as tetragonal, spherical nanoparticles and hexagonal nanosheets. Furthermore, these MTMOs showed excellent supercapacitive properties with specific capacitances of 660–1263 F/g at current density of 2 A/g. Asymmetric capacitor was fabricated with FeCo2O4 as positive and activated carbon as negative electrode which exhibits a specific capacitance of 88 F/g with energy density of 24 Wh/kg (1.1 mWh/cm3) and cycle life (93%) over 5000 cycles. |
| Keywords: | Ternary metal oxides Asymmetric supercapacitor High energy density Specific capacitance |
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