Co1?xFe2+xO4 (x = 0.1, 0.2) anode materials for rechargeable lithium-ion batteries |
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| Institution: | 1. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;2. State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Center for Computational Science & Engineering and Center for Quantum Information Technology, Peking University, Beijing 100871, China;1. Department of Physics and Astronomy, Iowa State University, Ames, IA 50011 USA;2. Department of Applied Physics, Chalmers, SE-41296 Göteborg, Sweden;3. Dept. of Physics, Penn State University, University Park, PA 16802, USA;4. SLAC National Accelerator Laboratory, Stanford University, CA 94309, USA;1. Institute of Physics, PAS, 02-668 Warsaw, Al. Lotników 32/46, Poland;2. Donetsk Institute for Physics and Engineering Named After O.O. Galkin, NАSU, 83114 Donetsk, R. Luxembourg Str. 72, Ukraine;3. Ioffe Physico-Technical Institute RAS, 194021 St. Petersburg, Russia;1. School of Electrical Engineering and Computer Science, Kyungpook National University, Daegu 702-701, Republic of Korea;2. Department of Electronic Engineering, Uiduk University, Gyeongju 780-713, Republic of Korea;1. College of Civil Engineering, Fujian University of Technology, Fuzhou 350108, PR China;2. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, PR China;1. Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska cesta 9, 841 04 Bratislava, Slovak Republic;2. Slovak University of Technology, Institute of Microelectronics and Photonics, Ilkovicova 3, 812 19 Bratislava, Slovak Republic |
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| Abstract: | A cobalt-poor or iron rich bicomponent mixture of Co0.9Fe2.1O4/Fe2O3 and Co0.8Fe2.2O4/Fe2O3 anode materials have been successfully prepared using simple, cost-effective, and scalable urea-assisted auto-combustion synthesis. The threshold limit of lower cobalt stoichiometry in CoFe2O4 that leads to impressive electrochemical performance was identified. The electrochemical performance shows that the Co0.9Fe2.1O4/Fe2O3 electrode exhibits high capacity and rate capability in comparison to a Co0.8Fe2.2O4/Fe2O3 electrode, and the obtained data is comparable with that reported for cobalt-rich CoFe2O4. The better rate performance of the Co0.9Fe2.1O4/Fe2O3 electrode is ascribed to its unique stoichiometry, which intimately prefers the combination of Fe2O3 with Co1?xFe2+xO4 and the high electrical conductivity. Further, the high reversible capacity in Co0.9Fe2.1O4/Fe2O3 and Co0.8Fe2.2O4/Fe2O3 electrodes is most likely attributed to the synergistic electrochemical activity of both the nanostructured materials (Co1?xFe2+xO4 and Fe2O3), reaching beyond the well-established mechanisms of charge storage in these two phases. |
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| Keywords: | Anode Rate capability Lithium-ion battery |
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