Fluorinated carbon nanofibres for high energy and high power densities primary lithium batteries |
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| Affiliation: | 1. CALTECH-CNRS, International Laboratory on Materials for Electrochemical Energetics, Pasadena, CA 91125, USA;2. Laboratoire des Matériaux Inorganiques, UMR CNRS 6002-Université Blaise Pascal, 24 av. des Landais, 63177 Aubière Cedex, France;3. Matière Condensée et Résonance Magnétique, Université Libre de Bruxelles, CP 232, Boulevard du Triomphe, B-1050 Bruxelles, Belgium;1. The Institute of Problems of Chemical Physics of the Russian Academy of Sciences, Academician Semenov Avenue 1, Chernogolovka, Moscow, 142432, Russian Federation;2. Ltd. Regional Consulting and Technical Center of autonomous Power sources “Firm Alfa-plus”, B.Semenovskaya St. 42 (Building 1, Room VI), Moscow, Russian Federation;1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, PR China;2. Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China;1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, PR China;2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, PR China;3. Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin 300072, PR China;4. Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China;1. Department of Physics & Astronomy, University of Louisville, Louisville, KY 40292, USA;2. Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA;3. NanoHoldings LLC., Rowayton, CT 06853, USA;4. Department of English, University of Louisville, Louisville, KY 40292, USA;5. Advanced Research Center, Saga University, 1341 Yoga-Machi, Saga 840-0047, Japan;1. Université Clermont Auvergne, SIGMA Clermont, CNRS, ICCF, 24, avenue Blaise Pascal, 63178, Aubière, France;2. SAFT, Direction de la recherche, 111-113 Bd A. Daney, F-33074, Bordeaux, France;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, PR China;2. Department of New Energy, Tianjin Institute of Power Sources, Tianjin 300384, PR China |
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| Abstract: | The electrochemical performances of fluorinated carbon nanofibres have been tested for a use as cathode material in primary lithium battery using LiBF4 PC:DME 1M as electrolyte. For a very narrow fluorination range (420–450 °C), the fluorine content in the carbon nanofibres increases up to CF0.78 and so do both the energy and the power densities. A maximum of 8057 W kg−1 power density has been reached. Moreover, a current density of 6C can be used for such fluorinated carbon nanofibres. Such high electrochemical values can be correlated to the amount of unfluorinated carbon located in the core of the carbon nanofibres. Owing to solid state 13C NMR which can accurately evaluated this fraction, a minimum of 10% of unfluorinated carbon nanofibre is necessary in order to insure a good conducting behaviour. |
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