Physical characteristics and rate performance of (CFx)n (0.33 < x < 0.66) in lithium batteries |
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| Affiliation: | 1. CALTECH-CNRS, Pasadena, CA 91125, USA;2. Quallion LLC, 12744 San Fernando Rd, Sylmar, CA 91342, USA;3. CNRS-LEPMI UMR 5631 BP75, 38402 St Martin d’Heres, France;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. Shanghai Institute of Space Power Sources, Shanghai 200245, China;2. Shanghai Engineering Center for Power and Energy Storage Systems, Shanghai 200245, China;3. BL14B1 Shanghai Synchrotron Radiation Facility, Shanghai 201204, China;1. Department of Physics and Astronomy, Hunter College of CUNY, New York, NY 10065, USA;2. Medtronic Energy and Component Center, Brooklyn Center, MN 55430, USA;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. 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: | Sub-fluorinated graphite fluorides (CFx)n compounds, 0.33 < x < 0.63 were prepared from natural graphite and characterized by TGA, SEM-EDX and XRD. Their cathode behavior in lithium batteries was investigated under different discharge rates and compared to commercial petroleum coke based (CF)n. At low discharge rate, the energy density increases with the fluorine content x. However, at higher rates, sub-fluorinated compounds performed better than commercial (CF)n. The result is discussed with relation to higher electrical conductivity of sub-fluorinated compounds. |
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