An investigation of the salt dissociation effects on solid electrolyte interface (SEI) formation using linear carbonate-based electrolytes in lithium ion batteries |
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| Affiliation: | 1. Material and Chemical Research Laboratories, Industrial Technology Research Institute, Chutung, Hsinchu, Taiwan;2. Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan;1. Department of Automotive Engineering, Sate Key Laboratory of Automotive Safety and Energy, Tsinghua University, 100084 Beijing, China;2. Hawaii Natural Energy Institute, School of Ocean and Earth Science and Technology, University of Hawai''i at Manoa, Honolulu, HI 96822, USA;3. RWTH Aachen Univ, 52062 Aachen, Germany;1. Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;2. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;3. Honda R&D Co., Ltd. Wako-shi, Saitama 351-0193, Japan;4. Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;5. Department of Materials Science and Engineering and SUNCAT Center, Stanford University, Stanford, CA 94305, USA;1. Dept. of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia, B3H3J5, Canada;2. Dept. of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H4R2, Canada;1. Department of Chemical Engineering, University of Waterloo 200 University Avenue West, Waterloo, ON, Canada N2L 3G1;2. Department of Mechanical Engineering, University of Akron Akron, OH 44325-3903, United States;3. Department of Mechanical and Mechatronics Engineering, University of Waterloo 200 University Avenue West, Waterloo, ON, Canada N2L 3G1 |
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| Abstract: | Lithium salts possess dissociating properties that are useful for passivation layer formation. In this study, these properties are investigated in the context of three kinds of linear carbonate electrolytes using several techniques, such as physical properties, AC impedance, electrochemical quartz crystal microbalance (EQCM), and nuclear magnetic resonance (NMR). The lithium salts are completely dissociated to the lithium ions by the unsymmetrical linear carbonate structure; therefore, the transference number and diffusion coefficient of the cations show that the lithium ions are important and dominate the ionic transfer and the passivation layer properties that are important and relate to battery performance. These data suggest that battery performance is influenced by ionic transfer properties, lithium salt and electrolyte structure. |
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