Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 154, Issue 2-3, Pages 131-133Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2010.04.025
Keywords
Lithium; Battery; Electrolyte
Funding
- U.S. Department of Energy Office of Vehicles Technologies
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The solvation of LiPF6 by carbonate solvents (EC, DMC, and DEC) was investigated via C-13 NMR chemical shift and H-1 NMR diffusion coefficient experiments. The gradual addition of LiPF6 into a ternary solvent mixture results in a larger change in the chemical shift of EC than DMC or DEC suggesting that EC binds Li+ more strongly than DEC or DMC. The self diffusion coefficient of the carbonate solvents provides additional support for EC binding Li+ more strongly than DEC or DMC. Variable temperature NMR spectroscopic investigations support an increase in EC binding at low temperature and an enthalpic preference for the binding of EC to Li+. (C) 2010 Elsevier B.V. All rights reserved.
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