期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 154, 期 2-3, 页码 131-133出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2010.04.025
关键词
Lithium; Battery; Electrolyte
资金
- U.S. Department of Energy Office of Vehicles Technologies
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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