Delving into the Properties and Solution Structure of Nitrile-Lithium Difluoro(oxalato)borate (LiDFOB) Electrolytes for Li-ion Batteries

摘要

The phase diagram of acetonitrile-LiDFOB mixtures was determined. Raman spectroscopic analysis of the DFOB~- anion vibrational bands indicates that a diverse range of solvates are present in solution. As demonstrated here, an in-depth analysis of (AN)_n-LiDFOB electrolyte mixtures through the combination of the phase diagram with Raman spectroscopic characterization (and known crystalline solvate structures) enables the identification of the solvate species present. This information greatly aids in understanding the link between solution structure and electrolyte properties.