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Title: Solvate Structures and Computational/Spectroscopic Characterization of LiBF 4 Electrolytes

Crystal structures have been determined for both LiBF 4 and HBF 4 solvates—(acetonitrile) 2:LiBF 4, (ethylene glycol diethyl ether) 1:LiBF 4, (diethylene glycol diethyl ether)1:LiBF 4, (tetrahydrofuran) 1:LiBF4, (methyl methoxyacetate) 1:LiBF 4, (suc-cinonitrile) 1:LiBF 4, (N,N,N',N",N"-pentamethyldiethylenetriamine)1:HBF 4, (N,N,N',N'-tetramethylethylenediamine) 3/2:HBF 4 and (phenanthroline) 2:HBF 4. These, as well as other known LiBF 4 solvate structures, have been characterized by Raman vibrational spectroscopy to unambiguously assign the anion Raman band positions to specific forms of BF 4-...Li + cation coordination. In addition, complementary DFT calculations of BF 4-...Li + cation complexes have provided additional insight into the challenges associated with accurately interpreting the anion interactions from experimental Raman spectra. This information provides a crucial tool for the characterization of the ionic association interactions within electrolytes.
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Journal Article
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Journal Name: Journal of Physical Chemistry C, 118(32):18377-18386
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
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Country of Publication:
United States
coordination; crystal structure; ionic association; lithium; Raman