Fig. 9: Raman spectroscopy of different LiTFSI concentrations dissolved in THF.
From: The Effect of Applied Potential on the Li-mediated Nitrogen Reduction Reaction Performance
a Raman shift of the S-N-S bending vibration in crystalline LiTFSI (746.8 cm-1) and TFSI- dissolved in THF between 0.5–2.5 M. The Raman peaks were deconvoluted into a SSIP peak (740.5 cm-1) and CIP peak (745.5 cm-1) in OriginPro 10. b Percentage between the SSIP and CIP coordination modes with the LiTFSI salt concentration. c Schematic of the SSIP and CIP solvation environment of the Li+ - THF - TFSI- system based on ref. 58.
