Ultrafast Kerr Spectroscopy Reveals Bulk-Like Solvent Dynamics in Concentrated LiTFSI-Acetonitrile Electrolytes.

ABSTRACT: Electrolyte solutions are vital to energy storage devices, significantly influencing their capacity, safety, and cost efficiency. Lithium salts based on multidentate anions have shown remarkable potential in energy storage, particularly when dissolved in acetonitrile. These solutions exhibit exceptionally high ionic conductivities, even for concentrations above the standard 1 mol L^-1 solutions. To directly probe bulk solvent and solvation shell dynamics in lithium salt solutions, the ultrafast optical Kerr effect (OKE) method is utilized. We investigate the microscopic dynamics of LiTFSI (lithium bis (trifluoromethanesulfonyl) imide) solutions at various concentrations in acetonitrile. The measured data, combined with a global analysis method, reveal that the solvent remains hig

SUBMITTER: Shah Y 

PROVIDER: S-EPMC12807504 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature