Solvation and ion association studies of LiBF4-propylenecarbonate and LiBF4-propylenecarbonate-trimethyl phosphate solutions

Article Abstract:

Ion-associations and solvations of Li(super +) ions are studied in concentrated LiBF4 solutions in propylenecarbonate (PC) and also solutions containing trimethyl phosphate with measurement of conductivities, self-diffusion coefficients by field gradient NMR spectroscopy, and Raman spectra. An improvement of ion conductivity in solution is reported by the addition of trimethyl phosphate as a Lewis base.

Nuclear magnetic resonance spectroscopy, Ions

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XPS valence characterization of lithium salts as a tool to study electrode/electrolyte interfaces of Li-ion batteries

Article Abstract:

The X-ray photoelectron spectroscopy (XPS) characterization of LiP[F.sub.6], LiB[F.sub.4], LiTFSI and LiBETI salts are presented by recording their core peaks and valence spectra. The results obtained are used to characterize passivation layers formed at the surface of graphite negative electrodes taken from LiCo[O.sub.2]/graphite electrochemical cells by using either LiTFSI or LiBETI salt.

Primary Battery Manufacturing, Primary batteries, dry and wet, Lithium Dry Cell Batteries, Usage, Electrolytes, Lithium cells, Lithium batteries, Photoelectron spectroscopy, Chemical properties

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Conductivity and solvation of Li+ ions of LiPF6 in propylene carbonate solutions

Article Abstract:

Research into the ionic conductivity of lithium hexafluorophosphate (LiPF6) and the behaviour of solvated Li+ ion species in organic solvents is presented. The high solubility of LiPF6 in propylene carbonate and the high viscosity of the solution are considered.

Ionic mobility, Lithium, Lithium (Metal)

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