Lithium Methyl Carbonate as a Reaction Product of Metallic Lithium and Dimethyl Carbonate

Investigation and application of lithium difluoro(oxalate)borate (LiDFOB) as additive to improve the thermal stability of electrolyte for lithium-ion batteries

“…5B) by FTIR-ATR spectra provides additional insight into the differences of electrodes surface after 200 cycles at 60 • C with and without LiDFOB added. The IR spectra of the anodes extracted from cells containing different electrolytes are similar and are dominated by the absorptions characteristics of polycarbonate (1730 cm −1 ), Li 2 CO 3 (∼1500 cm −1 ), Li x PO y F z (1039 cm −1 ), Li x PF y (843 cm −1 ) besides the binder peaks [16,36,37]. In addition, the electrodes extracted from the cells with LiDFOB added electrolytes contain additional peaks at 1071 and 1630 cm −1 , characteristics of B-O species and oxalate.…”

The formation and stability of the solid electrolyte interface on the graphite anode

“…The surface film passivation, which generally follows a classical diffusion-limited process [78], is also influenced by electrolyte additives [2,6,16,80] and the potential window [11]. Most electrolyte solvents of high purity have a decomposition potential of 4.6e4.9 V vs. Li/Li þ , although for lithium ion batteries a potential greater than 5 V is desired [11].…”

Identification of Diethyl 2,5-Dioxahexane Dicarboxylate and Polyethylene Carbonate as Decomposition Products of Ethylene Carbonate Based Electrolytes by Fourier Transform Infrared Spectroscopy

“…Several theoretical and experimental studies have been performed to determine the effect of Li + solvation on IR vibration spectra of electrolytes solvent and electrolyte decomposition. 4,[14][15][16][17] . Even though neither DEDOHC nor poly-EC is lithium compounds, lithium salt can be dissolved in these compounds and therefore it is essential that FTIR reference spectra include the solvation contribution.…”