Application In Synthesis of Vinylene carbonateIn 2020 ,《Studies of the SEI layers in Li(Ni0.5Mn0.3Co0.2)O2/rtificial graphite cells after formation and after cycling》 was published in Journal of the Electrochemical Society. The article was written by Keefe, A. S.; Weber, Rochelle; Hill, I. G.; Dahn, J. R.. The article contains the following contents:
Li(Ni0.5Mn0.3Co0.2)O2/artificial graphite cells containing different electrolyte additives were studied using electrochem. impedance spectroscopy (EIS) and XPS after formation and after long-term charge-discharge cycling. Pos. and neg. electrodes were examined sep. in sym. cells to study the solid electrolyte interphase (SEI) at Each electrode. EIS measurements were taken vs. temperature, and activation energies (Ea) related to Li+ transport through the SEI were calculated After cycling, Ea differed depending on electrolyte additive, electrode type, and cycling voltage limits. Charge transfer resistance was also compared after formation and cycling and did not always correlate with Ea trends, suggesting that multiple factors influence SEI properties. XPS was used to study the chem. composition and thickness of the SEI. Electrolyte additives affected the quantity of inorganic materials in the SEI, and more inorganic material appeared to correlate with lower Ea values. Cells containing Li difluorophosphate electrolyte additive had the best lifetime of the cells studied. These cells also showed the lowest SEI activation energy values, lowest charge transfer resistance, and most inorganic SEI composition after cycling. The results came from multiple reactions, including the reaction of Vinylene carbonate(cas: 872-36-6Application In Synthesis of Vinylene carbonate)
Vinylene carbonate(cas: 872-36-6) belongs to esters. Alkyl carbonates find applications as solvents for lithium ion battery electrolytes and the use of high quality battery grade electrolytes having extremely low water (<10 ppm) and acid (<10 ppm) contents are critical for achieving high electrochemical performance.Application In Synthesis of Vinylene carbonate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics