《A study of vinylene carbonate and prop-1-ene-1,3 sultone electrolyte additives using polycrystalline Li[Ni0.6Mn0.2Co0.2]O2 in positive/positive symmetric cells》 was written by Liu, Yulong; Hamam, Ines; Dahn, J. R.. Recommanded Product: Vinylene carbonateThis research focused onvinylene carbonate lithium nickel manganese cobalt oxygen sym cell. The article conveys some information:
Vinylene carbonate (VC) and prop-1-ene-1,3 sultone (PES) have been reported to have beneficial effects on both neg. and pos. electrodes of Li-ion cells. To simplify evaluation of these two additives with Li[Ni0.6Mn0.2Co0.2]O2 (NMC622), pos./ pos. sym. cells were used to exclude the influence from any neg. electrode. The compatibility of electrolytes containing 2%VC or 2%PES with NMC622 in 1M LiPF6 EC:DEC (volume/volume 1:2) electrolyte was evaluated by multiple voltage hold periods at 55°C to accelerate the capacity fade. EIS spectra showed 2%PES is superior for impedance control compared to 2%VC. dV/dQ vs V fitting results showed that active mass loss is worse at high voltage than low voltage regardless of electrolyte used. Cross-sectional SEM images showed more microcracking of NMC622 particles at high voltage than at low voltage, which was more severe at the end of testing than at the beginning of testing. Sym. cell storage at 0 V (ca. 3.8 V vs Li/Li+) and 0°C showed a significant increase in cell impedance for cells stored after the end of testing and a moderate impedance increase for cells stored at the beginning of testing suggesting the accumulation of deleterious reaction products in the cells during testing. In addition to this study using Vinylene carbonate, there are many other studies that have used Vinylene carbonate(cas: 872-36-6Recommanded Product: Vinylene carbonate) was used in this study.
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.Recommanded Product: Vinylene carbonate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics