《Operando investigation of the solid electrolyte interphase mechanical and transport properties formed from vinylene carbonate and fluoroethylene carbonate》 was written by Kitz, Paul G.; Lacey, Matthew J.; Novak, Petr; Berg, Erik J.. Reference of Vinylene carbonate And the article was included in Journal of Power Sources in 2020. The article conveys some information:
The electrolyte additives vinylene carbonate (VC) and fluoroethylene carbonate (FEC) are well known for increasing the lifetime of a Li-ion battery cell by supporting the formation of an effective solid electrolyte interphase (SEI) at the anode. In this study combined simultaneous electrochem. impedance spectroscopy (EIS) and operando electrochem. quartz crystal microbalance with dissipation monitoring (EQCM-D) are employed together with in situ gas anal. (OEMS) to study the influence of VC and FEC on the passivation process and the interphase properties at carbon-based anodes. In small quantities both additives reduce the initial interphase mass loading by 30-50%, but only VC also effectively prevents continuous side reactions and improves anode passivation significantly. VC and FEC are both reduced at potentials above 1 V vs. Li+/Li in the first cycle and change the SEI composition which causes an increase of the SEI shear storage modulus by over one order of magnitude in both cases. As a consequence, the ion diffusion coefficient and conductivity in the interphase is also significantly affected. While small quantities of VC in the initial electrolyte increase the SEI conductivity, FEC decomposition products hinder charge transport through the SEI and thus increase overall anode impedance significantly.Vinylene carbonate(cas: 872-36-6Reference of 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.Reference of Vinylene carbonate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics