Vinyl sulfones as SEI-forming additives in propylene carbonate based electrolytes for lithium-ion batteries

The electrochemical performance of propylene carbonate (PC) based electrolytes with methyl vinyl sulfone (MVS) and ethyl vinyl sulfone (EVS) as film-forming additives on graphite electrode was studied. The results indicate that already small amount of these additives is able to form a stable SEI and thus successfully prevent exfoliation of the graphite. Moreover, the tested additives showed slight impact on the cathode performance as well as on the safety characteristics.