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

Wagner R, Brox S, Kasnatscheew J, Gallus DR, Amereller M, Cekic-Laskovic I, Winter M

Abstract

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 resultsindicate that already small amount of these additives is able to form a stable SEI and thus successfully preventexfoliation of the graphite. Moreover, the tested additives showed slight impact on the cathode performanceas well as on the safety characteristics.