| abstract |
The invention relates to an electrolyte composition containing at least one compound of (I) wherein R 1 is selected from C 1 to C 10 alkyl, and R 2 is selected from O(C 1 to C 10 alkyl), OC(O)(C 1 to C 10 alkyl), OC(O)O(C 1 to C 10 alkyl), OS(O)2(C 1 to C 10 alkyl) and S(O) 2 O(C 1 to C 10 alkyl), wherein C 1 to C 10 alkyl may be substituted by one or more F and wherein one or more CH 2 - groups of C 1 to C 10 alkyl which are not bound directly to O may be replaced by O. |