Carbonate compounds, non-aqueous electrolytic solutions and batteries comprising non-aqueous electrolytic solutions

A carbonate compound represented by the general formula (I)

• R.sup.1 CH.sub.2 --O--CO--O--CH.sub.2 R.sup.2 (I)
• wherein R.sup.1 represents a hydrogen atom, an unsubstituted C.sub.1 to C.sub.4 alkyl group or C.sub.1 to C.sub.3 alkyl group substituted with one or more halogen atoms, and R.sup.2 represents an unsubstituted C.sub.4 to C.sub.7 alkyl group having no hydrogen atom at the .alpha.-position thereof or a C.sub.1 to C.sub.3 alkyl group substituted with one or more halogen atoms and having no hydrogen atom at the .alpha.-position thereof with the proviso that R.sup.1 is not identical to R.sup.2.

A carbonate compound represented by the general formula (I)

• R.sup.1 CH.sub.2 --O--CO--O--CH.sub.2 R.sup.2 (I)
• wherein R.sup.1 is selected from the group consisting of --CH.sub.3 and --CF.sub.3, and R.sup.2 is selected from the group consisting of --C(CH.sub.3).sub.3, --CF.sub.3, --CF.sub.2 CF.sub.3 and --CF.sub.2 CF.sub.2 H.

A carbonate compound which is methyl 2,2,3,3,3-pentafluoropropyl carbonate.

A carbonate compound which is methyl 2,2,3,3-tetrafluoropropyl carbonate.

The carbonate compound represented by the general formula (I)

• R.sup.1 CH.sub.2 --O--CO--O--CH.sub.2 R.sup.2 (I)
• wherein R.sup.1 represents a hydrogen atom, a C.sub.1 to C.sub.4 alkyl group and R.sup.2 represents an unsubstituted C.sub.4 to C.sub.7 alkyl group having no hydrogen atom at the .alpha.-position thereof with the proviso that R.sup.1 is not identical to R.sup.2.