Patent ID: 8785057

Claim:
An electrolyte solution for low temperature capacitors or lithium batteries comprising a solvent system which is comprised of 35-100% by weight in total of at least one symmetrical or asymmetrical carbonate of the general formula (I): RO(C═O)OR 1 (I) wherein R is selected from the group consisting of methyl, ethyl, isopropyl, propyl, CH 3 OCH 2 CH 2 —, CH 3 OCH 2 CH 2 OCH 2 CH 2 —, CH 3 OCH 2 CH 2 OCH 2 CH 2 OCH 2 CH 2 —, R″OCH 2 CH 2 — and R″—O—(CH 2 ) n —, n is 2, 3 or 4, R 1 is selected from the group consisting of CH 3 OCH 2 CH 2 —, CH 3 OCH 2 CH 2 OCH 2 CH 2 —, CH 3 OCH 2 CH 2 OCH 2 CH 2 OCH 2 CH 2 —, CH 3 CH 2 OCH 2 CH 2 — and R″—O—CH 2 CH 2 —, and R″ is methyl, ethyl, propyl or isopropyl, and up to 65% by weight in total of at least one solvent which is different from the symmetrical or asymmetrical carbonate of general formula (I), said electrolyte solution additionally comprising at least one conductive salt and having a liquidus range of about −65° C. to about 171° C.