| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery with battery characteristics improved. <P>SOLUTION: The battery is provided with a cathode 21 and an anode 22 together with electrolyte solution impregnated in a separator 23 fitted between the cathode 21 and the anode 22. A solvent of the electrolyte solution contains a sulfone compound having a sulfonyl fluoride type structure with a sulfonyl group and a fluorine group combined, and at least a kind out of linear carbonic acid ester having halogen and cyclic carbonic acid ester having halogen. As compared with the case in which neither of these is contained, or only either is contained, chemical stability of the electrolyte solution is improved, so that decomposition reaction of the electrolyte solution is restrained. <P>COPYRIGHT: (C)2009,JPO&INPIT |
