| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-energy-density nonaqueous electrolyte secondary battery having high charge-discharge efficiency, and excellent in a capacity maintenance characteristic, a battery characteristic in a broad temperature range, and safety; and to provide an electrolyte used for it. <P>SOLUTION: In this nonaqueous electrolyte prepared by dissolving a lithium salt in a nonaqueous solvent, the nonaqueous solvent contains an aromatic compound expressed by formula I. R<SP>1</SP>and R<SP>2</SP>each independently form an alkyl group that may have a substituted group, or R<SP>1</SP>and R<SP>2</SP>form a hydrocarbon ring that may have a substituted group by being bonded to each other. The ring A may have a substituted group; and at least one of carbon atoms adjacent to a carbon atom bonded to R<SP>1</SP>, R<SP>2</SP>CH- has a substituted group. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
