| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide: a nonaqueous electrolyte excellent particularly in high-temperature storage characteristics and cycle characteristics, in a nonaqueous electrolyte secondary battery; and a nonaqueous electrolyte secondary battery including the nonaqueous electrolyte. <P>SOLUTION: A nonaqueous electrolyte including an electrolyte and a non-aqueous solvent contains a compound having cations and anions in the molecule, and a content of the compound is 0.0001 mol or more and less than 0.1 mol per 1 kg of the electrolyte. A nonaqueous electrolyte including an electrolyte and a nonaqueous solvent contains a compound having cations and anions in the molecule, and further contains at least one compound selected from the group consisting of a cyclic carbonate compound having a carbon-carbon unsaturated bond, a cyclic carbonate compound having a fluorine atom, a monofluorophosphate and a difluorophosphate. <P>COPYRIGHT: (C)2013,JPO&INPIT |
