| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a nonaqueous electrolyte secondary battery capable of suppressing gas generation at charging storage, and capable of improving charge and discharge cycle characteristics in the nonaqueous electrolyte secondary battery using silicon as a negative electrode active material, and containing carbon dioxide in the nonaqueous electrolyte. <P>SOLUTION: In the nonaqueous electrolyte secondary battery provided with the negative electrode containing silicon as the negative electrode active material, the positive electrode, a nonaqueous electrolyte containing an electrolyte salt and a solvent, the nonaqueous electrolyte contains carbon dioxide, LiBF<SB>4</SB>, and the electrolyte salt in which consumption caused by charge and discharge cycles is relatively less than that of LiBF<SB>4</SB>as the electrolyte salt. <P>COPYRIGHT: (C)2007,JPO&INPIT |
