| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolytic secondary battery having a negative electrode containing a binder and a negative electrode active material made of a granular silicon and/or a silicon alloy, which secondary battery offers superior charge/discharge cycle characteristics even under a high-temperature environment. <P>SOLUTION: The nonaqueous electrolytic secondary battery includes a positive electrode 1, the negative electrode 2, a separator 3, and a nonaqueous electrolyte. The negative electrode containing the binder and the negative electrode active material made of the granular silicon and/or the silicon alloy is used as the negative electrode 2. The nonaqueous electrolyte contains a fluorinated cyclic carbonate having a fluorine group and an alkyl group. When the nonaqueous electrolytic secondary battery is in a charged state, a negative electrode use rate (%) represented by (A/B)×100 is determined to be 45% or less, where Li occlusion per area by the negative electrode 2 is A and a theoretical maximum Li occlusion per area by the negative electrode 2 is B. <P>COPYRIGHT: (C)2010,JPO&INPIT |
