| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery having more superior cycle characteristics, in which even in a nonaqueous electrolyte secondary battery where charging voltage is set at 4.25 V or more, generation of unnecessary gas is suppressed at respective charging voltages and unnecessary operation of a safety valve is suppressed. <P>SOLUTION: The nonaqueous electrolyte secondary battery is equipped with a cathode, an anode, and the nonaqueous electrolyte in which an open-circuit voltage at a fully charged state per pair of cathode and anode is 4.25 to 6.00 V, and at least one kind selected out of specific sulfonic acid anhydrides is contained in the nonaqueous electrolytic solution of the nonaqueous electrolyte secondary battery. <P>COPYRIGHT: (C)2010,JPO&INPIT |
