| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery capable of charging at a high voltage and having high charging discharging cycle characteristics. <P>SOLUTION: This nonaqueous secondary battery has a positive electrode, a negative electrode capable of storing and releasing lithium, and an noaqueous electrolyte in which a lithium salt is dissolved, the positive electrode contains an active material having a lithium cobalt composite oxide as the main component, the nonaqueous electrolyte contains a nonaqueous solvent containing 50 vol.% or more of γ-butyrolactone, and the open circuit voltage between terminals when full charged is 4.3 V or more. <P>COPYRIGHT: (C)2003,JPO |
