| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium secondary battery having excellent high temperature characteristics, especially excellent high temperature storage characteristics. <P>SOLUTION: The lithium secondary battery has a positive active material containing lithium transition metal oxides of at least two kinds having different crystal systems, and capable of inserting/removing lithium ions, and at least one kind of two kinds or more lithium transition metal oxides is a plural-phase compound having a plurality of different phase structures (heterogeneous phase structure). <P>COPYRIGHT: (C)2006,JPO&NCIPI |
