| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery capable of preventing deterioration of battery performance due to decomposition of an electrolyte by suppressing oxidative decomposition of the electrolyte during charging/discharging, in a lithium ion secondary battery having high battery voltage by using a positive electrode active material with high potential. <P>SOLUTION: In a lithium ion secondary battery provided by the present invention, a positive electrode 64 comprises: a positive electrode collector 62; and a positive electrode mixture layer 66 formed on the collector and including at least a positive electrode active material 70. The positive electrode active material is a compound containing high-potential lithium and having a discharge potential of 4.5 V or more at a metal lithium electrode standard. A surface of the compound containing high-potential lithium is covered with a carbon material 72, and the carbon material has an average particle size of 50 nm or less. <P>COPYRIGHT: (C)2013,JPO&INPIT |
