| 简介 |
Provided is a nonaqueous electrolyte secondary battery which is capable of suppressing structural change of a positive electrode active material at high voltages. This nonaqueous electrolyte secondary battery is provided with : a positive electrode which has a positive electrode active material capable of absorbing and desorbing lithium ions; a negative electrode which has a negative electrode active material capable of absorbing and desorbing lithium ions; and a nonaqueous electrolyte. The positive electrode active material has a rare earth compound on the surface, and contains a lithium cobalt composite oxide that contains at least one element selected from the group consisting of Ni, Mn, Ca, Cu, Zn, Sr, Ge, Sn, Si, P, Nb, Mo, S and W. This nonaqueous electrolyte secondary battery is charged so that the potential of the positive electrode is 4.53 V or more based on lithium. |
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