| abstract |
Provided is a Co-based 5V spinel-type lithium manganese-containing complex oxide which not only has an operating potential of 4.5V or higher, but also can enlarge the capacitance range in the 5.5-5.0V region and can also increase energy density. This spinel-type lithium cobalt manganese-containing complex oxide has a crystal structure belonging to the space group Fd-3m, and is shown in general formula [Li x (Co y Mn 3-x-y )O 4-5 ] (in the formula, 0.90 ≦ x ≦ 1.15, 0.75 ≦ y ≦ 1.25), wherein the crystal particle size measured by the Rietveld method using the fundamental method is 100nm-200nm, the Li-O interatomic distance is 1.80Å-2.00Å, and the distortion is 0.20-0.50. |