abstract |
A positive electrode active material for a nonaqueousnelectrolyte secondary battery includes at least a lithium-containingnmanganese layered composite oxide representednby the general formula Li1-xMn1-yMyO2-δ. The lithium-containingnmanganese composite oxide is deficient in lithiumnwith respect to the stoichiometric composition of a layeredncrystal structure represented by the general formula LiMeO2.nPart of Mn is replaced by a substitute metal such as Co, Ni, Fe,nAl, Ga, In, V, Nb, Ta, Ti, Zr, Ce or Cr. |