| 摘要 |
PROBLEM TO BE SOLVED: To obtain a positive electrode for a lithium secondary battery which holds excellent energy density, and has an excellent cycle property, by using a positive electrode active material in which Al or Fe are fused to the LiCO2 at a small amount and evenly to the Co. SOLUTION: As a positive electrode active material for a lithium secondary battery, a solid solution consisting a compound which is shown in the formula I is used. In the formula I, M<3+> is one or more of Al<3+> and Fe<2+> , and x and y are 0.01<x<0.05, 0.9<=y<=1.1. The positive electrode active material shown in the formula I can be obtained, by mixing and reacting a compound having a hydrotarsite class compound shown in the formula II as the main component, and a lithium compound, in the water or an alcohol medium, in order to make the Li/Ni+(M<3+> and/or M<2+> ) mol ratio to 0.9 to 1.2, and after drying the resultant slurry, baking at about 600 to 900 deg.C for 1 to 2h in the acidic ambiance. In the formula II, A<n-> is an anion with n value, 0<=x2 <=0.05, and 0<=m<3. The lithium compound is LiOH. |
