| 摘要 |
PROBLEM TO BE SOLVED: To remarkably increase the discharge capacity of a battery in an initial stage and after 50 cycles by coating the surface of a specified lithium- nickel mixed oxide with a lithium-transition metal M mixed oxide. SOLUTION: To produce an electrode active material; compounds of transition metals M (M stands for Co, Mn, and/or Fe including metals partly containing Ni) and a lithium compound are dissolved or suspended in a solvent, a lithium- nickel mixed oxide having a general formula Lix Niy Nz O2 (N stands for elements except Li, Ni, and 0; 0.8<z<1.2; 0.8<y +z<1.2; 0<=z<0.2) is further added to give a slurry, and the slurry is dried and fired. The obtained electrode active material has high standing stability and even if left in atmosphere containing moisture, the material does not lower the capacity of a battery in the case the material is dried and then the battery is assembled using the material. Moreover, without causing trouble such as heat generation, the material keeps excellent safety and can be used for both cathode and anode. |
