| abstract |
Lithium composite metal oxides prepared by mixing at least one type ofnhydroxides, oxides, and carbonates of a metal selected from the group of transitionnmetal, IIA metal, and IIIA metal, and a lithium compound of which the D50 value is innthe range 5 to 50 µm, the D90 value is 90 µm or smaller, and in which particles 100 µmnor greater do not exist, and calcinating in the temperature range 700 to 1000°C for 2 ton30 hours, and grinding, are used as the active material of a positive electrode which isnlaminated with a negative electrode with a separator interposed and spirally woundnthereby forming an electrode group. By using the positive active materials prepared innthis manner, discharge capacity and cycle characteristic of a non-aqueous electrolytensecondary cell can be improved. |