| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize good battery characteristics and prevention of swelling due to gas generation at the same time. <P>SOLUTION: An average particle size and a specific surface area of a composite oxide of lithium as a cathode active substance and transition metal are to be in an appropriate range, and a fluorine treatment is applied on it. The average particle size of the composite oxide is 3 μm to 24 μm, and the specific surface area 0.10m<SP>2</SP>/g to 0.92m<SP>2</SP>/g. Further, as a result of the fluorine treatment, 0.2 to 3.5 weight percent of fluorine atoms against the composite oxide exist on the surface of the complex oxide as an active substance material. The fluorine treatment is made by having fluorine treatment gas contacted with a fluorine gas partial pressure of ≥5%. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
