| 摘要 |
PROBLEM TO BE SOLVED: To increase uniformity of a crystal phase by setting moisture content of Li compound to a specific amount when mixing Co compound with Li compound. SOLUTION: Composite oxide is represented by a general formula LixMyCO1-yO2. In the formula, x: 0.9-1.1, y: 0-0.9, M: at least one or more elements of Ni, Mn, Fe, V, Cr, Al, Mg, Ti, Y, Ce, Nb, Zr, Si, and Ca. This composite oxide is produced by mixing Co compound with Li compound setting moisture content of Li compound to 0.15-5 wt.% and sintering them. As the Co compound, one or more of cobalt oxide, cobalt hydroxide, cobalt oxyhydroxide, and cobalt carbonate are preferable. As the Li compound, lithium carbonate or lithium hydroxide is used, and preferably, is added as micro powder with 1-10 μm weight-average grain size. |
