| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive electrode activve material by which a nonaqueous electrolyte lithium ion secondary battery with high capacity and excellent cycle property can be manufactured, and to provide a nonaqueous electrolyte lithium ion secondary battery using the same. <P>SOLUTION: The positive electrode active material contains a lithium compound oxide having electron conductivity σ satisfying the relation; 10<SP>-4</SP>≤σ≤10<SP>-1</SP>S/cm, expressed by general formula; Li<SB>x</SB>Ni<SB>(1-Y-Z)</SB>Co<SB>Y</SB>Mn<SB>Z</SB>A<SB>a</SB>O<SB>2</SB>(1) (in the formula, A represents an element like Fe, V, Cr, Mn, Ti, Mg, Al, B, or Ca, and X, Y, Z satisfy the relations 0.05≤X≤1.10, 0.10≤Y+Z≤0.70, 0.05≤Z≤0.40, 0≤a≤0.1 respectively). The nonaqueous electrolyte lithium ion secondary battery comprises a positive electrode and a negative electrode containing positive electrode active material and negative electrode active material respectively which can dope and dedope lithium ions and a nonaqueous electrolyte with an electrolyte dispersed in a nouaqueous medium, of which, the positive electrode active material contains the lithium compound oxide. <P>COPYRIGHT: (C)2004,JPO |
