| 摘要 |
To provide a process for producing a lithium-containing composite oxide for a positive electrode for a lithium secondary battery, which is excellent in the volume capacity density, safety, charge and discharge cycle durability and low temperature characteristics. A process for producing a lithium-containing composite oxide represented by the formula LipNxMmOzFa (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than N, 0.9≦̸p≦̸1.2, 0.97≦̸x<1.00, 0<m≦̸0.03, 1.9≦̸z≦̸2.2, x+m=1 and 0≦̸a≦̸0.02), which process comprises firing a mixture of a lithium source, an N element source and an M element source, and if necessary, a fluorine source, in an oxygen-containing atmosphere, characterized in that as the M element source, an aqueous solution of a ketocarboxylate compound having the M element, at least one carboxyl group and at least one carbonyl group in its molecule, is used.
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