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• Main Authors: ITO,KENJI, TATSUMI,KOJI, HARATSUKA,KAZUYA, NAKAOKA,SHOGO, RYOJI,YAMADA
• Format: Patent
• Language: Finnish; Swedish
• Published: 29.02.2008
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a process for a lithium-containing composite oxide for a positive electrode for a lithium secondary battery, which has a large volume capacity density and high safety, and is excellent in the charge and discharge cyclic durability and low temperature characteristics. A process for producing a lithium-containing composite oxide represented by the formula LipNxMyOzFa (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, 0.95@x@2.00, 0<y@0.05, 1.9@z@4.2 and 0@a@0.05), which comprises firing a mixture of a lithium source, an N element source, an M element source and if necessary, a fluorine source, characterized in that an aqueous solution having an M element source dissolved therein is mixed with an N element source powder or its pulverized product to form a slurry; if necessary after being pulverized, the slurry is dried for granulation to obtain a granulated product, which is mixed with a lithium source powder and if necessary, a fluorine source powder to obtain a mixture; and the mixture is fired at from 700 to 1,100° C. in an oxygen-containing atmosphere.