LITHIUM COBALTATE AGGREGATE, COBALT OXIDE AGGREGATE, METHOD FOR MANUFACTURING THE SAME AND LITHIUM CELL USING LITHIUM COBALTATE AGGREGATE

• Main Authors: OGASAWARA MAKOTO, SUZUKI MITSUO
• Format: Patent
• Language: English
• Published: 26.02.2002
• Edition: 7
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a new lithium cobaltate aggregate having the performance in good balance with improved stability and safeness as a cell material without decreasing the cell characteristics, to provide a new cobalt oxide aggregate to be used for the manufacture of the above aggregate, a method for manufacturing these aggregates, and to provide a lithium cell using the lithium cobaltate aggregate as the positive pole active material. SOLUTION: The lithium cobaltate aggregate having 1 to 30 μm average particle size as the secondary particles is obtained by aggregating primary particles having 0.05 to 5 μm average particle size, and by using the aggregate as the positive pole active material of a lithium cell, the lithium cell is excellent in the cell characteristics, stability and safeness. The cobalt oxide aggregate having 0.5 to 30 μm average particle size as the secondary particles is prepared by aggregating primary particles having 0.01 to 2 μm average particle size and is useful to manufacture the above lithium cobaltate aggregate.