A SPINEL-TYPE LITHIUM MANGANESE COMPLEX OXIDE FOR A CATHODE ACTIVE MATERIAL OF A LITHIUM SECONDARY BATTERY

摘要

The invention provides a spinel-type lithium manganese complex oxide for a cathode active material of a lithium secondary battery, which is characterized in that said spinel-type lithium manganese complex oxide has an average particle diameter between 1 and 5 micrometers and a specific surface area between 2 and 10 m<2>/g. The invention also provides a process for producing the spinel-type lithium manganese compound oxide comprises the steps of 1)atomizing and pyrolyzing at least one of an aqueous solution and an alcohol solution of compounds containing metallic elements constituting a spinel-type lithium manganese complex oxide to obtain said compound oxide, and 2)annealing said spinel-type lithium manganese complex oxide to increase the average particle diameter thereof to between 1 and 5 micrometers and adjust the specific surface area thereof to between 2 and 10 m<2>/g. The spinel-type lithium manganese complex oxide which is useful as a cathode active material of a lithium secondary battery exhibits a large charge-discharge capacity and excellent charge-discharge cycle characteristics, and it can be used in a 4-V region secondary battery.