A METHOD FOR PREPARING LITHIUM MANGANESE SPINEL OXIDE HAVING IMPROVED ELECTROCHEMICAL PERFORMANCE

摘要

THE PRESENT INVENTION RELATES TO A METHOD FOR PREPARING A LITHIUM MANGANESE COMPLEX OXIDE Li1+xMn2-xO4 (0x0.12) USED AS A CATHODE ACTIVE MATERIAL OF A LITHIUM OF LITHIUM ION SECONDARY BATTERY.THE PRESENT INVENTION PROVIDES A METHOD FOR PREPARING A MANGANESE COMPOUND COMPRISING THE STEP OF SIMULTANEOUSLY APPLYING A MECHANICAL FORCE AND HEAT ENERGY TO A MANGANESE COMPOUND TO REMOVE DEFECTS PRESENT IN PARTICLES OF THE MANGANESE COMPOUND AND TO CONTROL THE AGGREGATION OF PARTICLES AND THE SHAPE OF THE AGGREGATED PARTICLES, A METHOD FOR PREPARING A LITHIUM MANGANESE COMPLEX OXIDE WITH A SPINEL STRUCTURE USING THE MANGANESE COMPOUND PREPARED BY THE ABOVE METHOD AS A RAW MATERIAL, AND A LITHIUM OR LITHIUM ION SECONDARY BATTERY USING THE LITHIUM MANGANESE COMPLEX OXIDE WITH A SPINEL STRUCTURE PREPARED BY THE ABOVE METHOD AS A CATHODE ACTIVE MATERIAL. A LITHIUM OR LITHIUM ION SECONDARY BATTERY USING THE LITHIUM MANGANESE COMPLEX OXIDE WITH A SPINEL STRUCTURE PREPARED FROMTHE MANGANESE COMPOUND WITHOUT DEFECTS INSIDE PARTICLES AS A CATHODE ACTIVE MATERIAL HAS EXCELLENT CHARGE/DISCHARGE CHARACTERISTICS AND CYCLIC PERFORMANCE.(FIG 1)