Mn-based Cathode Material with Improved Electrochemical performance and Lithium Secondary Battery containing the same

摘要

The present invention relates to a positive electrode active material comprising lithium manganese oxide, graphite, a conductive carbon composite, and a lithium secondary battery comprising the lithium manganese oxide and the lithium secondary battery. The lithium manganese oxide having a very low electrochemical activity is milled together with graphite and conductive carbon, It is possible to provide Li ₂ MnO ₃ with an excellent electrochemical activity in a simple and economical manner even at a relatively low voltage and to have a high level of activity stably and in a short time by including the complex, And a lithium secondary battery comprising the same.