Lithium-cobalt-manganese oxide (LICOXMN2-XO4) of cathode material of 5V class lithium secondary battery and its manufacturing method

摘要

The present invention relates to a positive electrode material of a lithium secondary battery, and proposes a lithium-cobalt-manganese oxide as a positive electrode material, and a production method thereof and a lithium secondary battery using the same. Generally, a lithium secondary battery is composed of a cathode, an electrolyte, and a cathode. Lithium-manganese oxide, known as a conventional 4V anode material, is inexpensive and has a relatively high capacity of 110 mAh / g. However, it is difficult to produce a stoichiometric compound, and a reduction in capacity There is a disadvantage that electrode characteristics are deteriorated. The present invention proposes a lithium-cobalt-manganese compound in which cobalt is substituted for manganese in order to improve the above disadvantages. The lithium-cobalt-manganese compound is structurally stable as compared with the lithium-manganese compound, so that the reduction in capacity due to cycle repetition is small and can be applied to a high voltage.