METHOD FOR PREPARING SECONDARY BATTERY CATHODE MATERIAL
A method of manufacturing a secondary battery cathode material includes preparing Li 2 O powder by separating CO 2 from Li 2 CO 3 powder, forming a mixed powder by mixing the Li 2 O powder with nickel-cobalt-manganese (NCM) precursor powder, and firing the mixed powder using a rotary kiln.
1 . A method of manufacturing a secondary battery cathode material, comprising:
preparing Li 2 O powder by separating CO 2 from Li 2 CO 3 powder;
forming a mixed powder by mixing the Li 2 O powder with nickel-cobalt-manganese (NCM) precursor powder; and
firing the mixed powder using a rotary kiln.
2 . The method of claim 1 , wherein:
the preparing of the Li 2 O powder includes:
charging the Li 2 CO 3 powder into a firing furnace in a high-temperature atmosphere; and
separating the CO 2 from the Li 2 CO 3 powder by supplying air or oxygen into the firing furnace.
3 . The method of claim 1 , wherein:
the forming of the mixed powder includes:
pulverizing the Li 2 O powder; and
mixing the Li 2 O powder with the NCM precursor powder; and
forming the mixed powder in a form of granules or briquettes.
4 . The method of claim 1 , wherein:
the forming of the mixed powder may be performed in a closed space in a nitrogen atmosphere.
5 . The method of claim 1 , wherein:
the firing of the mixed powder using the rotary kiln includes:
charging the mixed powder into an inside of the rotary kiln in a high-temperature atmosphere in which a refractory coating layer is formed on an inner surface of the rotary kiln and a spiral baffle is installed in the rotary kiln; and
firing the mixed powder inside the rotary kiln.