COBALT OXIDE POWDER PRODUCTION METHOD Russian patent published in 2019 - IPC C01G51/04 B22F9/16 H01M4/52 

FIELD: technological processes.

SUBSTANCE: invention can be used for the lithium-ion batteries cathode and anode materials production. Cobalt oxide Co₃O₄ powder production method includes the 6-hydrous nitric cobalt and gelling agent initial mixture heating, with the produced powder subsequent annealing. Initial mixture additionally contains the basic hydrous cobalt carbonate at weight ratio of CoCO₃⋅Co(OH)₂⋅H₂O:Co(NO₃)₂⋅6H₂O equal to 1:0.42. As the gelling agent, the 270–510 g of glycine and 440–730 g of 1-hydrous citric acid mixture per 1 kg of the obtained product is used. Initial mixture is heated to 300–350 °C. Obtained powder annealing after the initial mixture heating is carried out at 850–900 °C for 4–5 hours.

EFFECT: invention allows to reduce the electricity costs due to the utilization of excess thermal energy in the powder of cobalt oxide production process and the process simplification.

1 cl, 3 ex