| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of re-processing powder, containing aggregation particles which could not pass through the mesh screen of a centrifugal classifier, easily and efficiently when producing micro positive electrode material powder for lithium secondary battery by the centrifugal classifier.SOLUTION: When producing micro positive electrode material powder for lithium secondary battery by classifying raw positive electrode material powder for lithium secondary battery containing rough powder by a centrifugal classifier, the production method of micro positive electrode material powder for lithium secondary battery processes the powder, containing aggregation particles which could not pass through the mesh screen of the centrifugal classifier, in the following steps: (1) pulverizing the aggregation particles in the powder to produce powder, and (2) supplying the powder obtained in the step (1) to the centrifugal classifier and classifying the powder again. |
