Reaction apparatus and method
AssigneesPosco, Research Institute of Industrial Science & Technology
InventorKi-Sung You
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Abstract
Provided are an apparatus and a method for reaction for use in a co-precipitation reaction for preparing a catalyst or a cathode active material for a lithium secondary battery, which injects a raw material (a solution) at least between impellers according to the solution level in a vessel, thereby making a stirring speed uniform and, in particular, minimizing a concentration difference between solutions. The apparatus for the reaction may comprise: a reaction vessel; a stirring means provided inside the reaction vessel and having multistage impellers; and a raw material injecting means, comprising at least one injection nozzle connected to the reaction vessel, for injecting a raw material at least between impellers.
Claims21
A reaction apparatus, comprising:
- a reaction vessel;
- a stirring means provided inside the reaction vessel and having multistage impellers;
- and
- a raw material-injecting means connected to the reaction vessel and comprising at least one injection nozzle injecting a raw material into an interspace between impellers.
A reaction method, comprising:
- metal solution injection involving injecting a metal solution obtained by mixing a core solution and a shell solution at a pre-determined ratio into a reaction vessel at a pre-determined flow rate;
- solution injection involving injecting other solutions into the reaction vessel at a pre-determined flow rate;
- and
- co-precipitation involving stirring the other solutions with the metal solution injected into the reaction vessel to prepare a cathode active material for a lithium secondary battery.
(canceled)
Dependencies are inferred from the claim text.