METHOD OF MANUFACTURING CHEMICAL MANGANESE DIOXIDE FROM TERNARY SYSTEM CATHODE ACTIVE MATERIAL, CHEMICAL MANGANESE DIOXIDE MANUFACTURED BY THIS METHOD, AND SECONDARY BATTERY INCLUDING CHEMICAL MANGANESE DIOXIDE

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing chemical manganese dioxide by selectively precipitating only Mn by use of oxidant from a sulfur reducing leaching solution, for selectively separating the Mn from a ternary system cathode active material (Li(NiMnCo)O) as a cathode active material of a lithium ion battery to be used for a mobile phone or an electric car.SOLUTION: The method of manufacturing chemical manganese dioxide from a ternary system cathode active material of the present invention includes: (a) a first leaching step of leaching ternary system cathode active material powder with a mixture of sulfur and a reducing agent; (b) a second leaching step of successively leaching the first leaching solution; and (c) a step of adding NaSOto the second leaching solution, and selectively precipitating Mn to manufacture chemical manganese dioxide.