CATHODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD OF PRODUCING CATHODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

To prepare a fluorinated cathode active material having a guest cation comprising sodium or lithium included therein in a nonaqueous electrolyte secondary battery, an alkali metal fluoride represented by the formula AF and a transition metal fluoride represented by the formula M'F2 are treated by chemical milling to thereby give a fluoride AM'F3. A satellite ball mill is preferably employed in the chemical milling treatment.