LITHIUM PRIMARY CELL, CATHODE ACTIVE MATERIAL THEREFOR, AND METHOD FOR MANUFACTURING MANGANESE DIOXIDE FOR CATHODE ACTIVE MATERIAL

摘要

A lithium primary cell includes a cathode active material containing 0.05 to 2.0 parts by weight of phosphorus with respect to 100 parts by weight of manganese dioxide. A cathode active material for a lithium primary cell contains 0.05 to 2.0 parts by weight of phosphorus with respect to 100 parts by weight of manganese dioxide. A method for manufacturing electrolytic manganese dioxide comprises adding at least one member selected from the group consisting of phosphoric acid, phosphorous acid, hypophosphorous acid and compounds thereof to the electrolyte during the manufacture of electrolytic manganese dioxide using manganese sulfate and a sulfuric acid solution as the electrolyte.