ELECTROLYTIC MANGANESE DIOXIDE POWDER, AND MANUFACTURING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide an electrolytic manganese dioxide powder having a large specific surface area, together with its manufacturing method, which is used as a positive electrode active material for an alkali manganese battery. SOLUTION: The electrolytic manganese dioxide powder has a maximum particle size of 100 μm or less while the number of particles whose diameter is 1 μm or larger is less than 15%, with its median size being 20-60 μm. A specific surface area is 50 m<2> /g or larger when measured by a mixed gas adsorption process of nitrogen and helium after the powder is deaerated in the nitrogen at 150 deg.C.