Powder of electrolytic manganese dioxide and process for producing the same

摘要

A powder of electrolytic manganese dioxide and a process for producing the same are disclosed. The powder has a maximum particle diameter of 100 mum or smaller, a content of 1 mum and smaller particles of lower than 15% by number, and a median diameter of from 20 to 60 mum, and which has a potential of 270 mV or higher in terms of the potential of a suspension of the powder in 40% aqueous KOH solution as measured using a mercury/mercury oxide reference electrode as a base.