METHOD FOR THE PREPARATION OF A POSITIVE ACTIVE MATERIAL BASED ON MANGANESE DIOXIDE FOR AN ELECTROCHEMICAL GENERATOR, ACTIVE MATERIAL THUS OBTAINED AND GENERATOR THEREOF

摘要

The invention relates to a process for preparing a positive active material for a galvanic cell based on manganese dioxide. The starting material is a manganese dioxide other than beta -MnO2, an aqueous solution is added and the mixture is heated to a temperature equal to or higher than 100 DEG C. This temperature is maintained until a form of manganese dioxide is obtained whose infrared absorption maximum has a wave number between 530 cm<-1> and 560 cm<-1>. ……