| 摘要 |
PURPOSE:To prevent an oxidation reduction reaction from occurring between electrolytic manganese dioxide and conductive carbon in a positive mix for the prevention of gassing so as to provide improved preservation of battery performance and an extended discharge duration time by setting low surface potential. CONSTITUTION:Electrolytic manganese dioxide is manufactured which is characterized in that its surface potential is 150 to 240mV (vs. Hg/HgO (40wt.% KOH)). In a process subsequent to electrolysis, the surface potential is adjusted using a wet method employing a reducing agent, to manufacture the electrolytic manganese dioxide. In another method for manufacturing the electrolytic manganese dioxide, the surface potential is adjusted by manufacture through electrolysis using an electrolyte in which the molar ratio of manganese to sulfuric acid is 1.5 to 100. Further, the electrolytic manganese dioxide is used as positive active material to manufacture a manganese dry battery or alkaline manganese dry battery. |
