| 摘要 |
PURPOSE:To manufacture a manganese dry battery having good discharge performance by treating electrolytic MnO2 washed with water or neutralized with alkaline soultion, with titanium salt solution, and using it as a positive active material. CONSTITUTION:Electrolytic MnO2 washed with water or neutralized with alkaline solution of Na or NH4 is treated with titanium salt solution or TiO2 hydride and water to replace proton and Na<+> or NH4<+> on the surface of MnO2 with Ti<3+> or Ti<4+>. Thereby, an intersecting point of potential-pH line moves to an active side and potential change is kept small in a wide pH range. A manganese dry battery using this MnO2 shows good discharge performance with decreased voltage drop from a middle stage of discharge and suppressed impedance increase. |
