| 摘要 |
PURPOSE:To reduce the amount of the air residual in a positive electrode body and to improve the discharge capacity by specifying the mean particle diameters of the manganese dioxide and the graphite. CONSTITUTION:Manganese dioxide of the mean particle diameter 80 to 300 mum and graphite of the mean particle diameter 0.5 to 10 mum are used. Since the actual weight of manganese dioxide per unit volume as a positive electrode composite is increased while the surface area is decreased by using a coarse manganese dioxide, the air taken in around the manganese dioxide when it is stirred up or granulated can be degased easily by the pressure of the formation. By pressurizing and forming the positive electrode composite mixed with such a manganese dioxide and the graphite of the designated mean particle diameter of 0.5 to 1.0 mum, a positive electrode body with a high reaction area can be manufactures easily, and a dry battery with a high discharge capacity can be obtained. |
