| 摘要 |
PURPOSE:To obtain positive electrode having superior discharge characteristic by heating positive electrode mixed agent containing dispersant and manganese dioxide and removing dispersant and forming said mixed agent into a prescribed form. CONSTITUTION:Positive electrode substance is prepared as follows: into manganese dioxide which is heated in 360-390 deg.C as active substance, carbon powder conductive agnet as, fluoro-resin powder such as poly-tetra-fluoroethylene as binder, and surfactant as dispersing agent are mixed. Said positive electrode mixture is heated, and dispersant is volatilized, and then positive electrode mixture is formed into the positive electrode 1 in a prescribed form. As dispersant, is used non ionic surfactant such as aromatic alcohol having the number of carbons from 12 to 18, aromatic amine, and polyoxyethylene derivative. The heating temperature described above of these dispersant is 230-330 deg.C enough to volatilize dispersant. Thus, the dispersion performance of bonding agent is improved, and uniformity and molding performance of positive electrode is improved, and inconvenience due to the existence of dispersant is eliminated, and thus a positive electrode having superior discharge characteristic can be obtained. |
