| 摘要 |
PURPOSE:To increase heavy-load discharge performance by using specifically treated chemical manganese dioxide as a positive active material and carbon black having specified specific surface area as a positive conductive material. CONSTITUTION:A positive mix 2 is accommodated in a positive container 1 made of stainless steel. Manganese trioxide (Mn2O3) prepared by baking manganese sulfate crystal is immersed in a sulfuric acid solution to convert into manganese dioxide (MnO2), and this manganese dioxide is washed, dried, and pressed to obtain chemical manganese dioxide, then this chemical manganese dioxide is heated for 8 hours at 400 deg.C in the atmosphere. This chemical manganese dioxide is mixed with carbon black whose specific surface area is 90-150m<2>/g and a binder, then this mixture is molded in a pellet to form the positive mix 2. A separator 3 and a negative electrode 4 are placed on the positive mix 2, and a nonaqueous solvent electrolyte is impregnated in the separator 3. The opening of the positive container 1 is crimped against a negative container through a gasket 5 to seal a battery. The heavy-load discharge performance of the battery is increased. |
