UNAMALGAMATED ZINC ALKALINE BATTERY

摘要

PURPOSE: To restrict deterioration of a zinc utilization factor, and improve discharging characteristics by adding CaO, MgO, AlO in specified quantity to a gel zinc negative electrode comprising negative electrode active material mainly comprizing unamalgamated zinc powder mixed with gelatinizer and alkaline electrolyte. ;CONSTITUTION: To zinc powder and gelatinizer comprizing polyacrylic acid, CaO, MgO by 10-10000ppm respectively, and Al₂O₃ by 10-1000ppm to zinc are added and mixed. Electrolyte of alkaline solution comprising potassium hydroxide is added to this mix to be agitated to provide a gel zinc negative electrode 7, and a positive electrode catalyst layer 5 is composed of active coal, graphite, manganese dioxide, etc. In a positive electrode case 1 also acting as a positive electrode terminal and having an air hole 2 at a bottom part, an air diffusion paper 3, a water repellent film 4, a layer 5, a separator 6, and the negative electrode 7 are inserted in order from the bottom part. An aperture part of the case 1 is folded toward a sealing plate 8 also acting as a negative electrode terminal on it through a gasket 9 of nylon to seal a battery. Deterioration of a zinc utilization factor by unamalgamated property can thus be restricted, thereby discharging characteristics can be improved.;COPYRIGHT: (C)1995,JPO