| 摘要 |
PURPOSE:To provide a zinc air cell having good leakage resistance to excess discharge, good discharge performance, and short activation time by spacifying an electrolyte composition in a desired region. CONSTITUTION:An electrolyte composition existing inside a region surrounded by lines connecting A, B, C, and D in three- component system diagram indicated by weight percentage of potassium hydroxide (KOH), zinc oxide (ZnO), and water (H2O). A positive electrode 2 consists of a catalytic layer 2 and a nickel net 3 and has a thickness of 0.45mm.. The catalytic layer 2 is consisted of 50pts.wt. active carbon, 80pts.wt. manganese dioxide which is treated at 550 deg.C, 20pts.wt. acetylene black, and 25pts.wt. polytetrafluoroethylene (PTFK). A negative electrode 4 is consisted of amalgamated zinc powder having the weight corresponding to a theoretical capacity of 440mAh and 120mul of various kinds of electrolytes and small amount of thickening agent. A separator 5 is consisted of polypropylene porous film 6 and absorvent material 7. |
