| 摘要 |
PURPOSE:To prevent any decrease in the discharge capacity and any liquid leakage of an air cell so as to improve its characteristics by specifying the concentration and the proportion of a caustic alkali in a gel-like zinc negative electrode and by selecting a proper gelling agent. CONSTITUTION:In an air cell constituted using a gel-like zinc negative electrode, an aqueous solution of caustic soda or caustic potash having a concentration of 4-12mol/l is used as alkali electrolyte. The proportion of the alkali electrolyte in the gel-like zinc negative electrode is adjusted to be within the range of 15- 30wt%. A carboxyvinyl polymer having a molecular weight of 100,000-5,000,000 is used as a gelling agent and the proportion of the gelling agent is adjusted to within the range of 0.3-3%. The gel-like zinc negative electrode is made by completely dissolving a carboxyvinyl polymer in an alkali solution to produce a gel before the remaining amount of an amalgamated zinc powder is kneaded into the gel to homogeneously disperse the powder in the gel. Since the gelling agent used in this invention has a superior liquid-holding property, it is possible to constitute an air cell in which no decrease in the discharge capacity is caused and no liquid leakage occurs. |
