| 摘要 |
PURPOSE:To obtain an alkaline battery of a large capacity and a low cost, which has an anode made of lead dioxide and a cathode made of zinc, by using a caustic alkali solution containing phosphate ions as either the anode-side electrolyte only or both the anode-side and the cathode-side electrolyte. CONSTITUTION:A battery is constituted by the combination of an anode 3 made up of lead dioxide used as an active material and about 10% of graphite, a zinc cathode 4 made up of an amalgamated zinc carboxymethylcellulose, a separator 5 consisting of a grafted polyethylene and cellophane, and a liquid holding material 6 made of nonwoven cloth. A caustic alkali solution which is made up of, for example, 2mol of NaOH, 0.2mol of Na3PO4 and 0.2mol of ZnO and which contains phosphate ions is used as either the anode-side electrolyte only or both the anode-side and the cathode- side electrolyte. When a semipermeable membrane such as cellophane is used for the separator 5, an electrolyte usually used for an alkaline battery may be used as the cathode-side electrolyte. By the means mentioned above, the preservation characteristic of the battery is improved, and the lead dioxide can be used in the battery. Consequently, a battery of a large capacity density can be obtained at a low cost. |
