| 摘要 |
PURPOSE:To provide a zinc alkaline battery which uses zinc alloy powder out of amalgamation and with no lead added and which presents low risk of pollution, safety, and high performance. CONSTITUTION:A zinc alkaline battery has a gel-form negative electrode using as negative electrode active material a powder of zinc alloy which contains 0.01-0.1wt.% indium, 0.001-0.01wt.% bismuth, 0.001-0.01wt.% aluminum, 0.001-0.01wt.% gallium, and one or more of calcium, strontium, and barium in a content 0.001-0.05wt.% and which is not amalgamated and is free of lead addition. The indium compound exhibits a large effect for suppressing gas generation in case battery is partially discharged, while tetrabuthyl ammonium hydroxide attaches to the surface of zinc alloy powder, suppresses self-discharge, suppresses gas generation in undischarged state to a further degree, decreases the oppotunity of zinc powder contacting with impurities eventually included in the gel-form negative electrode, and sinks risk of gas generation due to impurities to a further degree. |
