| 摘要 |
A lead accumulator comprises a grid substrate formed of a Pb-Sb alloy containing one of Na, Li and K and Sn, and an electrolyte containing alkaline earth metal ions. As the grid substrate, use may be made of a lead alloy containing Ca and Sn or Ca, Sn and Sb or Ca, Sn, Sb and Al. Grids substrates obtained from a plate piece formed by making a Pb-Ca base alloy plate integral with a Pb-Sn base alloy plate may be used in combination with an electrolyte containing alkaline metal ions, alkaline earth metal ions or phosphoric acid ions. An electrode obtained by plating a Sb-free Pb-Ca alloy substrate with Sn or a Pb-Sn alloy may be used in combination with an electrolyte containing at least one of alkaline metal ions and alkaline earth metal ions. The electrode may further be immersed in dilute sulfuric acid for the achievement of more improved effects. The electrolyte may contain alkaline metal ions in a concentration of at least 500 ppm and, at the same time, ions of an alkaline earth metal having no water and/or crystallized water. |
