| 摘要 |
PURPOSE:To improve the flatness of the discharge curve of the negative electrode of an alkaline storage battery or a similar battery and to increase its cycle life by forming the negative electrode from an alloy represented by general formula LnNialphaMnbeta which is thermally treated at a temperature below the melting point of the alloy. CONSTITUTION:A hydrogen occlusion alloy which can electrochemically occlude or release hydrogen is used as the negative electrode for an alkaline storage battery or a similar battery. The negative electrode is made by heating an alloy represented by general formula LnNialphaMnbeta (Ln is lanthanum or a Misch metal containing lanthanum.; 4<alpha+beta<5.5; 0<beta) either in a vacuum or in an atmosphere of an inactive gas or hydrogen gas at a temperature of at least 900 deg.C for at least 1hr. As a result, the homogeneity of the alloy is improved and hydrogen occluded into the alloy remains in a constant energy state. Therefore, it is possible to improve the flatness of the discharge curve and to increase the cycle life of the electrode. |
