| 摘要 |
PURPOSE:To increase capacity at high temperature and cycle life by using a specified hydrogen occlusion alloy or its hydride in a negative electrode. CONSTITUTION:A hydrogen occlusion alloy or its hydride indicated in the gen eral formula Ln1-xAxNialpha-xMy (where, Ln is one or more of lanthanide series metals and Ca, A is one or more of Zr, Hf, and Nb having negative hydride formation heat, M is one or more of Mn, Mo, and Cr, and 0<x<0.4, 4.5<alpha<5.5, 0<y<3) is used in a negative electrode. When an alloy in which each metal is uniformly dissolved is used in the negative electrode, corrosion resistance is increased, hydrogen dissociation equilibrium pressure is decreased, and hydro gen occlusion ability and catalytic action for ionization are increased. Therefore, capacity at high temperature and cycle life of the battery are increased. |
