| 摘要 |
PURPOSE:To produce a hydrogen storage alloy remarkably improved in the amt. of hydrogen to be occluded, plateau properties, response characteristics to the change of hydrogen pressure or the like, in a hydrogen storage alloy constituted of Ti, V and Ni, by prescribing each content of Ti, V and Ni. CONSTITUTION:In a hydrogen storage alloy expressed by the general formula: TixVyNiz, the compsn. (x) of Ti, the compsn. (y) of V and the compsn. (z) of Ni are limited to the range surrounded by the A point in th figure: Ti5V90Ni5, the B point: Ti5V75Ni20, the C point: Ti30V50Ni30 and the D point: Ti30V65Ni5 (namely, by atom, 5%<=x<=30%, 50%<=y<=90% and 5%<=z<=20%). Moreover, the range surrounded by the E point: Ti25V65Ni10, the F point: Ti15V75Ni10, the G point: Ti15V67.5Ni17.5 and the H point: Ti25V57.5Ni17.5 (namely, 15%<=x<=25%, 57.5%<=y<=75% and 10%<=z<=17.5%) is preferably regulated. In this way, the hydrogen storage alloy used for the hydrogen occlusion electrode of an alkali secondary battery or the like can be obtd. |
