Legierungen zum reversiblen elektrochemischen Speichern von Wasserstoff und Verfahren zur Herstellung von Elektroden und wiederaufladbaren Batterien mit diesen Legierungen.

摘要

The description relates to novel alloys with the general formula ANiy-xBx for the reversible electrochemical storage of hydrogen which contain silicon and have the following advantage over the prior art AB5 alloys: high reversible specific capacity; long cyclic useful life; metallurgically simple production; economical because they contain no cobalt; easy and rapid activation up to full capacity owing to greater nickel enrichment at the surface. Electrodes made of this alloy can directly replace the cadmium electrode in a prior art Ni/Cd cell. Voltage, construction and manufacture may be derived from Ni/Cd technology. Moreover, such an electrochemical cell has the following advantages: more stored energy in terms of both weight and volume; very high cyclic useful life; no dentrite growth; no "memory" effect; insensitivity to overcharging and total discharge; environmentally acceptable because they contain no toxic heavy metals.