초록 ▼

A magnesium based hydrogen storage alloy powder which is useful as a hydrogen supply material for powering internal combustion engine or fuel cell vehicles. The alloy contains greater than about 85 atomic percent magnesium, about 2-8 atomic percent nickel, about 0.5-5 atomic percent aluminum and abo

A magnesium based hydrogen storage alloy powder which is useful as a hydrogen supply material for powering internal combustion engine or fuel cell vehicles. The alloy contains greater than about 85 atomic percent magnesium, about 2-8 atomic percent nickel, about 0.5-5 atomic percent aluminum and about 2-7 atomic percent rare earth metals or mixtures of rare earth metals. The rare earth elements may be Misch metal and may predominantly contain Ce and/or La. The alloy may also contain about 0.5-5 atomic percent silicon. The alloys can be modified to store more than 4 wt. % hydrogen, with a reduced hydride bond strength (i.e. about 64 kJ/mole) which allows for economic recovery of the stored hydrogen. Also, they have a plateau pressure about two times greater than pure Mg and comparable bond energies and plateau pressures to Mg.sub.2 Ni alloys, while reducing the amount of incorporated nickel by 25-30 atomic %. Also, the storage capacity of the alloy is significantly greater than the 3.6 wt. % of Mg.sub.2 Ni material.

대표청구항

[ We claim:] [1.]1. A magnesium hydrogen storage alloy, said alloy comprising at least 85 atomic percent magnesium, said alloy having a hydrogen storage capacity of at least 4 weight percent and a plateau pressure of at least 2000 Torr at 300.degree. C.

[ We claim:] [1.]1. A magnesium hydrogen storage alloy, said alloy comprising at least 85 atomic percent magnesium, said alloy having a hydrogen storage capacity of at least 4 weight percent and a plateau pressure of at least 2000 Torr at 300.degree. C.