Characteristics of the stoichiometric and non-stoichiometric Laves phase alloys and their hydride electrodes

Abstract The pressure-composition isotherms, lattice parameters and electrode properties of the stoichiometric and non-stoichiometric C14 Laves phase alloys with various compositions were studied in this work. The flatness of the plateau pressure of the stoichiometric alloys with vanadium was inferior; however the flatness of the non-stoichiometric alloys on adding manganese improved for the Ti 1− x Zr x Fe 0.15 Mn 0.21+ y V 0.64 Ni 1.0 ( x = 0.2–0.4, y = 0–0.4) system. The changes in the hydrogen plateau pressure and flatness of the plateau pressure were attributed to the geometric factor and affinity of environmental elements of the tetrahedral interstices hydrogen occupation. The electrode properties of all alloys studied were dependent on the hydrogen plateau pressure and flatness of the plateau pressure of the alloy.