M. Tsukahara et al., INFLUENCE OF VARIOUS ADDITIVES IN VANADIUM-BASED ALLOYS V3TINI0.56 ONSECONDARY PHASE-FORMATION, HYDROGEN STORAGE PROPERTIES AND ELECTRODE PROPERTIES, Journal of alloys and compounds, 245, 1996, pp. 59-65
Microstructures, hydrogen storage properties and electrode properties
of vanadium-based alloys of V(3)TiNi(0.56)M(x) (M = Al, Si, Mn, Fe, Co
, Cu, Ge, Zr, Nb, Mo, Pd, Hf and Ta; x = 0.046 and 0.24) were investig
ated in order to clarify the influences of additives, All additives, e
xcept for zirconium and hafnium, did not change the phase structure co
mposed of a vanadium-based solid solution main phase and a TiNi-based
secondary phase. A little addition of an element M with x = 0.046 to V
3TiNi0.56 did not significantly change the storage capacity, preservin
g a higher discharge capacity than 290 A h kg(-1). Further addition of
Group IVB-VIIB elements (Zr, Hf, Nb, Ta, Mo and Mn) scarcely changed
the hydrogen storage properties with x = 0.24, while the addition of G
roup VIII-IVA elements (Fe, Co, Cu, Al, Ge and Si), except for Pd, bro
ught about a decrease in the hydrogen storage capacity obtained betwee
n 3.3 and 0.01 MPa. The alloys V(3)TiNi(0.56)M(0.24) (M = Hf, Nb, Ta a
nd Pd) showed a higher discharge capacity than 330 A h kg(-1).