INFLUENCE OF VARIOUS ADDITIVES IN VANADIUM-BASED ALLOYS V3TINI0.56 ONSECONDARY PHASE-FORMATION, HYDROGEN STORAGE PROPERTIES AND ELECTRODE PROPERTIES

Citation
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
Citations number
14
Categorie Soggetti
Chemistry Physical","Metallurgy & Metallurigical Engineering","Material Science
ISSN journal
09258388
Volume
245
Year of publication
1996
Pages
59 - 65
Database
ISI
SICI code
0925-8388(1996)245:<59:IOVAIV>2.0.ZU;2-G
Abstract
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).