|Hydrogen storage properties and microstructures of Ti0.7Zr0.3(Mn1-xVx)(2) (x=0.1, 0.2, 0.3, 0.4, 0.5) alloys|
|P. Ma; E. D. Wu; W. H. Li
|Source Publication||International Journal of Hydrogen Energy
|Abstract||Hydrogen storage properties, activation performance and thermodynamics of Ti0.7Zr0.3(Mn1-xVx)(2) (x = 0.1, 0.2, 0.3, 0.4, 0.5) alloys and associated microstructures and surface chemical states were investigated by hydrogenation measurements and relevant structure and surface characterization methods. The results showed that the phase composition of the alloy changed from single C14 Laves phase (x <= 0.2) to coexistent Laves phase and V-based BCC solid solution phase with increasing V content (x >= 0.3). The V in the alloys catalyzed hydrogen dissociation and improved resistivity to oxygen poisoning, so that the alloys could be easily and quickly activated at 293 K even after being exposed in air for a long time. The hydrogen storage capacity of the alloy increased and the plateau pressure decreased with increasing V content. The x = 0.2 and 0.3 alloys exhibited the best reversible hydrogen storage capacities of above 1.8 wt% at 1 kPa-4 MPa and 293 K. The relative partial molar enthalpy vertical bar Delta H vertical bar increased but the relative partial molar entropy vertical bar Delta S vertical bar decreased with increasing V content, and deviated from the linear relationship for x = 0.4 and 0.5 alloys due to coexisted BCC phase in the alloys. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.|
; wu, erdong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [li, wuhui] henan univ sci & technol, sch mat sci & engn, luoyang 471003, peoples r china.
; wu, ed (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.
Activation Laves Phase
Laves Phase Alloys
P. Ma,E. D. Wu,W. H. Li. Hydrogen storage properties and microstructures of Ti0.7Zr0.3(Mn1-xVx)(2) (x=0.1, 0.2, 0.3, 0.4, 0.5) alloys[J]. International Journal of Hydrogen Energy,2014,39(25):13569-13575.
P. Ma,E. D. Wu,&W. H. Li.(2014).Hydrogen storage properties and microstructures of Ti0.7Zr0.3(Mn1-xVx)(2) (x=0.1, 0.2, 0.3, 0.4, 0.5) alloys.International Journal of Hydrogen Energy,39(25),13569-13575.
P. Ma,et al."Hydrogen storage properties and microstructures of Ti0.7Zr0.3(Mn1-xVx)(2) (x=0.1, 0.2, 0.3, 0.4, 0.5) alloys".International Journal of Hydrogen Energy 39.25(2014):13569-13575.
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