Hydrogen storage properties of non-stoichiometric Zr0.9Ti V2 melt-spun ribbons

Zhang, Yunlong; Li, Jinshan; Zhang, Tiebang; Kou, Hongchao; Hu, Rui; Xue, Xu

doi:10.1016/j.energy.2016.08.085

Cited by 26 publications

(2 citation statements)

References 38 publications

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“…However, poor activation (first hydrogenation) at ambient conditions increases the cost of these metal hydrides for commercial applications. Several approaches have been attempted to enhance the activation such as microstructural refinement [18,19] or adding other elements such as Zr [20,21]. The substitution of a small amount of transition elements such as Fe, Co, Ni, Mn or Cr could be beneficial for the first hydrogenation but usually changes the hydrogenation thermodynamics [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and First Hydrogenation Properties of Ti30V60Mn(10−x)Crx (x = 0, 3.3, 6.6, 10) + 4 wt.% Zr

Kefi

Huot

2023

Metals

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In this paper, we studied the effect of the Cr/Mn ratio on the microstructure, crystal structure and hydrogen absorption properties of the quaternary alloys of compositions Ti30V60Mn(10−x)Crx (x = 0, 3.3, 6.6 and 10) + 4 wt.% Zr. The addition of Hf instead of Zr was also investigated. We found that all alloys are single-phase BCC (Body Centred Cubic) but with regions of high concentration of Zr (or Hf). The first hydrogenation at room temperature under 2 MPa of hydrogen happens quickly without any incubation time. The Ti30V60Mn3.3Cr6.6 + 4 wt.% Zr alloy showed the fastest kinetics and highest hydrogen absorption (3.8 wt.%). For this composition, replacing Zr with Hf made the first hydrogenation slower and reduced the capacity to 3.4 wt.%. No activation was observed for the same alloy without additives. As the alloy without additives did not absorb hydrogen at all, it means that the presence of these high concentrations of Zr (or Hf) is essential for quick first hydrogenation.

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Section: Introductionmentioning

confidence: 99%

Microstructure and First Hydrogenation Properties of Ti30V60Mn(10−x)Crx (x = 0, 3.3, 6.6, 10) + 4 wt.% Zr

Kefi

Huot

2023

Metals

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“…Typically, battery anode AB2-type alloys consist of Zr and Ti on the A site together with a variable combination of transition metals, including V, Cr, Mn, Ni and Fe on the B site [6]. Up till now, the effect of various additives on hydrogen absorption-desorption and electrochemical properties of the AB2 alloys such as Titanium [7,8], Lanthanum [9], Yttrium [10,11], Cerium [12], Praseodymium [13], Neodymium [14], Nickel [15], Molybdenum [16,17], Zinc [18], Aluminum [19], Manganese [20], Vanadium [21], Iron [22,23], Silicon [24] have been extensively studied and documented in the reference publications.…”

Section: Introductionmentioning

confidence: 99%

Study of hydrogen storage and electrochemical properties of AB2-type Ti0.15Zr0.85La0.03Ni1.2Mn0.7V0.12Fe0.12 alloy

Володин

Denys

Wan

et al. 2019

Journal of Alloys and Compounds

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A C15 AB2 Laves-type Ti0.15Zr0.85La0.03Ni1.2Mn0.7V0.12Fe0.12 alloy was prepared by arc melting and annealing. Phase-structural composition, microstructure, hydrogen absorption-desorption properties, thermodynamic and electrochemical performances were characterized by X-ray diffraction, scanning electron microscopy, hydrogen absorption-desorption measurements and electrochemical characterization and were related to the use of the alloys as metal hydride battery anodes.The alloy contains a C15 FCC intermetallic compound as the main phase and a LaNi secondary phase as the minor constituent (~ 1 wt.%).During the electrochemical tests, the anode electrodes quickly, after just a few activation cycles, reached a maximum discharge capacity. This was related to the catalytic effect of the La-rich secondary phase which acted as a catalyst of hydrogen absorption-desorption.Annealing resulted in increase of the maximum discharge capacity from 345 mAh/g for the as cast alloy to 370 mAh/g. Furthermore, the annealed alloy showed a better high rate dischargeability and a higher cyclic stability. After 100 cycles with 100% DOD at discharge current density of 1 C, the discharge capacity of the annealed alloy was very high, at a level of 90 % of the initial capacity.The rates of hydrogen diffusion have been characterized by Potentiostatic Intermittent Titration Technique and Electrochemical Impedance Spectroscopy. With increasing an extent of transformation into the hydride, the H diffusion rate in the bulk of the alloy particles decreased. The maximum value of DH measured by PITT for the annealed alloy was observed for the nearly fully discharged electrode, (SOC 2 %).

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Microstructure and Hydrogen Absorption Properties of a BCC Phase Accompanied Laves Alloy

Zhang

et al. 2018

Met. Mater. Int.

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Hydrogen storage properties of non-stoichiometric Zr0.9Ti V2 melt-spun ribbons

Cited by 26 publications

References 38 publications

Microstructure and First Hydrogenation Properties of Ti30V60Mn(10−x)Crx (x = 0, 3.3, 6.6, 10) + 4 wt.% Zr

Microstructure and First Hydrogenation Properties of Ti30V60Mn(10−x)Crx (x = 0, 3.3, 6.6, 10) + 4 wt.% Zr

Study of hydrogen storage and electrochemical properties of AB2-type Ti0.15Zr0.85La0.03Ni1.2Mn0.7V0.12Fe0.12 alloy

Microstructure and Hydrogen Absorption Properties of a BCC Phase Accompanied Laves Alloy

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