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Title: | Design of v-substituted tife-based alloy for target pressure range and easy activation |
Authors: | Faisal, M Kim, J-H Cho, YW Jang, J-I Suh, J-Y Shim, J-H Lee, Y-S |
Keywords: | hydrogen storage;TiFe alloy;equilibrium pressure;activation |
Issue Date: | 25-Aug-2021 |
Publisher: | MDPI |
Citation: | Faisal, M. et al. (2021) 'Design of v-substituted tife-based alloy for target pressure range and easy activation', Materials, 14 (17), 4829, pp. 1 - 13. doi: 10.3390/ma14174829. |
Abstract: | Copyright © 2021 by the authors. Titanium iron (TiFe) alloy is a room-temperature hydrogen-storage material, and it absorbs hydrogen via a two-step process to form TiFeH and then TiFeH2. The effect of V addition in TiFe alloy was recently elucidated. The V substitution for Ti sublattice lowers P2/P1 ratio, where P1 and P2 are the equilibrium plateau pressure for TiFe/TiFeH and TiFeH/TiFeH2, respectively, and thus restricts the two-step hydrogenation within a narrow pressure range. The focus of the present investigation was to optimize the V content such that maximum usable storage capacity can be achieved for the target pressure range: 1 MPa for absorption and 0.1 MPa for desorption. The effect of V substitution at selective Ti or Fe sublattices was closely analyzed, and the alloy composition Ti46Fe47.5V6.5 displayed the best performance with ca. 1.5 wt.% of usable capacity within the target pressure range. At the same time, another issue in TiFe-based alloys, which is a difficulty in activation at room temperature, was solved by Ce addition. It was shown that 3 wt.% Ce dispersion in TiFe alloy imparted to it easy room-temperature (RT) activation properties. |
Description: | Data Availability Statement: Not applicable. |
URI: | https://bura.brunel.ac.uk/handle/2438/26877 |
DOI: | https://doi.org/10.3390/ma14174829 |
Other Identifiers: | ORCID iD: Mohammad Faisal https://orcid.org/0000-0003-3115-2296; June-Hyung Kim https://orcid.org/0000-0003-4439-2512; Jin-Yoo Suh https://orcid.org/0000-0003-3786-6652; Young-Su Lee https://orcid.org/0000-0002-3160-6633. 4829 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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