An effective activation method for industrially produced TiFeMn powder for hydrogen storage
Publication date
2022-06-11
Document type
Forschungsartikel
Author
Dreistadt, David Michael
Le, Thi-Thu
Capurso, Giovanni
Bellosta von Colbe, José M.
Santhosh, Archa
Pistidda, Claudio
Scharnagl, Nico
Ovri, Henry
Milanese, Chiara
Jerabek, Paul
Organisational unit
Publisher
Elsevier
Series or journal
Journal of Alloys and Compounds
ISSN
Periodical volume
919
Article ID
165847
Part of the university bibliography
✅
Language
English
Keyword
Hydrogen storage
Metal hydrides
Intermetallic compounds
Activation method
TiFe
dtec.bw
Abstract
This work proposes an effective thermal activation method with low technical effort for industrially pro duced titanium-iron-manganese powders (TiFeMn) for hydrogen storage. In this context, the influence of temperature and particle size of TiFeMn on the activation process is systematically studied. The results obtained from this investigation suggest that the activation of the TiFeMn material at temperatures as low as 50 °C is already possible, with a combination of “Dynamic” and “Static” routines, and that an increase to 90 °C strongly reduces the incubation time for activation, i.e. the incubation time of the sample with the two routines at 90 °C is about 0.84 h, while ∼ 277 h is required for the sample treated at 50 °C in both “Dynamic” and “Static” sequences. Selecting TiFeMn particles of larger size also leads to significant improvements in the activation performance of the investigated material. The proposed activation routine makes it possible to overcome the oxide layer existing on the compound surface, which acts as a diffusion barrier for the hydrogen atoms. This activation method induces further cracks and defects in the powder granules, erating new surfaces for hydrogen absorption with greater frequency, and thus leading to faster sorption kinetics in the subsequent absorption-desorption cycles.
Version
Published version
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