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Microstructural Study of MgB₂ in the LiBH₄-MgH₂ Composite by Using TEM

Jin, Ou ; Shang, Yuanyuan ; Huang, Xiaohui ; Mu, Xiaoke ; Szabó, Dorothée Vinga ; Le, Thi Thu ; Wagner, Stefan ; Kübel, Christian ; Pistidda, Claudio ; Pundt, Astrid (2022)
Microstructural Study of MgB₂ in the LiBH₄-MgH₂ Composite by Using TEM.
In: Nanomaterials, 12 (11)
doi: 10.3390/nano12111893
Artikel, Bibliographie

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Kurzbeschreibung (Abstract)

The hampered kinetics of reactive hydride composites (RHCs) in hydrogen storage and release, which limits their use for extensive applications in hydrogen storage S1and energy conversion, can be improved using additives. However, the mechanism of the kinetic restriction and the additive effect on promoting the kinetics have remained unclear. These uncertainties are addressed by utilizing versatile transmission electron microscopy (TEM) on the LiBH₄-MgH₂ composite under the influence of the 3TiCl₃·AlCl₃ additives. The formation of the MgB₂ phase, as the rate-limiting step, is emphatically studied. According to the observations, the heterogeneous nucleation of MgB₂ relies on different nucleation centers (Mg or TiB₂ and AlB₂). The varied nucleation and growth of MgB₂ are related to the in-plane strain energy density at the interface, resulting from the atomic misfit between MgB₂ and its nucleation centers. This leads to distinct MgB₂ morphologies (bars and platelets) and different performances in the dehydrogenation kinetics of LiBH₄-MgH₂. It was found that the formation of numerous MgB₂ platelets is regarded as the origin of the kinetic improvement. Therefore, to promote dehydrogenation kinetics in comparable RHC systems for hydrogen storage, it is suggested to select additives delivering a small atomic misfit.

Typ des Eintrags: Artikel
Erschienen: 2022
Autor(en): Jin, Ou ; Shang, Yuanyuan ; Huang, Xiaohui ; Mu, Xiaoke ; Szabó, Dorothée Vinga ; Le, Thi Thu ; Wagner, Stefan ; Kübel, Christian ; Pistidda, Claudio ; Pundt, Astrid
Art des Eintrags: Bibliographie
Titel: Microstructural Study of MgB₂ in the LiBH₄-MgH₂ Composite by Using TEM
Sprache: Englisch
Publikationsjahr: 2022
Ort: Darmstadt
Verlag: MDPI
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Nanomaterials
Jahrgang/Volume einer Zeitschrift: 12
(Heft-)Nummer: 11
Kollation: 15 Seiten
DOI: 10.3390/nano12111893
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Kurzbeschreibung (Abstract):

The hampered kinetics of reactive hydride composites (RHCs) in hydrogen storage and release, which limits their use for extensive applications in hydrogen storage S1and energy conversion, can be improved using additives. However, the mechanism of the kinetic restriction and the additive effect on promoting the kinetics have remained unclear. These uncertainties are addressed by utilizing versatile transmission electron microscopy (TEM) on the LiBH₄-MgH₂ composite under the influence of the 3TiCl₃·AlCl₃ additives. The formation of the MgB₂ phase, as the rate-limiting step, is emphatically studied. According to the observations, the heterogeneous nucleation of MgB₂ relies on different nucleation centers (Mg or TiB₂ and AlB₂). The varied nucleation and growth of MgB₂ are related to the in-plane strain energy density at the interface, resulting from the atomic misfit between MgB₂ and its nucleation centers. This leads to distinct MgB₂ morphologies (bars and platelets) and different performances in the dehydrogenation kinetics of LiBH₄-MgH₂. It was found that the formation of numerous MgB₂ platelets is regarded as the origin of the kinetic improvement. Therefore, to promote dehydrogenation kinetics in comparable RHC systems for hydrogen storage, it is suggested to select additives delivering a small atomic misfit.

Freie Schlagworte: hydrogen storage, transmission electron microscopy, crystallography, reactive hydride composite, additive
Sachgruppe der Dewey Dezimalklassifikatin (DDC): 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau
600 Technik, Medizin, angewandte Wissenschaften > 660 Technische Chemie
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien
Hinterlegungsdatum: 02 Aug 2024 12:43
Letzte Änderung: 02 Aug 2024 12:43
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