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Microstructural Study of MgB(2) in the LiBH(4)-MgH(2) Composite by Using TEM

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 pr...

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Autores principales: Jin, Ou, Shang, Yuanyuan, Huang, Xiaohui, Mu, Xiaoke, Szabó, Dorothée Vinga, Le, Thi Thu, Wagner, Stefan, Kübel, Christian, Pistidda, Claudio, Pundt, Astrid
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182164/
https://www.ncbi.nlm.nih.gov/pubmed/35683747
http://dx.doi.org/10.3390/nano12111893
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author Jin, Ou
Shang, Yuanyuan
Huang, Xiaohui
Mu, Xiaoke
Szabó, Dorothée Vinga
Le, Thi Thu
Wagner, Stefan
Kübel, Christian
Pistidda, Claudio
Pundt, Astrid
author_facet Jin, Ou
Shang, Yuanyuan
Huang, Xiaohui
Mu, Xiaoke
Szabó, Dorothée Vinga
Le, Thi Thu
Wagner, Stefan
Kübel, Christian
Pistidda, Claudio
Pundt, Astrid
author_sort Jin, Ou
collection PubMed
description 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 LiBH(4)-MgH(2) composite under the influence of the 3TiCl(3)·AlCl(3) additives. The formation of the MgB(2) phase, as the rate-limiting step, is emphatically studied. According to the observations, the heterogeneous nucleation of MgB(2) relies on different nucleation centers (Mg or TiB(2) and AlB(2)). The varied nucleation and growth of MgB(2) are related to the in-plane strain energy density at the interface, resulting from the atomic misfit between MgB(2) and its nucleation centers. This leads to distinct MgB(2) morphologies (bars and platelets) and different performances in the dehydrogenation kinetics of LiBH(4)-MgH(2). It was found that the formation of numerous MgB(2) 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.
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spelling pubmed-91821642022-06-10 Microstructural Study of MgB(2) in the LiBH(4)-MgH(2) 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 Nanomaterials (Basel) Article 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 LiBH(4)-MgH(2) composite under the influence of the 3TiCl(3)·AlCl(3) additives. The formation of the MgB(2) phase, as the rate-limiting step, is emphatically studied. According to the observations, the heterogeneous nucleation of MgB(2) relies on different nucleation centers (Mg or TiB(2) and AlB(2)). The varied nucleation and growth of MgB(2) are related to the in-plane strain energy density at the interface, resulting from the atomic misfit between MgB(2) and its nucleation centers. This leads to distinct MgB(2) morphologies (bars and platelets) and different performances in the dehydrogenation kinetics of LiBH(4)-MgH(2). It was found that the formation of numerous MgB(2) 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. MDPI 2022-05-31 /pmc/articles/PMC9182164/ /pubmed/35683747 http://dx.doi.org/10.3390/nano12111893 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jin, Ou
Shang, Yuanyuan
Huang, Xiaohui
Mu, Xiaoke
Szabó, Dorothée Vinga
Le, Thi Thu
Wagner, Stefan
Kübel, Christian
Pistidda, Claudio
Pundt, Astrid
Microstructural Study of MgB(2) in the LiBH(4)-MgH(2) Composite by Using TEM
title Microstructural Study of MgB(2) in the LiBH(4)-MgH(2) Composite by Using TEM
title_full Microstructural Study of MgB(2) in the LiBH(4)-MgH(2) Composite by Using TEM
title_fullStr Microstructural Study of MgB(2) in the LiBH(4)-MgH(2) Composite by Using TEM
title_full_unstemmed Microstructural Study of MgB(2) in the LiBH(4)-MgH(2) Composite by Using TEM
title_short Microstructural Study of MgB(2) in the LiBH(4)-MgH(2) Composite by Using TEM
title_sort microstructural study of mgb(2) in the libh(4)-mgh(2) composite by using tem
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9182164/
https://www.ncbi.nlm.nih.gov/pubmed/35683747
http://dx.doi.org/10.3390/nano12111893
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