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
Article, Bibliographie
This is the latest version of this item.
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2022 |
| Creators: | Jin, Ou ; Shang, Yuanyuan ; Huang, Xiaohui ; Mu, Xiaoke ; Szabó, Dorothée Vinga ; Le, Thi Thu ; Wagner, Stefan ; Kübel, Christian ; Pistidda, Claudio ; Pundt, Astrid |
| Type of entry: | Bibliographie |
| Title: | Microstructural Study of MgB₂ in the LiBH₄-MgH₂ Composite by Using TEM |
| Language: | English |
| Date: | 2022 |
| Place of Publication: | Darmstadt |
| Publisher: | MDPI |
| Journal or Publication Title: | Nanomaterials |
| Volume of the journal: | 12 |
| Issue Number: | 11 |
| Collation: | 15 Seiten |
| DOI: | 10.3390/nano12111893 |
| Corresponding Links: | |
| 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. |
| Uncontrolled Keywords: | hydrogen storage, transmission electron microscopy, crystallography, reactive hydride composite, additive |
| Classification DDC: | 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering 600 Technology, medicine, applied sciences > 660 Chemical engineering |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials |
| Date Deposited: | 02 Aug 2024 12:43 |
| Last Modified: | 02 Aug 2024 12:43 |
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| Suche nach Titel in: | TUfind oder in Google |
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Microstructural Study of MgB₂ in the LiBH₄-MgH₂ Composite by Using TEM. (deposited 31 Oct 2022 14:15)
- Microstructural Study of MgB₂ in the LiBH₄-MgH₂ Composite by Using TEM. (deposited 02 Aug 2024 12:43) [Currently Displayed]
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