| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ravnsbæk, Dorthe Bomholdt
Aarhus University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023All-solid-state sodium-ion batteries operating at room temperature based on NASICON-type NaTi2(PO4)3 cathode and ceramic NASICON solid electrolytecitations
- 2022An Easy‐to‐Use Custom‐Built Cell for Neutron Powder Diffraction Studies of Rechargeable Batteriescitations
- 2021Synthesis and Thermal Degradation of MAl4(OH)12SO4·3H2O with M = Co2+, Ni2+, Cu2+, and Zn2+citations
- 2021Understanding disorder in oxide-based electrode materials for rechargeable batteriescitations
- 2021Synthesis and Thermal Degradation of MAl 4 (OH) 12 SO 4 ·3H 2 O with M = Co 2+ , Ni 2+ , Cu 2+ , and Zn 2+citations
- 2020The Effect of oxygen defects on the structural evolution of LiVPO4F1−yoy cathode materialscitations
- 2020On the synthesis and structure of the copper-molybdenum oxide bronzes
- 2017Synthesis, structure and properties of bimetallic sodium rare-earth (RE) borohydrides, NaRE(BH4)4, RE = Ce, Pr, Er or Gdcitations
- 2017Nanoconfined NaAlH4 Conversion Electrodes for Li Batteriescitations
- 2016Synthesis, structure and properties of new bimetallic sodium and potassium lanthanum borohydridescitations
- 2015Manganese borohydride; synthesis and characterizationcitations
- 2014A novel intermediate in the LiAlH4–LiNH2 hydrogen storage systemcitations
- 2014Hydrogen reversibility of LiBH₄-MgH₂-Al compositescitations
- 2011Novel metal boroydrides: Studies of synthesis, crystal chemistry and thermal decomposition
Places of action
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article
A novel intermediate in the LiAlH4–LiNH2 hydrogen storage system
Abstract
<p>The decomposition pathways for the composite LiAlH<sub>4</sub>-LiNH<sub>2</sub> in different ratios of (1:1), (1:1.5), (1:2) and (1:2.5) have been systematically studied using in situ synchrotron radiation powder X-ray diffraction (SR-PXD) as well as simultaneous thermogravimetric analysis and differential scanning calorimetry coupled with mass spectroscopy. The study reveals that LiAlH<sub>4</sub> decomposes in two steps to LiH, Al and H<sub>2</sub> and, subsequently, the produced LiH reacts with LiNH<sub>2</sub> forming Li<sub>2</sub>NH and H<sub>2</sub>. A new intermediate, Li<sub>4-x</sub>Al<sub>x</sub>(NH)<sub>2-2x</sub>N<sub>2x</sub>, is observed during the decomposition of LiAlH<sub>4</sub>-LiNH<sub>2</sub> (1:1.5), (1:2) and (1:2.5), formed from Li<sub>2</sub>NH and Al prior to the formation of Li<sub>3</sub>AlN<sub>2</sub>. Li<sub>4-x</sub>Al<sub>x</sub>(NH)<sub>2-2x</sub>N<sub>2x</sub> is characterized by Rietveld refinement of SR-PXD data and solid-state<sup>27</sup>Al MAS NMR spectroscopy (chemical shift, δ(Al) = 125 ppm) and both techniques reveal a maximum value for x of ∼0.10, i.e., Li<sub>3.90</sub>Al<sub>0.10</sub>(NH)<sub>1.80</sub>N<sub>0.20</sub>. The solid solution Li<sub>4-x</sub>Al<sub>x</sub>(NH)<sub>2-2x</sub>N<sub>2x</sub> crystallizes in a cubic unit cell, a = 4.9854(7) Å with space group Fm3m, similar to the crystal structure for Li<sub>2</sub>NH and is a rare type with both cation and anion disorder. For LiAlH<sub>4</sub>-LiNH<sub>2</sub> (1:1) 8.7 wt% of H<sub>2</sub> is released during heating from RT to 500°C, while for LiAlH<sub>4</sub>-LiNH<sub>2</sub> composites with molar ratios of LiNH<sub>2</sub> higher than 0.5 the release of both H<sub>2</sub> and NH<sub>3</sub> is observed.</p>