| 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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Wagner, R.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Relation of nonmetallic inclusions to the cyclic properties of steel 42CrMo4 after steel melt cleaning by filtration and related processescitations
- 2024Nanoscale rheology: dynamic mechanical analysis over a broad and continuous frequency range using photothermal actuation atomic force microscopycitations
- 2023Combined steel melt filtration through reactive and active filterscitations
- 2022Material evaluation for engineering a novel crucible setup for the growth of oxygen free Czochralski silicon crystalscitations
- 2022Nanoindentation of alumina and multiphase inclusions in 42CrMo4 steelcitations
- 2021Direct tuning of the microstructural and mechanical properties of high-alloy austenitic steel by electron beam meltingcitations
- 2021Impact of melt conditioning and filtration on iron-rich β phase in AlSi9Cu3 and its fatigue life studied by μCTcitations
- 2020Solvent-free simultaneous extraction of volatile and non-volatile antioxidants from rosemary (Rosmarinus officinalis L.) by microwave hydrodiffusion and gravitycitations
- 2020Microstructural and mechanical characterization of high-alloy quenching and partitioning TRIP steel manufactured by electron beam meltingcitations
- 2020Effect of Compositional Variation Induced by EBM Processing on Deformation Behavior and Phase Stability of Austenitic Cr-Mn-Ni TRIP Steelcitations
- 2020Abundance of Fe(III) during cultivation affects the microbiologically influenced corrosion (MIC) behaviour of iron reducing bacteria Shewanella putrefacienscitations
- 2019Proton Bulk Diffusion in Cubic Li7La3Zr2O12 Garnets as Probed by Single X-ray Diffractioncitations
Places of action
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article
Proton Bulk Diffusion in Cubic Li7La3Zr2O12 Garnets as Probed by Single X-ray Diffraction
Abstract
<p>Ceramic electrolytes, characterized by a very high ionic conductivity as it is the case for Al-stabilized cubic Li<sub>7</sub> La<sub>3</sub> Zr<sub>2</sub> O<sub>12</sub> (Al:LLZO), are of utmost interest to develop next-generation batteries that can efficiently store electrical energy from renewable sources. If envisaged not as a solid electrolyte but as a protecting layer in lithium-metal batteries with liquid electrolytes, the ceramic should allow Li<sup>+</sup> to pass through but block out other species such as H<sup>+</sup> . Protons, for example, originating from the decomposition of electrolyte solvent molecules, will form detrimental LiH that severely affects the performance and lifetime of such batteries. Although Li-ion dynamics in Al:LLZO has been the topic of many studies, until today, little information is available about macroscopic proton diffusion in LLZO. Here, we used single-crystal X-ray diffraction to study the Li<sup>+</sup> /H<sup>+</sup> exchange rate in AL:LLZO over a period of about 3 years. Rietveld refinements reveal that H solely exchanges on the 96h site. The Li/H portion significantly changes from the anhydrous pristine sample to Li<sub>4.21</sub> :H<sub>0.66</sub> after 17 days of altering in humid air and finally to Li<sub>2.55</sub> :H<sub>2.32</sub> after 960 days. Considering the change of the Li/H portion and the probing depth of X-rays into Al:LLZO, we applied a spherical diffusion model to estimate the proton diffusion coefficient of D<sub>0</sub> ≠10<sup>-17</sup> m<sup>2</sup> s<sup>-1</sup> . Such a proton diffusion coefficient value is sufficiently high to have significant impact on cell performance and safety if Al:LLZO is going to be used to protect the Li-metal anode from reaction with the liquid electrolyte. In particular, during Li plating, such a high H<sup>+</sup> penetration rate may accelerate the formation of LiH, giving rise to safety problems of these types of batteries.</p>