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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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Drnec, Jakub
European Synchrotron Radiation Facility
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024In Situ and Operando X-ray Scattering Methods in Electrochemistry and Electrocatalysiscitations
- 2024Two-Dimensional Iridium Aerogel-Like Structures for Efficient and Stable Oxygen Evolution Reaction Activity
- 2024Monitoring the Morphological Changes of Skeleton-PtCo Electrocatalyst during PEMFC Start-Up/Shut-Downprobed by in situ WAXS and SAXScitations
- 2024Monitoring the Morphological Changes of Skeleton-PtCo Electrocatalyst during PEMFC Start-Up/Shut-Down probed by in situ WAXS and SAXS.citations
- 2023A Life-Cycle of Ni in Proton Exchange Membrane Fuel Cells
- 2023Charge Dynamics Induced by Lithiation Heterogeneity in Silicon‐Graphite Composite Anodescitations
- 2023Charge Dynamics Induced by Lithiation Heterogeneity in Silicon‐Graphite Composite Anodescitations
- 2022Operando X-Ray Diffraction Nanoimaging of Advanced Cathodes
- 2020Activation of bimetallic AgCu foam electrocatalysts for ethanol formation from CO 2 by selective Cu oxidation/reductioncitations
- 2019Small-angle scattering by supported nanoparticles: exact results and useful approximationscitations
- 2019Observing growth under confinementcitations
- 2019Surface distortion as a unifying concept and descriptor in oxygen reduction reaction electrocatalysis
- 2019Structural Disorder and Oxygen Reduction Reaction Kinetics: Friends or Foes?
- 2016Defects do Catalysis: CO Monolayer Oxidation and Oxygen Reduction Reaction on Hollow PtNi/C Nanoparticlescitations
- 2015Surface alloying upon Co intercalation between graphene and Ir(111)citations
Places of action
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article
Charge Dynamics Induced by Lithiation Heterogeneity in Silicon‐Graphite Composite Anodes
Abstract
<jats:title>Abstract</jats:title><jats:p>The reaction processes in Li‐ion batteries can be highly heterogeneous at the electrode scale, leading to local deviations in the lithium content or local degradation phenomena. To access the distribution of lithiated phases throughout a high energy density silicon‐graphite composite anode, correlative operando SAXS and WAXS tomography are applied. In‐plane and out‐of‐plane inhomogeneities are resolved during cycling at moderate rates, as well as during relaxation steps performed at open circuit voltage at given states of charge. Lithium concentration gradients in the silicon phase are formed during cycling, with regions close to the current collector being less lithiated when charging. In relaxing conditions, the multi‐phase and multi‐scale heterogeneities vanish to equilibrate the chemical potential. In particular, Li‐poor silicon regions pump lithium ions from both lithiated graphite and Li‐rich silicon regions. This charge redistribution between active materials is governed by distinct potential homogenization throughout the electrode and hysteretic behaviors. Such intrinsic concentration gradients and out‐of‐equilibrium charge dynamics, which depend on electrode and cell state of charge, must be considered to model the durability of high capacity Li‐ion batteries.</jats:p>