| 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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Grogger, Werner
Graz University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Three-dimensional distribution of individual atoms in the channels of beryl
- 2024Three-dimensional distribution of individual atoms in the channels of berylcitations
- 2024Phase Transitions and Ion Transport in Lithium Iron Phosphate by Atomic‐Scale Analysis to Elucidate Insertion and Extraction Processes in Li‐Ion Batteriescitations
- 20232D and 3D STEM Imaging and Spectroscopy: Applications and Perspectives in View of Novel STEM Infrastructure
- 2023Phase analysis of (Li)FePO4 by selected area electron diffraction and integrated differential phase contrast imaging
- 2022Phase Analysis of (Li)FePO4 by Selected Area Electron Diffraction in Transmission Electron Microscopy
- 2022Quantifying Ordering Phenomena at the Atomic Scale in Rare Earth Oxide Ceramics via EELS Elemental Mapping
- 2022Challenges in the characterization of complex nanomaterials with analytical STEM
- 2021Spectroscopic STEM imaging in 2D and 3D
- 2018Intermetallic Compound and Void Kinetics Extraction From Resistance Evolution in Copper Pillars During Electromigration Stress Testscitations
- 2002Quantitative measurement of Cr segregation in Co0.8-xCr xPt0.1B0.1 recording media by scatter diagram analysiscitations
Places of action
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article
Phase Transitions and Ion Transport in Lithium Iron Phosphate by Atomic‐Scale Analysis to Elucidate Insertion and Extraction Processes in Li‐Ion Batteries
Abstract
<jats:title>Abstract</jats:title><jats:p>Lithium iron phosphate (LiFePO<jats:sub>4</jats:sub>, LFP) serves as a crucial active material in Li‐ion batteries due to its excellent cycle life, safety, eco‐friendliness, and high‐rate performance. Nonetheless, debates persist regarding the atomic‐level mechanisms underlying the electrochemical lithium insertion/extraction process and associated phase transitions. A profound clarity on the fundamental lithium storage mechanisms within LFP is achieved through meticulous scanning transmission electron microscopy (STEM) and selected area electron diffraction (SAED) imaging. This study shows systematical tracking of lithium ions within their respective channels and unveils the phase distribution within individual LFP crystallites not only quantitatively but also at unprecedented atomic‐level resolution. Incontrovertible evidence of the co‐existence of segregated yet only partially lithiated Li<jats:sub><jats:italic>x</jats:italic></jats:sub>FePO<jats:sub>4</jats:sub> regions in electrochemically delithiated LFP crystals are provided using correlative electron microscopic methods and data analysis. Remarkably, by directly tracing ion transport within lithium channels a diffusion coefficient range (10<jats:sup>−13</jats:sup>–10<jats:sup>−15</jats:sup> cm<jats:sup>2</jats:sup>s<jats:sup>−1</jats:sup>) for correlated lithium ion motion in LFP is estimated and Funke's ion transport jump relaxation model is validated experimentally for the first time. These findings significantly advance the understanding of olivine‐type materials, offering invaluable insights for designing superior battery materials.</jats:p>