A5088276445- Microstructure and mechanical properties
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Aluminum Alloy Microstructure Properties
- Advanced battery technologies research
- High Temperature Alloys and Creep
- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Welding Techniques and Residual Stresses
- Integrated Circuits and Semiconductor Failure Analysis
- Metallurgy and Material Science
- Advancements in Photolithography Techniques
- Fatigue and fracture mechanics
- Microstructure and Mechanical Properties of Steels
- Additive Manufacturing Materials and Processes
- Electrical and Bioimpedance Tomography
- Metallurgy and Material Forming
- Electron and X-Ray Spectroscopy Techniques
- Advancements in Solid Oxide Fuel Cells
- Additive Manufacturing and 3D Printing Technologies
- Non-Destructive Testing Techniques
- Corrosion Behavior and Inhibition
- Mineral Processing and Grinding
Forschungszentrum Jülich
2017-2024
RWTH Aachen University
2024
Imperial College London
2024
Dyson (United Kingdom)
2024
Delft University of Technology
2024
Ernst Ruska Centre
2022
Mines Saint-Étienne
2010-2014
Centre National de la Recherche Scientifique
2013-2014
Max-Planck-Institut für Nachhaltige Materialien
2007-2011
Centre des Matériaux
2010-2011
The up-to-date lifespan of zero-excess lithium (Li) metal batteries is limited to a few dozen cycles due irreversible Li-ion loss caused by interfacial reactions during cycling. Herein, chemical prelithiated composite interlayer, made lithiophilic silver (Ag) and lithiophobic copper (Cu) in 3D porous carbon fiber matrix, applied on planar Cu current collector regulate Li plating stripping prevent undesired reactions. Li-rich surface coating oxide (Li2O), carboxylate (RCO2Li), carbonates...
In situ transmission electron microscopy (TEM) research has enabled better understanding of various battery chemistries (Li-ion, Li–S, metal–O2, Li, and Na metal based, etc.), which fueled substantial developments in technologies. this review, we highlight some the recent shedding new light on materials electrochemistry via TEM. Studying electrode processes depending type electrolytes used nature electrode–electrolyte interfaces established upon cycling conditions is key to further adoption...
Abstract High energy density electrochemical systems such as metal batteries suffer from uncontrollable dendrite growth on cycling, which can severely compromise battery safety and longevity. This originates the thermodynamic preference of nucleation electrode surfaces, where obtaining crucial information deposits in terms crystal orientation, plated volume, rate is very challenging. In situ liquid phase transmission electron microscopy (LPTEM) a promising technique to visualize understand...
High interfacial resistance and unstable interphase between cathode active materials (CAMs) solid-state electrolytes (SSEs) in the composite are two of main challenges current all-solid-state batteries (ASSBs). In this work, all-phosphate-based LiFePO4 (LFP) Li1.3 Al0.3 Ti1.7 (PO4 )3 (LATP) is obtained by a co-firing technique. Benefiting from densified structure formed redox-active Li3-x Fe2-x-y Tix Aly (LFTAP) interphase, mixed ion- electron-conductive LFP/LATP facilitates stable operation...
A new reconstruction method, coined MIRAGE, is presented for accurate, fast, and robust parameter mapping of multiple-echo gradient-echo (MEGE) imaging, the basis sequence novel quantitative magnetic resonance imaging techniques such as water content susceptibility mapping. Assuming that temporal signal can be modeled a sum damped complex exponentials, MIRAGE performs model-based undersampled data by minimizing rank local Hankel matrices. It further incorporates multi-channel information...
Abstract The influence of ethylenediaminetetraacetic acid (EDTA) electrolyte additive on the performance Zn−air batteries with near‐neutral chloride‐based electrolytes was examined for primary and secondary batteries. electrochemical measurements indicated that Zn is not completely active in neat 2 M NaCl, but still could be discharged up to 1 mA cm −2 around −1.0 V Ag/AgCl . characterization surfaces revealed existence a passive film consisting Simonkolleite, Zn(OH) , and/or ZnO. EDTA...
Abstract Aiming to advance the technical maturity of CO 2 electrolysis formic acid, various gas diffusion layers (GDLs) are investigated for their suitability as carbon‐based substrate electrodes (GDEs) and effect on electroreduction formate. Particular attention lies elucidation GDL thickness, hydrophobic treatment, presence a microporous layer (MPL) GDE performance in terms Faradaic efficiency. Based investigation it is found that thickness has no discernible influence efficiency, while...
A robust imaging protocol utilizing laboratory XCT is presented. Hybrid 2D/3D at different scales with real-time monitoring allowed to assess, in operation, the evolution of zinc electrodes within three environments, namely alkaline, near-neutral, and mildly acidic. Different combinations currents were used demonstrate various scenarios exhibiting both dendritic smooth deposition active material. Directly from radiograms, volume electrode therefore its growth/dissolution rate was estimated...
A new multivalent metal–air battery employing Titanium (Ti) as active material in EMIm(HF)2.3F room temperature ionic liquid electrolyte is introduced. Ti metal highly attractive it a light that can possibly transfer up to 4 electrons. The electrochemical behavior of known for its passivity various media. Here, we evaluated the electrochemistry with potentiodynamic polarization and galvanostatic discharge experiments. Ti–air could successfully be operated under relatively high current...
<title>Abstract</title> Proton exchange membrane electrolysis cells (PEMEC) are a key technology for producing “green hydrogen” – sustainable energy carrier and platform synthesizing manifold chemicals. To bolster performance durability of PEMEC accelerate market ramp-up green hydrogen economy, this study aims to elucidate operation-induced changes in an cell operated under realistic conditions over 5,000 hours. This investigation has uncovered new systematic aging phenomenon current...
The three-dimensional granular and damage structure of two creep deformed copper specimens has been reconstructed using an improved serial sectioning method combining optical profilometry, scanning electron imaging backscatter diffraction. reconstructions permitted associating voids to grain boundaries evaluating the probability each boundary type. results indicate that oxygen free high conductivity is governed by topological factors. Quadruple/grain have highest followed two- three-grain...
Solid-state sintering at high temperatures is commonly used to densify solid electrolytes. Yet, optimizing phase purity, structure, and grain sizes of electrolytes challenging due the lack understanding relevant processes during sintering. Here, we use an in situ environmental scanning electron microscopy (ESEM) monitor behavior NASICON-type Li1.3Al0.3Ti1.7(PO4)3 (LATP) low pressures. Our results show that while no major morphological changes are observed 10-2 Pa only coarsening induced 10...
Alterations in the substantia nigra are strongly associated with Parkinson’s disease. However, due to low contrast and partial volume effects present typical MRI images, is not of sufficient size obtain a reliable segmentation for region-of-interest based analysis. To combat this problem, approach proposed here offers method investigate reveal changes quantitative parameters vicinity without any priori delineation. This uses an alternative statistical, voxel-based analysis maps was tested on...
Conformal coating of silicon (Si) anode particles is a common strategy for improving their mechanical integrity, to mitigate battery capacity fading due particle volume expansion, which can result in crumbling lithiation induced strain and excessive solid-electrolyte interface formation. Here, we use operando transmission electron microscopy an open cell show that TiO2 coatings on Si/SiO2 undergo thickness dependent rupture cycling where thicker crumble more readily than thinner (∼5 nm)...
Proton exchange membrane electrolytic cell (PEMEC) is a key technology in the production of sustainable “green” hydrogen. In such systems, as an electrolyte and physical barrier, proton (PEM) applied [1]. Overall, performance PEMEC depends on many factors, catalyst material its loading, thickness electrodes interface roughness for example. While studies have reported changes PEM microstructures, even operando [2], there still limited data regarding process heterogeneity large...
An experimental and numerical tomographic study on the influence of lateral beam coherence limited detector resolution size voids in copper is presented. Several scans same sample were performed at ID15A ESRF under pink conditions different sample-detector distances. The images segmented using a gradient based method then appearing subsequent volumes identified through image-correlation. It was found that void smaller short distances, but it saturates values about 160–200 mm. Simulations...