A5030293538- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Water Systems and Optimization
- Water resources management and optimization
- Semiconductor materials and devices
- Conducting polymers and applications
- Extraction and Separation Processes
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Electrodeposition and Electroless Coatings
- Semiconductor materials and interfaces
- Adsorption and biosorption for pollutant removal
- Force Microscopy Techniques and Applications
- Smart Grid Energy Management
- Dye analysis and toxicity
- Nanomaterials for catalytic reactions
- Anodic Oxide Films and Nanostructures
- Electron and X-Ray Spectroscopy Techniques
- Silicon Nanostructures and Photoluminescence
- Corrosion Behavior and Inhibition
- Polymer Surface Interaction Studies
- Cardiac electrophysiology and arrhythmias
- Electrospun Nanofibers in Biomedical Applications
Sidi Mohamed Ben Abdellah University
2016-2024
Office Régional de Mise en Valeur Agricole de Ouarzazate
2024
Université Moulay Ismail de Meknes
2016-2018
Canadian Nautical Research Society
2017
Institut des Matériaux Jean Rouxel
2009-2017
Nantes Université
2009-2017
Laboratoire de Réactivité et Chimie des Solides
2017
Centre National de la Recherche Scientifique
2003-2016
Réseau sur le Stockage Electrochimique de l'énergie
2013-2014
Université de Picardie Jules Verne
2008-2013
Understanding the failure mechanism of silicon based negative electrodes for lithium ion batteries is essential solving problem low coulombic efficiency and capacity fading on cycling to further implement this new very energetic material in commercial cells. To reach goal, several techniques are used here: post mortem7Li MAS NMR SEM, electrochemical impedance spectroscopy (EIS) three-electrode-based analysis. 7Li analyses charged demonstrate that major part lost during charge not trapped...
A Si-based anode with improved performance can be achieved using high-energy ball-milling as a cheap and easy process to produce Si powders prepared from coarse-grained material. Ball-milled present all the advantages of nanometric powders, but not drawbacks. Milled are nanostructured micrometric agglomerates (median size ∼10 μm), made submicrometric cold-welded particles crystallite nm. The particle provides handling non-toxicity compared well four times higher tap density....
A nanosilicon-based composite electrode that can achieve more than 700 cycles at a high capacity of 960 mAh/g was prepared using aqueous processing in an acidic medium. The buffering the solution is mandatory to promote covalent bonding between Si particles and carboxymethyl cellulose (CMC) binder. latter claimed allow formation mechanically stronger contacts within addition CMC bridging carbon black particles.
A pluri-disciplinary approach and a combination of techniques are used here to finely describe the surface silicon nanoparticles as active material in negative composite electrodes for lithium batteries. Although particles is playing major role electrochemical performance, it has rarely been characterized depth. With respect infrared analysis, we propose an analytical protocol, derived from studies devoted high specific area silica samples. Three different nanometric powders studied:...
Abstract It is well known that the mechanical properties of lithium‐ion battery electrodes impact their electrochemical performance. This especially critical for Si‐based negative electrodes, which suffer from large volume changes active mass upon cycling. Here, this study presents a postprocessing treatment (called maturation) improves and stabilities silicon‐based anodes made with an acidic aqueous binder. consists storing electrode in humid atmosphere few days before drying cell assembly....
Cu foam is evaluated as a replacement for metal foil current collectors to create 3D composite electrodes with the objective produce Si‐based anodes high loadings. The are prepared by casting slurry into porosity of foam. With such design, loading and surface capacity can reach values 10 mg cm −2 mAh . Compared common 2D copper framework shows great advantage in cycle life (more than 400 cycles at Si commercial micrometric particles) power performance. thinness coating on walls favors better...
The commercialization of high-capacity Si electrodes for lithium batteries has stalled due to the inability overcome mechanical degradation and electrolyte consumption that occur as a result inherent volume expansion upon charging. Using an ionic liquid (IL) electrolyte, trimethylisobutylphosphonium bis(fluorosulfonyl)imide (P1,1,1,i4FSI) containing high (LiFSI) salt content 3.2 mol per kg IL (50 %), inexpensive made from facile ball-milling process demonstrated outstanding capacity...
The role of the physicochemical properties water-soluble polyacrylic acid (PAA) binder in electrochemical performance highly loaded silicon/graphite 50/50 wt % negative electrodes has been examined as a function neutralization degree x PAAH1–xLix at initial cycle an electrolyte not containing ethylene carbonate. Electrode processing acidic PAAH pH 2.5 leads to deep copper corrosion, resulting significant electrode cohesion and adhesion current collector surface, but strong rigidity may...
The latest advances in the stabilization of Li/Na metal battery and Li-ion cycling have highlighted importance electrode/electrolyte interface [solid electrolyte interphase (SEI)] its direct link to behavior. To understand structure properties SEI, we used combined experimental computational studies unveil how ionic liquid (IL) cation nature salt concentration impact silicon/IL interfacial formed SEI. IL is found be important control reductive decomposition that influences SEI composition...
Considerable effort has been devoted to improving the cyclability of silicon (Si) negative electrodes for lithium-ion batteries because it is a promising high specific capacity alternative graphite. In this work, electrochemical behaviour Si in two ionic liquid (IL) electrolytes, triethyl(methyl)phosphonium bis(fluorosulfonyl)imide (P1222FSI) and N-propyl-N-methylpyrrolidinium-FSI (C3mpyrFSI) with low lithium (Li) salt content investigated at 50 °C. Results highlight that higher better...
Abstract Methylene blue (MB) is a heterocyclic aromatic chemical compound used as dye in various dyeing processes. The accumulation of such an organic poses significant threat to both the environment and human health. Therefore, numerous biological, physical, processes have been established remove MB dye, with adsorption being most predominant dye-based treatment technology. In this context, aim work was evaluate properties activated carbon derived from olive pomace against methylene blue....