| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Bonnet, Jean-Pierre
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2022The formulation of a CMC binder/silicon composite anode for Li-ion batteries: from molecular effects of ball milling on polymer chains to consequences on electrochemical performancescitations
- 2019CMC Binding Agent for Silicon Anodes in Li-Ion Batteries : The Impact of the Formulationcitations
- 2019Revisiting and improving the preparation of silicon-based electrodes for lithium-ion batteries: ball milling impact on poly(acrylic acid) polymer binderscitations
- 2014Calcium aluminate cement tapes - Part I: Structural and microstructural characterizations
- 2013Mechanical behavior and ultrasonic non-destructive characterization of elastic properties of cordierite-based ceramicscitations
- 2013Influence of iron on the occurrence of primary mullite in kaolin based materials: A semi-quantitative X-ray diffraction studycitations
- 2013Influence of iron onto the structural reorganization process during the sintering of kaolinscitations
- 2012Microstructural and electrical characterization of bulk YBa2Cu3O7−δ ceramicscitations
- 2012Rheological properties of montmorillonitic clay suspensions: Effect of firing and interlayer cationscitations
- 2011Highlighting of a single reaction path during reactive ball milling of Mg and TM by quantitative H2 gas sorption analysis to form ternary complex hydrides (TM = Fe, Co, Ni)citations
- 2010Preparation of Mullite- and Zircon-Based Ceramics Using Kaolinite and Zirconium Oxide: A Sintering Studycitations
- 2009Characterization for Ceramic Applications of Clay Materials from Lembo Deposit, Mount Bana (Cameroon)
- 2009Mineralogy and sintering mechanisms of a clay raw material
- 2007Main Recent Contributions to SHS from Francecitations
- 2007Silica coated nanoparticles: synthesis,magnetic properties and spin structurecitations
- 2006TiO based coatings prepared by plasma spraying in air of Ti+C mixturescitations
Places of action
| Organizations | Location | People |
|---|
article
The formulation of a CMC binder/silicon composite anode for Li-ion batteries: from molecular effects of ball milling on polymer chains to consequences on electrochemical performances
Abstract
International audience ; The semi-synthetic polysaccharide carboxymethylcellulose (CMC) is one of the most studied and effective polymer binders for silicon-based anodes in Li-ion batteries. The formulation of the corresponding composite negative electrode with an appropriate mixture of electroactive silicon, a CMC binder and a carbon additive is mandatory to ensure a good electrical conductivity. Blending is commonly realized by a highly energetic ball milling treatment of these three aforementioned components. This type of mixing reduces the size of the obtained particles and can also potentially agglomerate them. Morever, it allows the formation of a nanostructured mixture which is essential for both the silicon activation and to achieve good electrochemical performance. However, such strong treatment can also cause a significant degradation of the polymer chains, as we have recently demonstrated for polyacrylic acid (PAA). In the present work, the structural and chemical effects of this mechanical grinding on three commercial CMCs ranging from 90 to 700 kg mol−1 were investigated. All the polymers were characterized using SEC-MALLS, FTIR spectroscopy, MALDI-TOF mass spectrometry and TGA-MS thermal analysis. In all cases, a huge average molecular weight decrease was noticed, leading to the appearance of a bimodal distribution with low (52–72 kg mol−1) to very low molecular weight populations (1–1.8 kg mol−1). From these results, two formulations of a negative electrode were compared, one with ball milling of the three compounds and another one including only ball milling steps for silicon and carbon. After the correlation of the characteristics of this negative electrode composite with the electrochemical results, it was demonstrated that a high number of functions for supramolecular or covalent linkages are keypoints of the herein anode performance. Low molecular weight CMC derivatives (about 64 kg mol−1) obtained by ball milling treatment led to higher stability of the electrode.