Article
Electrochemistry
D. Mazouzi, R. Grissa, M. Paris, Z. Karkar, L. Huet, D. Guyomard, L. Roue, T. Devic, B. Lestriez
ELECTROCHIMICA ACTA
(2019)
Article
Chemistry, Multidisciplinary
Heng Zhang, Chunmei Li, Gebrekidan Gebresilassie Eshetu, Stephane Laruelle, Sylvie Grugeon, Karim Zaghib, Christian Julien, Alain Mauger, Dominique Guyomard, Teofilo Rojo, Nuria Gisbert-Trejo, Stefano Passerini, Xuejie Huang, Zhibin Zhou, Patrik Johansson, Maria Forsyth
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Multidisciplinary
Marin Puget, Viacheslav Shcherbakov, Sergey Denisov, Philippe Moreau, Jean-Pierre Dognon, Mehran Mostafavi, Sophie Le Caer
Summary: The nature of the primary species formed in FEC depends on the amount of FEC in the solution, which will affect its performance in the electrolyte.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Physical
Jianhan Xiong, Nicolas Dupre, Philippe Moreau, Bernard Lestriez
Summary: This study successfully visualized the polymer binder in silicon-based electrodes using a specific electrolyte solvent composition and advanced microscopy techniques, laying the foundation for high-performance lithium-ion batteries for electric vehicle applications.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Analytical
Mouad Essani, Jean-Yves Mevellec, Baptiste Charbonnier, Philippe Moreau, Hilel Moussi, Pierre Weiss, Jean Le Bideau, Maxime Bayle, Bernard Humbert, Patricia Abellan
Summary: The development of instruments combining multiple characterization and imaging tools has driven advancements in material science, engineering, biology, and other related fields. This study reports the use of a cryo-FIB-SEM-mu Raman instrument to assess the accuracy of cryo-fixation methods for studying vitreous materials with high water content, providing a reliable approach to avoid imaging artifacts.
ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Chemical
Helene Roberge, Philippe Moreau, Estelle Couallier, Patricia Abellan
Summary: This study used scanning electron microscopy combined with focused ion beam to analyze the structural features determining the filtration performance of commercially available polyacrylonitrile (PAN) UF and polyethersulfone (PES) MF membranes at the nanometer scale. The results provide key information about the structural parameters of the selective layer and the percentage of blind pores, and suggest that current models are insufficient to fully describe asymmetric membranes with thin selective layers.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Lucas Huet, Philippe Moreau, Nicolas Dupre, Thomas Devic, Lionel Roue, Bernard Lestriez
Summary: The physical crosslinking of polymeric binders through coordination chemistry improves the electrochemical performance of silicon-based negative electrodes by stabilizing the electrode and the solid electrolyte interphase (SEI) layer. Scanning electron microscopy coupled with energy dispersive X-ray spectroscopy reveals the homogeneous coordination of carboxylated binder with Zn cations and its layering on the silicon surface. The SEI formed after the first cycle is denser with Zn-coordinated binder and preferentially observed on binder-depleted zones. This results in a lower SEI impedance, a higher first cycle coulombic efficiency, and a 40% improvement of capacity retention after 50 cycles for highly loaded electrodes of over 6 mAh cm(-2).
Article
Nanoscience & Nanotechnology
Angelica Laurita, Liang Zhu, Pierre-Etienne Cabelguen, Jeremie Auvergniot, Jonathan Hamon, Dominique Guyomard, Nicolas Dupre, Philippe Moreau
Summary: In this study, advanced microscopy and spectroscopy techniques were used to investigate the surface of Ni-rich layered transition metal oxides. The results demonstrate that even under usual storage conditions after synthesis, the surface of the material is chemically different from the nominal values.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yanis Levieux-Souid, Jean-Frederic Martin, Philippe Moreau, Nathalie Herlin-Boime, Sophie Le Caer
Summary: Understanding aging phenomena in batteries is crucial for designing efficient, safe, and reliable energy storage devices. This study demonstrates that radiation chemistry can be used as a valuable tool to screen the behavior of electrolytes within a few hours, yielding similar performance ratings to electrochemical cycling. Controlled irradiation can predict battery cycling behavior and propose mechanisms involved in the degradation processes of different electrolytes.
Article
Nanoscience & Nanotechnology
Lucas Huet, Driss Mazouzi, Philippe Moreau, Nicolas Dupre, Michael Paris, Sebastien Mittelette, Danielle Laurencin, Thomas Devic, Lionel Roue, Bernard Lestriez
Summary: This study proposes a simple and versatile method for preparing Zn(II)-poly(carboxylates) reticulated binders, which significantly improve the electrochemical performance of silicon-based negative electrodes. The formation of carboxylate-Zn(II) coordination bonds is investigated, and mechanical characterizations reveal better cohesion, adhesion, hardness, and elastic modulus of the coordinated binder. Operando dilatometry experiments show reduced electrode expansion and improved capacity retention of over 30% after 60 cycles for the coordinatively reticulated electrodes.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Physical
Nassima Kana, Kaouther Touidjine, Sarah Olivier-Archambaud, Effrosyni Gkaniatsou, Michael Paris, Nicolas Dupre, Nicolas Gautier, Philippe Moreau, Clemence Sicard, Bernard Lestriez, Thomas Devic
Summary: Silicon is a promising alternative to graphite for lithium-ion battery negative electrodes due to its high capacities. Coating silicon particles with metal-organic frameworks (MOFs) has shown improved electrochemical performance. However, a 20 nm thick layer of MOF on the surface of silicon particles did not result in significant modifications of the electrochemical performance in practical electrode loading conditions.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Lucas Huet, Driss Mazouzi, Philippe Moreau, Nicolas Dupre, Michael Paris, Sebastien Mittelette, Danielle Laurencin, Thomas Devic, Lionel Roue, Bernard Lestriez
Summary: This study proposes a simple and versatile method for preparing Zn(II)-poly(carboxylates) reticulated binders by adding Zn(II) precursors into a preoptimized poly(carboxylic acids) binder solution. These binders significantly improve the electrochemical performance of silicon-based negative electrodes. The formation of carboxylate-Zn(II) coordination bonds is investigated using rheology and spectroscopic techniques. Mechanical characterizations show that the coordinated binder offers better electrode coating cohesion and adhesion, as well as higher hardness and elastic modulus, even in the presence of a carbonate solvent. Operando dilatometry experiments demonstrate that the electrode expansion during lithiation is reduced, mitigating electrode mechanical failure. These coordinatively reticulated electrodes outperform their uncoordinated counterparts with an improved capacity retention of over 30% after 60 cycles.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Angelica Laurita, Liang Zhu, Pierre-Etienne Cabelguen, Jeremie Auvergniot, Dominique Guyomard, Philippe Moreau, Nicolas Dupre
Summary: Li-7 MAS NMR quantification of lithiated species reveals increased Li extraction during electrode preparation process. The study also suggests a new reaction involving Li2O as reagent and the formation of LiF in the degradation of PVdF binder.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Morgane Denis, Hubert Chevreau, Pablo Salcedo-Abraira, Philippe Moreau, Nicolas Dupre, Michael Paris, Philippe Poizot, Thomas Devic
Summary: Recently, metal-organic frameworks (MOFs) that combine organic and inorganic redox-active moieties have attracted attention in electrochemical energy storage. In this study, we focused on MIL-53(M) (M = Al, Fe) analogues based on 2,5-dioxo-1,4-benzenedicarboxylate, as this ligand has shown interesting electrochemical activity in the solid state. We attempted to chemically lithiate the title solids through various synthetic paths and characterized the resulting solids using several techniques. We found that the lithiation process differed significantly for M = Al and Fe, and evaluated the electrochemical extraction/uptake of Li+ in the lithiated derivatives. Although their storage capacities were moderate, the presence of a minor amount of M3+ cations improved the long term capacity retention.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Helene Roberge, Philippe Moreau, Estelle Couallier, Patricia Abellan
Summary: Detailed structural characterization of fouling in membranes is crucial for understanding filtration performance. Electron microscopy combined with labeling techniques can differentiate biomolecules, but specific protocols for differentiating biomolecules in fouled membranes are challenging due to the need for preserving membrane state and the inability of probes to penetrate fouled membranes. This study presents a heavy metal staining technique compatible with cryofixation to identify and differentiate biomolecules in fouling. The technique enhances contrast and reveals the strong interaction between proteins and lipids in fouling.
MICROSCOPY AND MICROANALYSIS
(2023)