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135 results on '"Dedryvère, Rémi"'

1. A fundamental correlative spectroscopic study on LixNiO2 and NaNiO2

Author

Jacquet, Quentin, Mozhzhukhina, Nataliia, Gillespie, Peter N. O., Wittmann, Gilles, Ramirez, Lucia Perez, Capone, Federico G., Rueff, Jean-Pascal, Belin, Stephanie, Dedryvère, Rémi, Stievano, Lorenzo, Matic, Aleksandar, Suard, Emmanuelle, Brookes, Nicholas B., Longo, Alessandro, Prezzi, Deborah, Lyonnard, Sandrine, and Iadecola, Antonella

Subjects
Condensed Matter - Materials Science
Abstract

The intimate correlation between the local atomic arrangement and electronic states in Li-ion battery cathode materials plays a crucial role in determining their electrochemical properties, including capacity, cycling stability, and rate capability. Despite almost 30 years of research efforts on high performance cathodes based on Ni rich layered oxides, there is still no consensus on LiNiO2 local atomic and electronic structure. Ni sites could be either Jahn-Teller distorted or bond disproportionated and the role of Ni and oxygen in the charge compensation mechanism remains unclear. In this study, we compare the local and electronic structure of LiNiO2 and NaNiO2, a long-range Jahn-Teller system, using a novel approach which aims at correlating the results from bulk spectroscopy techniques, particularly under operando conditions, obtained on standard samples to ensure sample interoperability and enhance the reliability and robustness of our results. Despite being a site-selective and local technique, XAS is unable to discriminate between the proposed scenarios, as confirmed also by theoretical calculations. On the contrary, Raman spectroscopy show local structural differences between monoclinic distorted NaNiO2 and rhombohedral LiNiO2. Additionally, HAXPES confirms the presence of multiple formal oxidation states for Ni, and RIXS data provides evidence of 3d8 states, confirming the negative charge transfer character of Ni and some degree of bond disproportionation in LiNiO2. Regarding the charge compensation mechanism, XRS and RIXS support the participation of oxygen holes in the redox activity, while Raman spectroscopy does not detect molecular oxygen. By combing several high-fidelity spectroscopy datasets, this study shows the value of correlative characterization workflows to provide insights into complex structural-electrochemical relationships.

Published
2024
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3. Unlocking anionic redox activity in O3-type sodium 3d layered oxides via Li substitution

Author

Wang, Qing, Mariyappan, Sathiya, Rousse, Gwenaëlle, Morozov, Anatolii V, Porcheron, Benjamin, Dedryvère, Rémi, Wu, Jinpeng, Yang, Wanli, Zhang, Leiting, Chakir, Mohamed, Avdeev, Maxim, Deschamps, Michaël, Yu, Young-Sang, Cabana, Jordi, Doublet, Marie-Liesse, Abakumov, Artem M, and Tarascon, Jean-Marie

Subjects
Engineering, Materials Engineering, Chemical Sciences, Physical Chemistry, Affordable and Clean Energy, Nanoscience & Nanotechnology
Abstract

Sodium ion batteries, because of their sustainability attributes, could be an attractive alternative to Li-ion technology for specific applications. However, it remains challenging to design high energy density and moisture stable Na-based positive electrodes. Here, we report an O3-type NaLi1/3Mn2/3O2 phase showing anionic redox activity, obtained through a ceramic process by carefully adjusting synthesis conditions and stoichiometry. This phase shows a sustained reversible capacity of 190 mAh g-1 that is rooted in cumulative oxygen and manganese redox processes as deduced by combined spectroscopy techniques. Unlike many other anionic redox layered oxides so far reported, O3-NaLi1/3Mn2/3O2 electrodes do not show discernible voltage fade on cycling. This finding, rationalized by density functional theory, sheds light on the role of inter- versus intralayer 3d cationic migration in ruling voltage fade in anionic redox electrodes. Another practical asset of this material stems from its moisture stability, hence facilitating its handling and electrode processing. Overall, this work offers future directions towards designing highly performing sodium electrodes for advanced Na-ion batteries.

Published
2021

5. A Fundamental Correlative Spectroscopic Study on Li1‐xNiO2 and NaNiO2.

Author

Jacquet, Quentin, Mozhzhukhina, Nataliia, Gillespie, Peter N.O., Wittmann, Gilles, Ramirez, Lucia Perez, Capone, Federico G., Rueff, Jean‐Pascal, Belin, Stephanie, Dedryvère, Rémi, Stievano, Lorenzo, Matic, Aleksandar, Suard, Emmanuelle, Brookes, Nicholas B., Longo, Alessandro, Prezzi, Deborah, Lyonnard, Sandrine, and Iadecola, Antonella

Subjects
ATOMIC structure, RAMAN spectroscopy, CHARGE transfer, OXIDATION states, SPECTROMETRY
Abstract

The intricate relationship between local atomic arrangements and electronic states significantly influences the electrochemical properties of Li‐ion battery cathode materials. Despite decades of investigation, a consensus regarding the local atomic and electronic structure of LiNiO2 remains elusive. This ambiguity stems from the potential distortion of Ni sites, either via Jahn‐Teller (JT) distortion or bond disproportionation (BD), complicating the understanding of the charge compensation mechanism involving Ni and O. This study compares the structures of LiNiO2 and NaNiO2, a JT system, using an innovative approach that integrates bulk spectroscopy techniques on standardized interoperable samples for enhanced reliability. While X‐ray absorption spectroscopy and theoretical calculations fail to differentiate between the proposed scenarios, Raman spectroscopy highlights local structural distinctions between monoclinic NaNiO2 and rhombohedral LiNiO2. HAXPES confirms various formal oxidation states for Ni, supported by RIXS data indicating 3d8 states, emphasizing negative charge transfer from Ni and some bond disproportionation in LiNiO2. Regarding charge compensation, XRS and RIXS suggest oxygen hole involvement in redox activity, whereas Raman spectroscopy does not detect molecular oxygen. This comprehensive spectroscopic analysis highlights the importance of correlative characterization workflows in elucidating complex structural‐electrochemical relationships. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Boron-Based Functional Additives Enable Solid Electrolyte Interphase Engineering in Calcium Metal Battery

Author

Bodin, Charlotte, Saboya, Juan Forero, Jankowski, Piotr, Radan, Kristian, Foix, Dominique, Courrèges, Cécile, Yousef, Ibraheem, Dedryvère, Rémi, Davoisne, Carine, Lozinšek, Matic, Ponrouch, Alexandre, Bodin, Charlotte, Saboya, Juan Forero, Jankowski, Piotr, Radan, Kristian, Foix, Dominique, Courrèges, Cécile, Yousef, Ibraheem, Dedryvère, Rémi, Davoisne, Carine, Lozinšek, Matic, and Ponrouch, Alexandre

Abstract

Calcium-metal batteries have received growing attention recently after several studies reporting successful metal plating and stripping with organic electrolytes. Given the low redox potential of metallic calcium, its surface is commonly covered by a passivation layer grown by the accumulation of electrolyte decomposition products. The presence of borate species in this layer has been shown to be a key parameter allowing for Ca2+ migration and favoring Ca electrodeposition. Here, boron-based additives are evaluated in order to tune the SEI composition, morphology, and properties. The decomposition of a BF3-based additive is studied at different potentiostatic steps and the resulting SEI layer was thoroughly characterized. SEI growth mechanism is proposed based on both experimental data and DFT calculations pointing at the formation of boron-crosslinked polymeric matrices. Several boron-based adducts are explored as SEI-forming additives for calcium-metal batteries paving the way to very rich chemistry leading to Ca2+ conducting SEI.

Published
2023

13. Boron‐Based Functional Additives Enable Solid Electrolyte Interphase Engineering in Calcium Metal Battery

Author

Bodin, Charlotte, primary, Forero Saboya, Juan, additional, Jankowski, Piotr, additional, Radan, Kristian, additional, Foix, Dominique, additional, Courrèges, Cécile, additional, Yousef, Ibraheem, additional, Dedryvère, Rémi, additional, Davoisne, Carine, additional, Lozinšek, Matic, additional, and Ponrouch, Alexandre, additional

Published
2022
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14. First 18650-format Na-ion cells aging investigation: A degradation mechanism study

Author

European Commission, LabEx STORE-EX, Région Nouvelle-Aquitaine, Agence Nationale de la Recherche (France), Ministerio de Economía y Competitividad (España), Nguyen, Long H. B., Sanz Camacho, Paula, Fondard, Jérémie, Carlier, Dany, Croguennec, Laurence, Palacín, M. Rosa, Ponrouch, Alexandre, Courrèges, Cécile, Dedryvère, Rémi, Trad, Khiem, Jordy, Christian, Genies, Sylvie, Reynier, Yvan, Simonin, Loic, European Commission, LabEx STORE-EX, Région Nouvelle-Aquitaine, Agence Nationale de la Recherche (France), Ministerio de Economía y Competitividad (España), Nguyen, Long H. B., Sanz Camacho, Paula, Fondard, Jérémie, Carlier, Dany, Croguennec, Laurence, Palacín, M. Rosa, Ponrouch, Alexandre, Courrèges, Cécile, Dedryvère, Rémi, Trad, Khiem, Jordy, Christian, Genies, Sylvie, Reynier, Yvan, and Simonin, Loic

Abstract

Several Hard carbon||Na3V2(PO4)2F3 full-cells in 18650-format are assembled to demonstrate the possible use of SIBs in stationary applications. The cell aging process is investigated in two different conditions: (i) continuous cycling at different current rates, and (ii) storage at different states-of-charge at various temperatures. The obtained results reveal that the cell degradation depends strongly on the temperature, current rates applied in cycling conditions, or state-of-charge of the storage test. Under cycling conditions, the continuous sodiation/desodiation may induce significant mechanical deformation, leading to the detachment of active materials from the current collector. Furthermore, the post-mortem analysis shows that reaction rate and aging process are not homogeneous along the electrode roll. The XRD analysis shows that Na3V2(PO4)2F3 structure is robust; nevertheless, the material cannot recover the initial Na+ content as the cycling progresses, which is the main cause for capacity loss in the positive electrode. The solid-electrolyte interphase present on the hard carbon surface was characterised using XPS. The hard carbon electrode cannot be detected during this study, evidencing the formation of a relatively thick (>5 nm) passivating layer composed of carbonate salts and NaF, which are the main products of electrolyte decomposition.

Published
2022

15. Boron-Based Functional Additives Enable Solid Electrolyte Interphase Engineering in Calcium Metal Battery

Author

European Commission, European Research Council, Ministerio de Ciencia, Innovación y Universidades (España), Agence Nationale de la Recherche (France), Slovenian Research Agency, Alistore, Wroclaw Centre for Networking and Supercomputing, Jankowski, Piotr [0000-0003-0178-8955], Ponrouch, Alexandre [0000-0002-8232-6324], Bodin, Charlotte, Forero Saboya, Juan, Jankowski, Piotr, Radan, Kristian, Foix, Dominique, Courrèges, Cécile, Yousef, Ibraheem, Dedryvère, Rémi, Davoisne, Carine, Lozinšek, Matic, Ponrouch, Alexandre, European Commission, European Research Council, Ministerio de Ciencia, Innovación y Universidades (España), Agence Nationale de la Recherche (France), Slovenian Research Agency, Alistore, Wroclaw Centre for Networking and Supercomputing, Jankowski, Piotr [0000-0003-0178-8955], Ponrouch, Alexandre [0000-0002-8232-6324], Bodin, Charlotte, Forero Saboya, Juan, Jankowski, Piotr, Radan, Kristian, Foix, Dominique, Courrèges, Cécile, Yousef, Ibraheem, Dedryvère, Rémi, Davoisne, Carine, Lozinšek, Matic, and Ponrouch, Alexandre

Abstract

Calcium-metal batteries have received growing attention recently after several studies reporting successful metal plating and stripping with organic electrolytes. Given the low redox potential of metallic calcium, its surface is commonly covered by a passivation layer grown by the accumulation of electrolyte decomposition products. The presence of borate species in this layer has been shown to be a key parameter allowing for Ca2+ migration and favoring Ca electrodeposition. Here, boron-based additives are evaluated in order to tune the SEI composition, morphology, and properties. The decomposition of a BF3-based additive is studied at different potentiostatic steps and the resulting SEI layer was thoroughly characterized. SEI growth mechanism is proposed based on both experimental data and DFT calculations pointing at the formation of boron-crosslinked polymeric matrices. Several boron-based adducts are explored as SEI-forming additives for calcium-metal batteries paving the way to very rich chemistry leading to Ca2+ conducting SEI.

Published
2022

16. First 18650-format Na-ion cells aging investigation: A degradation mechanism study

Author

Nguyen, Long H. B., Sanz Camacho, Paula, Fondard, Jérémie, Carlier, Dany, Croguennec, Laurence, Palacín, Maria Rosa, Ponrouch, Alexandre, Courreges, Cecile, Dedryvère, Rémi, Trad, Khiem, Jordy, Christian, Genies, Sylvie, Reynier, Yvan, Simonin, Loic, European Commission, LabEx STORE-EX, Région Nouvelle-Aquitaine, Agence Nationale de la Recherche (France), Ministerio de Economía y Competitividad (España), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire réactivité et chimie des solides - UMR CNRS 7314 (LRCS), Université de Picardie Jules Verne (UPJV)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Réseau sur le stockage électrochimique de l'énergie (RS2E), Aix Marseille Université (AMU)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Collège de France (CdF (institution))-Université de Picardie Jules Verne (UPJV)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA)-Nantes Université (Nantes Univ)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Université de Montpellier (UM), SAFT [Bordeaux], Société des accumulateurs fixes et de traction (SAFT), Advanced Lithium Energy Storage Systems - ALISTORE-ERI (ALISTORE-ERI), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Ciència de Materials de Barcelona (ICMAB), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), VITO/EnergyVille, Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux (LITEN), Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), The RS2E Network for the funding of LHBN's PhD thesis as well as the financial support of Région Nouvelle Aquitaine., MRP and AP acknowledge Ministerio de Economía y Competititivad (Spain) for Severo Ochoa Programme for Centres of Excellence in R&D (SEV-2015-0496)., ANR-10-LABX-0076,STORE-EX,Laboratory of excellency for electrochemical energy storage(2010), and European Project: 646433,H2020,H2020-LCE-2014-3,NAIADES(2015)

Subjects
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Batteries, [CHIM.POLY]Chemical Sciences/Polymers, Renewable Energy, Sustainability and the Environment, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Cycle-life, Cathode materials, Energy Engineering and Power Technology, [CHIM.MATE]Chemical Sciences/Material chemistry, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Solid-electrolyte interphase
Abstract

Several Hard carbon||Na3V2(PO4)2F3 full-cells in 18650-format are assembled to demonstrate the possible use of SIBs in stationary applications. The cell aging process is investigated in two different conditions: (i) continuous cycling at different current rates, and (ii) storage at different states-of-charge at various temperatures. The obtained results reveal that the cell degradation depends strongly on the temperature, current rates applied in cycling conditions, or state-of-charge of the storage test. Under cycling conditions, the continuous sodiation/desodiation may induce significant mechanical deformation, leading to the detachment of active materials from the current collector. Furthermore, the post-mortem analysis shows that reaction rate and aging process are not homogeneous along the electrode roll. The XRD analysis shows that Na3V2(PO4)2F3 structure is robust; nevertheless, the material cannot recover the initial Na+ content as the cycling progresses, which is the main cause for capacity loss in the positive electrode. The solid-electrolyte interphase present on the hard carbon surface was characterised using XPS. The hard carbon electrode cannot be detected during this study, evidencing the formation of a relatively thick (>5 nm) passivating layer composed of carbonate salts and NaF, which are the main products of electrolyte decomposition., The authors acknowledge the European Commission for funding this work through the H2020 NAIADES project (LCE10-2014, Contract number 646433). LC, DC, PSC and LHBN thank the RS2E Network for the funding of LHBN's PhD thesis as well as the financial support of Région Nouvelle Aquitaine. LC, DC, PSC, LHBN, CC, and RD acknowledge the French National Research Agency (STORE-EX Labex Project ANR-10-LABX-76-01) for financial support. MRP and AP acknowledge Ministerio de Economía y Competititivad (Spain) for Severo Ochoa Programme for Centres of Excellence in R&D (SEV-2015-0496). The authors thank E. Garitte (SAFT, France) for her helps to coordinate this project.

Published
2022
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17. Alloying electrode coatings towards better magnesium batteries

Author

Pechberty, Clément, primary, Hagopian, Arthur, additional, Ledeuil, Jean-Bernard, additional, Foix, Dominique, additional, Allouche, Joachim, additional, Chotard, Jean-Noël, additional, Lužanin, Olivera, additional, Bitenc, Jan, additional, Dominko, Robert, additional, Dedryvère, Rémi, additional, Filhol, Jean-Sébastien, additional, Stievano, Lorenzo, additional, and Berthelot, Romain, additional

Published
2022
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18. Surface Amalgam on Magnesium Electrode: Protective Coating or Not?

Author

Pechberty, Clément, Ledeuil, Jean-Bernard, Allouche, Joachim, Dedryvère, Rémi, Stievano, Lorenzo, and Berthelot, Romain

Subjects
AMALGAM electrodes, SURFACE passivation, SURFACE coatings, MAGNESIUM alloys, PROTECTIVE coatings, MAGNESIUM, LITHIUM cells
Abstract

A better control of the metal–electrolyte interface is mandatory to help the development of rechargeable magnesium batteries. Protecting the magnesium surface by a coating layer to avoid its passivation with conventional liquid electrolytes is a promising strategy. Herein, in contact with a mercury droplet, a crystalline amalgam layer is created on the surface of magnesium. After the creation of this surface coating, a remarkable improvement of the plating/stripping process is observed with magnesium bis(trifluoromethanesulfonyl)imide/dimethoxyethane electrolyte, whereas strong surface passivation hindering electrochemical cycling occurs when using bare magnesium. The detailed investigation of the evolution of the amalgam layer during cycling, however, shows substantial chemical and morphological electrochemical changes, eventually showing that such a layer does not act as a protecting coating, but rather as an independent electrode material deposited on an inert Mg substrate. [ABSTRACT FROM AUTHOR]

Published
2023
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21. Chemical Design of IrS2 Polymorphs to Understand the Charge/Discharge Asymmetry in Anionic Redox Systems

Author

Marchandier, Thomas, primary, Mariyappan, Sathiya, additional, Abakumov, Artem M., additional, Jobic, Stéphane, additional, Humbert, Bernard, additional, Mevellec, Jean-Yves, additional, Rousse, Gwenaëlle, additional, Avdeev, Maxim, additional, Dedryvère, Rémi, additional, Foix, Dominique, additional, Iadecola, Antonella, additional, Doublet, Marie-Liesse, additional, and Tarascon, Jean-Marie, additional

Published
2021
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23. Understanding the nature of the passivation layer enabling reversible calcium plating

Author

European Research Council, European Commission, Ministerio de Economía, Industria y Competitividad (España), National Research Foundation Singapore, Forero Saboya, Juan, Davoisne, Carine, Dedryvère, Rémi, Yousef, Ibraheem, Canepa, Pieremanuele, Ponrouch, Alexandre, European Research Council, European Commission, Ministerio de Economía, Industria y Competitividad (España), National Research Foundation Singapore, Forero Saboya, Juan, Davoisne, Carine, Dedryvère, Rémi, Yousef, Ibraheem, Canepa, Pieremanuele, and Ponrouch, Alexandre

Abstract

As for other multivalent systems, the interface between the calcium (Ca) metal anode and the electrolyte is of paramount importance for reversible plating/stripping. Here, we combined experimental and theoretical approaches to unveil the potential solid electrolyte interphase (SEI) components enabling facile Ca plating. Borates compounds, in the form of cross-linked polymers are suggested as divalent conducting component. A pre-passivation protocol with such SEI is demonstrated and allows to broaden the possibility for electrolyte formulation. We also demonstrated a 10-fold increase in Ca plating kinetics by tuning the cation solvation structure in the electrolyte limiting the degree of contact ion pair.

Published
2020

24. SEI Composition on Hard Carbon in Na-Ion Batteries After Long Cycling: Influence of Salts (NaPF6, NaTFSI) and Additives (FEC, DMCF)

Author

European Commission, Ministerio de Economía y Competitividad (España), Agence Nationale de la Recherche (France), Fondard, J., Irisarri, Enrique, Courrèges, Cécile, Palacín, M. Rosa, Ponrouch, Alexandre, Dedryvère, Rémi, European Commission, Ministerio de Economía y Competitividad (España), Agence Nationale de la Recherche (France), Fondard, J., Irisarri, Enrique, Courrèges, Cécile, Palacín, M. Rosa, Ponrouch, Alexandre, and Dedryvère, Rémi

Abstract

A study of the Solid Electrolyte Interphase (SEI) on hard-carbon (HC) electrodes in sodium half-cells is presented. Electrochemical performances over > 100 cycles were compared with two different salts (NaPF6, NaTFSI) and two different electrolyte additives (FEC, DMCF) in a mixture of EC and DMC solvents. The best electrochemical performances were observed with NaPF6 salt in conjunction with 3% FEC. The DMCF additive had a detrimental effect in all electrolyte combinations. The chemical characterization of the SEI was carried out by X-ray Photoelectron Spectroscopy (XPS) and showed that the best electrochemical behavior was related to an SEI composition based on sodium ethylene dicarbonate and NaF, whereas poorer electrochemical performances were associated to either low NaF or high Na2CO3 content. The results reported herein provide an insight on the SEI chemistry on hard carbon electrodes in sodium cells after long-term cycling, as a complement to previous studies dealing with the first cycles.

Published
2020

29. Scalable Route to Electroactive and Light Active Perylene Diimide Dye Polymer Binder for Lithium-Ion Batteries

Author

Ranque, Pierre, primary, George, Chandramohan, additional, Dubey, Rajeev K., additional, van der Jagt, Remco, additional, Flahaut, Delphine, additional, Dedryvère, Rémi, additional, Fehse, Marcus, additional, Kassanos, Panagiotis, additional, Jager, Wolter F., additional, Sudhölter, Ernst J. R., additional, and Kelder, Erik M., additional

Published
2020
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33. Anionic Redox Activity in a Newly Zn-Doped Sodium Layered Oxide P2-Na2/3 Mn1− y Zn y O2 (0 < y < 0.23)

Author

Bai, Xue, Sathiya, Mariyappan, Mendoza-Sanchez, Beatriz, Iadecola, Antonella, Vergnet, Jean, Dedryvère, Rémi, Saubanère, Matthieu, Abakumov, Artem, Rozier, Patrick, Tarascon, Jean‐Marie, Centre National de la Recherche Scientifique - CNRS (FRANCE), Collège de France (FRANCE), Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE), Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Institut polytechnique de Grenoble (FRANCE), Sorbonne Université (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université de Nantes (FRANCE), Université de Picardie Jules Verne (FRANCE), Université de Pau et des Pays de l'Adour - UPPA (FRANCE), Université de Haute Alsace - UHA (FRANCE), Université de Montpellier (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Chaire Chimie du solide et énergie, Chimie du solide et de l'énergie (CSE), Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), European Project: 670116,H2020,ERC-2014-ADG,ARPEMA(2015), European Project: 646433,H2020,H2020-LCE-2014-3,NAIADES(2015), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), and Collège de France - Chaire Chimie du solide et énergie

Subjects
Energie électrique, Oxygen activity, [CHIM.POLY]Chemical Sciences/Polymers, Layered oxides, Matériaux, [SPI.NRJ]Engineering Sciences [physics]/Electric power, [CHIM.MATE]Chemical Sciences/Material chemistry, Anionic redox, Na-ion batteries, Na‐ion batteries, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience; The revival of the Na‐ion battery concept has prompted intense research activities toward new sustainable Na‐based insertion compounds and their implementation in full Na‐ion cells. Efforts are parted between Na‐based polyanionic and layered compounds. For the latter, there has been a specific focus on Na‐deficient layered phases that show cationic and anionic redox activity similar to a Na0.67Mn0.72Mg0.28O2 phase. Herein, a new alkali‐deficient P2‐Na2/3Mn7/9Zn2/9O2 phase using a more electronegative element (Zn) than Mg is reported. Like its Mg counterpart, this phase shows anionic redox activity and no O2 release despite evidence of cationic migration. Density functional theory (DFT) calculations show that it is the presence of an oxygen nonbonding state that triggers the anionic redox activity in this material. The phase delivers a reversible capacity of 200 mAh g−1 in Na‐half cells with such a value be reduced to 140 mAh g−1 in full Na‐ion cells which additionally shows capacity decay upon cycling. These findings establish Na‐deficient layered oxides as a promising platform to further explore the underlying science behind O2 release in insertion compounds based on anionic redox activity.

Published
2018
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36. Revealing the Reactivity of the Iridium Trioxide Intermediate for the Oxygen Evolution Reaction in Acidic Media

Author

Pearce, Paul E., primary, Yang, Chunzhen, additional, Iadecola, Antonella, additional, Rodriguez-Carvajal, Juan, additional, Rousse, Gwenaëlle, additional, Dedryvère, Rémi, additional, Abakumov, Artem M., additional, Giaume, Domitille, additional, Deschamps, Michael, additional, Tarascon, Jean-Marie, additional, and Grimaud, Alexis, additional

Published
2019
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39. A New Cell Configuration for a More Precise Electrochemical Evaluation of an Artificial Solid‐Electrolyte Interphase.

Author

Bobnar, Jernej, Vizintin, Alen, Kapun, Gregor, Njel, Christian, Dedryvère, Rémi, Dominko, Robert, and Genorio, Bostjan

Abstract

The study of an artificial solid‐electrolyte interphase (SEI) can lead to a misinterpretation of the electrochemical results obtained with the classical cell configuration due to so‐called edge effect. A technical solution is presented here that minimizes the edge effect by using a new cell configuration with a polypropylene disc. A new cell configuration allows a simple electrochemical evaluation of an artificial SEI with a more precisely defined effective area and homogeneously distributed current density. The application of such a technical solution manifests itself through better defined deposition and stripping curves in relation to surface electrochemistry and can differ significantly from the results obtained with the classical cell configuration. Finally, a model system ‐ a lithium electrode protected with trimethylolpropane ethoxylate triacrylate polymer‐was used to evaluate and compare the new cell configuration with the classical two electrode cell configuration. [ABSTRACT FROM AUTHOR]

Published
2021
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44. Unlocking anionic redox activity in O3-type sodium 3dlayered oxides via Li substitution

Author

Wang, Qing, Mariyappan, Sathiya, Rousse, Gwenaëlle, Morozov, Anatolii V., Porcheron, Benjamin, Dedryvère, Rémi, Wu, Jinpeng, Yang, Wanli, Zhang, Leiting, Chakir, Mohamed, Avdeev, Maxim, Deschamps, Michaël, Yu, Young-Sang, Cabana, Jordi, Doublet, Marie-Liesse, Abakumov, Artem M., and Tarascon, Jean-Marie

Abstract

Sodium ion batteries, because of their sustainability attributes, could be an attractive alternative to Li-ion technology for specific applications. However, it remains challenging to design high energy density and moisture stable Na-based positive electrodes. Here, we report an O3-type NaLi1/3Mn2/3O2phase showing anionic redox activity, obtained through a ceramic process by carefully adjusting synthesis conditions and stoichiometry. This phase shows a sustained reversible capacity of 190 mAh g−1that is rooted in cumulative oxygen and manganese redox processes as deduced by combined spectroscopy techniques. Unlike many other anionic redox layered oxides so far reported, O3-NaLi1/3Mn2/3O2electrodes do not show discernible voltage fade on cycling. This finding, rationalized by density functional theory, sheds light on the role of inter- versus intralayer 3dcationic migration in ruling voltage fade in anionic redox electrodes. Another practical asset of this material stems from its moisture stability, hence facilitating its handling and electrode processing. Overall, this work offers future directions towards designing highly performing sodium electrodes for advanced Na-ion batteries.

Published
2021
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48. Anionic and Cationic Redox Processes in β-Li2IrO3and Their Structural Implications on Electrochemical Cycling in a Li-Ion Cell

Author

Pearce, Paul E., Assat, Gaurav, Iadecola, Antonella, Fauth, François, Dedryvère, Rémi, Abakumov, Artem, Rousse, Gwenaëlle, and Tarascon, Jean-Marie

Abstract

The recent discovery of anionic redox as a means to increase the energy density of transition-metal oxide positive electrodes is now a well-established approach in the Li-ion battery field. However, the science behind this new phenomenon pertaining to various Li-rich materials is still debated. Thus, it is of paramount importance to develop a robust set of analytical techniques to address this issue. Herein, we use a suite of synchrotron-based X-ray spectroscopies as well as diffraction techniques to thoroughly characterize the different redox processes taking place in a model Li-rich compound, the tridimensional hyperhoneycomb β-Li2IrO3. We clearly establish that the reversible removal of Li+from this compound is associated with a previously described reductive coupling mechanism and the formation of the M-(O–O) and M-(O–O)* states. We further show that the respective contributions to these states determine the spectroscopic response for both Ir L3-edge X-ray absorption spectroscopy and X-ray photoemission spectroscopy. Although the high covalency and the robust tridimensional structure of this compound enable a high degree of reversible delithiation, we found that pushing the limits of this charge compensation mechanism has significant effects on the local as well as average structure, leading to electrochemical instability over cycling and voltage decay. Overall, this work highlights the practical limits to which anionic redox can be exploited and sheds some light on the nature of the oxidized species formed in certain lithium-rich compounds.

Published
2020
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