Soufiane Abdelghani-Idrissi

Université Paris Sciences et Lettres

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Alexis Grimaud

Boston College

Nicolas Dubouis

Total (France)

Annie Colin

ESPCI Paris

Matej Kanduč

Jožef Stefan Institute

Benjamin Rotenberg

Réseau sur le Stockage Electrochimique de l'énergie

Chanbum Park

Ruhr University Bochum

Michaël Deschamps

Conditions Extrêmes et Matériaux Haute Température et Irradiation

Mathieu Salanne

Réseau sur le Stockage Electrochimique de l'énergie

Joachim Dzubiella

University of Freiburg

Annie Colin

ESPCI Paris

Cooperative Institutions

Centre National de la Recherche Scientifique

Université Paris Sciences et Lettres

Sorbonne Université

ESPCI Paris

Réseau sur le Stockage Electrochimique de l'énergie

École Normale Supérieure - PSL

Délégation Paris 6

Sciences et Ingénierie de la Matière Molle

Gulliver

Helmholtz-Zentrum Berlin für Materialien und Energie

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Chasing Aqueous Biphasic Systems from Simple Salts by Exploring the LiTFSI/LiCl/H₂O Phase Diagram

ACS Central Science (2019)

Nicolas Dubouis Chanbum Park Michaël Deschamps Soufiane Abdelghani-Idrissi Matej Kanduč

Aqueous biphasic systems (ABSs), in which two aqueous phases with different compositions coexist as separate liquids, were first reported more than a century ago with polymer solutions. Recent observations of ABS forming from concentrated mixtures of inorganic salts and ionic liquids raise the fundamental question of how "different" the components of such mixtures should be for a liquid-liquid phase separation to occur. Here we show that even two monovalent salts sharing a common cation (lithium) but with different anions, namely, LiCl and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), may result in the formation of ABSs over a wide range of compositions at room temperature. Using a combination of experimental techniques and molecular simulations, we analyze the coexistence diagram and the mechanism driving the phase separation, arising from the different anion sizes. The understanding and control of ABS may provide new avenues for aqueous-based battery systems.

Imide

10.1021/acscentsci.8b00955

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Citations (44)

Numerical computation of electrical potential on a gas evolving electrode.

Research Square (Research Square) (2022)

Annie Colin Soufiane Abdelghani-Idrissi

Abstract Electrochemical systems using a gas evolving electrode, such as metal-air batteries or electrolyzers, are confronted with recurrent problems related to gas production. Indeed, the production of gas at the surface of the electrodes causes a masking of the active surface which induces overvoltages and unstable electrical signals in time. We propose here numerical computations that take into account the spatial heterogeneity of the electrode and allow to account for the size distribution of the produced bubbles. We compare these computations to experiments on a Platinum-Carbon plate cell in the presence or absence of electrolyte flow. They reproduce the observed behavior and allow us to predict the stability of the signals. They are also a guide for the synthesis of efficient electrodes.

10.21203/rs.3.rs-2084817/v1

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La charge rapide d'une batterie métal-air par la maîtrise de la fluidique diphasique

Soufiane Abdelghani-Idrissi

La charge rapide des batteries metal-air represente un des verrous technologiques auquel cette technologie est confrontee. Pour repondre a cette problematique, l'electrolyte est soumis a un ecoulement pour evacuer les bulles d’oxygene sources d'affaiblissement de l'efficacite de ces batteries. L’ecoulement de l'electrolyte permet une reduction du potentiel des electrodes a degagement de gaz. L’electrode presente une surface active plus elevee, reduisant son potentiel electrique pour un courant donne. La microscopie optique met en evidence le caractere bimodal de la repartition de la taille de bulles qui tend vers une repartition monomodal lorsque le debit augmente. Ces caracterisations electrochimiques et optiques apportent les informations pour developper un modele analytique pour la prediction du comportement dynamique de ces systemes. Ce modele est complete par une simulation numerique qui met en evidence les phenomenes oscillatoires mesures a forts courants. L’optimisation energetique du procede est realisee par le choix d’un debit optimal qui concilie le gain en puissance electrique et les pertes de charges hydrauliques. La diminution des pertes par l'adaptation de la geometrie de la cellule d’ecoulement a ete abordee. La cellule a configuration triangulaire permet une double optimisation energetique. Ces cellules ont ete testees experimentalement et presentent de meilleures caracteristiques en termes d’evacuation naturelle et forcee des bulles. Une etude preliminaire et les perspectives de l’effet de l’ecoulement sur les dendrites de zinc sont presentees. L'ecoulement de l'electrolyte dans la cellule augmente le temps de court-circuit.

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Chasing Aqueous Biphasic Systems from Simple Salts by Exploring the LiTFSI

Nicolas Dubouis Chanbum Park Michaël Deschamps Soufiane Abdelghani-Idrissi Matej Kanduč

Aqueous Biphasic Systems (ABS), in which two aqueous phases with different compositions coexist as separate liquids, have first been reported over a century ago with polymer solutions. Recent observations of ABS forming from concentrated mixtures of inorganic salts and ionic liquids raise the fundamental question of how "different" the components of such mixtures should be for a liquid-liquid phase separation to occur. Here we show that even two monovalent salts sharing a common cation (lithium) but with different anions, namely LiCl and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), may result in the formation of ABSs over a wide range of compositions at room temperature. Using a combination of experimental techniques and molecular simulations, we analyze the coexistence diagram and the mechanism driving the phase separation, arising from the different anion sizes. The understanding and control of ABS may provide new avenues for aqueous-based battery systems.

10.26434/chemrxiv.7480130.v1

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Waste heat recovery using thermally responsive ionic liquids through TiO₂ nanopore and macroscopic membranes

Energy & Environmental Science (2023)

Marc Pascual Nicolas Chapuis Soufiane Abdelghani-Idrissi Marie-Caroline Jullien Alessandro Siria

Waste heat is the untapped heat produced by a thermodynamic process. It is usually released in the surrounding environment without any valorization. Entropic harvesting of phase-changing liquids across TiO 2 membrane via diffusio-osmotic transport of ions is demonstrated.

Nanopore

10.1039/d3ee00654a

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Citations (6)

The rapid charge of a metal-air battery by mastering biphasic fluidics

HAL (Le Centre pour la Communication Scientifique Directe) (2020)

Soufiane Abdelghani-Idrissi

Fluidics

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Numerical computation of electrical potential on a gas evolving electrode

Scientific Reports (2023)

Soufiane Abdelghani-Idrissi Annie Colin

Electrochemical systems using a gas evolving electrode, such as metal-air batteries or electrolyzers, are confronted with recurrent problems related to gas production. Indeed, the production of gas at the surface of the electrodes causes a masking of the active surface which induces overvoltages and unstable electrical signals in time. We propose here numerical computations that take into account the spatial heterogeneity of the electrode and allow to account for the size distribution of the produced bubbles. We compare these computations to experiments on a Platinum-Carbon plate cell in the presence or absence of electrolyte flow. They reproduce the observed behavior and allow us to predict the stability of the signals. They are also a guide for the synthesis of efficient electrodes.

10.1038/s41598-023-28592-2

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Citations (2)

Chasing Aqueous Biphasic Systems from simple salts by exploring the LiTFSI/LiCl/H2O phase diagram

Nicolas Dubouis Chanbum Park Michaël Deschamps Soufiane Abdelghani-Idrissi Matej Kanduč

<i>Aqueous Biphasic Systems (ABS), in which two aqueous phases with different compositions coexist as separate liquids, have first been reported over a century ago with polymer solutions. Recent observations of ABS forming from concentrated mixtures of inorganic salts and ionic liquids raise the fundamental question of how "different" the components of such mixtures should be for a liquid-liquid phase separation to occur. Here we show that even two monovalent salts sharing a common cation (lithium) but with different anions, namely LiCl and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), may result in the formation of ABSs over a wide range of compositions at room temperature. Using a combination of experimental techniques and molecular simulations, we analyze the coexistence diagram and the mechanism driving the phase separation, arising from the different anion sizes. The understanding and control of ABS may provide new avenues for aqueous-based battery systems. </i>

Imide

10.26434/chemrxiv.7480130

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Citations (2)

A simple electrochemical way to probe the surface area of zinc electrodeposition

Research Square (Research Square) (2023)

M Fréville Soufiane Abdelghani-Idrissi Corentin Trégouët Youcef Brahmi Annie Colin

Abstract The electrochemistry of zinc deposition is a crucial topic for the development of disruptive Zn-based energy storage technologies. As example, zinc-air battery is a promising energy-storage system in the context of energy transition: it exhibits impressive properties regarding fabrication cost, recyclability, and energy density performance. However, these systems still suffer from a low cycle life, mainly due to non-homogeneous zinc deposition (such as dendritic growth). The morphologies of deposited zinc are usually observed at the end of the battery life after the opening of the cell. They require costly equipment such as tomography. We propose in this paper an easily implementable method to probe the morphology and the effective surface area of zinc electrodes during the electrodeposition process. This method does not require the need of opening the cell and can be done directly by several electrochemical measurements between the charge phases. This in-situ characterization method allows to investigate the state of a morphology-changing electrode, and thus pave the way for controlling and regulating the morphology of deposited zinc in real-life battery applications. This outcome could lead to curative electrochemical protocols, in order to limit and prevent the short-circuit caused by non-homogeneous metallic deposition and thus extend battery life.

Deposition

Electrochemical energy storage

Electrochemical cell

Electrochemical energy conversion

10.21203/rs.3.rs-3691534/v1

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Chasing Aqueous Biphasic Systems from simple salts by exploring the LiTFSI/LiCl/H2O phase diagram

Nicolas Dubouis Chanbum Park Michaël Deschamps Soufiane Abdelghani-Idrissi Matej Kanduč

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10.26434/chemrxiv.7480130.v4

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