Can an Inorganic Coating Serve as Stable SEI for Aqueous Superconcentrated Electrolytes?
In: ISSN: 2380-8195, 2021
Online
academicJournal
Zugriff:
International audience ; Developing a stable, conformal solid electrolyte interphase (SEI) for aqueous-based Li-ion batteries has been a long-awaited dream to support the development of nontoxic and eco-friendly energy storage technologies. Toward that goal, aqueous superconcentrated electrolytes were recently introduced as their unique solvation structure allows for forming a LiF-rich SEI layer at the negative electrode, imparting the stability to the interface. However, the intrinsic stability of such LiF-rich SEI was never measured, despite growing evidence of poor passivation properties and water reduction upon operation. In this work, LiF conformal layers were coated onto lithium electrodes, and their reactivity toward superconcentrated aqueous electrolytes was studied by combining solubility measurements, in situ microscopy, and gas chromatography. We demonstrate that the use of superconcentrated electrolytes drastically reduces the solubility of LiF. However, such layer is intrinsically unstable in aqueous environments, but stable in organic electrolytes, owing to the absence of self-passivation. Comparing different interfaces, we conclude that an artificial SEI made of an inorganic coating is not suitable for preventing water reactivity in aqueous systems.
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Can an Inorganic Coating Serve as Stable SEI for Aqueous Superconcentrated Electrolytes?
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Autor/in / Beteiligte Person: | Droguet, Léa ; Hobold, Gustavo ; Lagadec, Marie Francine ; Guo, Rui ; Lethien, Christophe ; Hallot, Maxime ; Fontaine, Olivier ; Tarascon, Jean-Marie ; Gallant, Betar ; Grimaud, Alexis ; Chimie du solide et de l'énergie (CSE) ; Collège de France (CdF (institution))-Institut de Chimie - CNRS Chimie (INC-CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) ; Massachusetts Institute of Technology (MIT) ; Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN) ; Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA) ; Université catholique de Lille (UCL)-Université catholique de Lille (UCL) ; Circuits Systèmes Applications des Micro-ondes - IEMN (CSAM - IEMN ) ; Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA) ; Réseau sur le stockage électrochimique de l'énergie (RS2E) ; Université de Nantes (UN)-Aix Marseille Université (AMU)-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 Montpellier (ENSCM)-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 - CNRS Chimie (INC-CNRS)-Université de Montpellier (UM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) ; Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA) ; 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 - CNRS Chimie (INC-CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) ; Collège de France - Chaire Chimie du solide et énergie ; Collège de France (CdF (institution))-Institut de Chimie - CNRS Chimie (INC-CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie - CNRS Chimie (INC-CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) ; L.D. would like to acknowledge the Direction Générale de l’Armement (DGA) for financial support. The authors would like to thank the French National Research Agency for its support through the Labex STORE-EX project (ANR-10-LABX-76-01) and through the project BALWISE (project ID: ANR-19-CE05-0014). R.G. gratefully acknowledges support from the National Science Foundation under award number 1804247. This work made use of the MRSEC Shared Experimental Facilities at MIT, supported by the National Science Foundation under award number DMR-1419807. ; Network, Renatech ; ANR-10-LABX-0076,STORE-EX,Laboratory of excellency for electrochemical energy storage(2010) ; ANR-19-CE05-0014,BALWISE,Batteries aqueuses au Li utilisant des électrolytes superconcentrés(2019) |
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Zeitschrift: | ISSN: 2380-8195, 2021 |
Veröffentlichung: | HAL CCSD ; American Chemical Society, 2021 |
Medientyp: | academicJournal |
ISBN: | 978-0-00-672746-0 (print) ; 0-00-672746-8 (print) |
DOI: | 10.1021/acsenergylett.1c01097 |
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