The key role of the composition and structural features in fluoride ion conductivity in tysonite Ce1−xSrxF3−x solid solutions

Dieudonné, Belto; Chable, Johann; Body, Monique; Legein, Christophe; Durand, Etienne; Mauvy, Fabrice; Fourcade, Sébastien; Leblanc, M.; Maisonneuve, Vincent; Demourgues, Alain

doi:10.1039/c6dt04714a

Cited by 49 publications

(47 citation statements)

References 62 publications

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“…[295] This technique achieved ah igh ionic conductivity comparable to that of the single-crystal samples.T he microstructural study indicated that the F1 site (Figure 21 a) with the anion vacancies is the main contributor to fluorine mobility.T he same group used as imilar method to prepare solid solutions of the pure tysonites Sm 1Àx Ca x F 3Àx and Ce 1Àx Sr x F 3Àx ,w hich possessed the highest room-temperature ionic conductivities of 1 10 À4 and 3 10 À4 Scm À1 for the optimum compositions of Sm 0.95 Ca 0.05 F 2.95 and Ce 0.975 Sr 0.025 F 2.975 ,r espectively. [296,297] However,t heir application in the full battery is limited by their mechanical incompatibility with electrode powder materials.…”

Section: Fluoride-ion Batteriesmentioning

confidence: 99%

Halide‐Based Materials and Chemistry for Rechargeable Batteries

et al. 2020

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Rechargeable batteries are considered one of the most effective energy storage technologies to bridge the production and consumption of renewable energy. The further development of rechargeable batteries with characteristics such as high energy density, low cost, safety, and a long cycle life is required to meet the ever‐increasing energy‐storage demands. This Review highlights the progress achieved with halide‐based materials in rechargeable batteries, including the use of halide electrodes, bulk and/or surface halogen‐doping of electrodes, electrolyte design, and additives that enable fast ion shuttling and stable electrode/electrolyte interfaces, as well as realization of new battery chemistry. Battery chemistry based on monovalent cation, multivalent cation, anion, and dual‐ion transfer is covered. This Review aims to promote the understanding of halide‐based materials to stimulate further research and development in the area of high‐performance rechargeable batteries. It also offers a perspective on the exploration of new materials and systems for electrochemical energy storage.

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Section: Fluoride-ion Batteriesmentioning

confidence: 99%

Halide‐Based Materials and Chemistry for Rechargeable Batteries

et al. 2020

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“…Recently, several studies concerning various anode [20,21] and cathode materials [22] appeared; their suitability and performance have always been investigated in combination with La0.9Ba0.1F2.9 as the ceramic electrolyte of choice. To the best of our knowledge, no detailed studies concerning the electrochemical stability of solid-state fluoride electrolytes against metallic current collectors have been reported yet, neither of La0.9Ba0.1F2.9 nor of other F− conductors such as Ba0.7Sb0.3F2.3, which is not stable against Ce as anode material [23], Ce1−xSrxF3−x (0 ≤ x < 0.15) [24] or Sm1−xCaxF<...>…”

Section: Introductionmentioning

confidence: 99%

Fluoride-Ion Batteries: On the Electrochemical Stability of Nanocrystalline La0.9Ba0.1F2.9 against Metal Electrodes

et al. 2019

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Over the past years, ceramic fluorine ion conductors with high ionic conductivity have stepped into the limelight of materials research, as they may act as solid-state electrolytes in fluorine-ion batteries (FIBs). A factor of utmost importance, which has been left aside so far, is the electrochemical stability of these conductors with respect to both the voltage window and the active materials used. The compatibility with different current collector materials is important as well. In the course of this study, tysonite-type La0.9Ba0.1F2.9, which is one of the most important electrolyte in first-generation FIBs, was chosen as model substance to study its electrochemical stability against a series of metal electrodes viz. Pt, Au, Ni, Cu and Ag. To test anodic or cathodic degradation processes we carried out cyclic voltammetry (CV) measurements using a two-electrode set-up. We covered a voltage window ranging from −1 to 4 V, which is typical for FIBs, and investigated the change of the response of the CVs as a function of scan rate (2 mV/s to 0.1 V/s). It turned out that Cu is unstable in combination with La0.9Ba0.1F2.9, even before voltage was applied. The cells with Au and Pt electrodes show reactions during the CV scans; in the case of Au the irreversible changes seen in CV are accompanied by a change in color of the electrode as investigated by light microscopy. Ag and Ni electrodes seem to suffer from contact issues which, most likely, also originate from side reactions with the electrode material. The experiments show that the choice of current collectors in future FIBs will become an important topic if we are to develop long-lasting FIBs. Most likely, protecting layers between the composite electrode material and the metal current collector have to be developed to prevent any interdiffusion or electrochemical degradation processes.

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“…Die gleiche Gruppe verwendete eine ähnliche Methode, um die Sm 1− x Ca x F 3− x ‐ und Ce 1− x Sr x F 3− x ‐Tysonit‐Mischkristalle zur präparieren, welche die bei Raumtemperatur höchsten Ionenleitfähigkeiten von 1×10 −4 bzw. 3×10 −4 S cm −1 für die optimalen Zusammensetzungen von Sm 0.95 Ca 0.05 F 2.95 und Ce 0.975 Sr 0.025 F 2.975 besaßen . Allerdings ist ihre Anwendung in der aufgeladenen Batterie aufgrund ihrer mechanischen Inkompatibilität mit Elektrodenpulvermaterialien begrenzt.…”

Section: Halogenid‐ionen‐batterienunclassified

“…Aufsätze optimalen Zusammensetzungen von Sm 0.95 Ca 0.05 F 2.95 und Ce 0.975 Sr 0.025 F 2.975 besaßen. [296,297] Allerdings ist ihre Anwendung in der aufgeladenen Batterie aufgrund ihrer mechanischen Inkompatibilitätm it Elektrodenpulvermaterialien begrenzt.…”

Section: Angewandte Chemieunclassified

Halogenid‐basierte Materialien und Chemie für wiederaufladbare Batterien

et al. 2020

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Wiederaufladbare Batterien gelten als eine der effektivsten Energiespeichertechnologien, die die Überleitung zwischen der Erzeugung und dem Verbrauch erneuerbarer Energien schafft. Die weitergehende Entwicklung wiederaufladbarer Batterien mit Eigenschaften wie hohe Energiedichte, Kostengünstigkeit, Sicherheit und eine lange Lebensdauer muss dabei die stetig zunehmenden Energiespeicheranforderungen erfüllen. Dieser Aufsatz zeigt den wissenschaftlichen und technologischen Fortschritt wiederaufladbarer Batterien auf, der durch Halogenid‐basierten Materialien und Chemikalien zustande kommt, inklusive der Verwendung von Halogenid‐Elektroden, Halogendotierung von Elektroden und/oder Elektrodenoberflächen, Elektrolyt‐Design und Additive, die schnellen Ionen‐Shuttle und stabile Elektroden/Elektrolyt‐Grenzflächen ermöglichen sowie neue Batteriechemie realisieren. Eine Vielzahl von Batteriechemie basierend auf monovalentem Kation‐, multivalenten Kation‐, Anion‐ oder Dual‐Ionen‐Transfer wird beschrieben. Dieser Aufsatz zielt darauf ab, das Verständis von Halogenid‐basierten Materialien und Chemikalien zu fördern und die weitere Forschung und Entwicklung im Bereich hochleistungsfähiger wiederaufladbarer Batterien anzuregen. Er soll außerdem einen Ausblick auf die Nutzung neuer elektrochemischer Energiespeichermaterialien und ‐systeme bieten.

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The key role of the composition and structural features in fluoride ion conductivity in tysonite Ce_1−xSr_xF_3−x solid solutions

Cited by 49 publications

References 62 publications

Halide‐Based Materials and Chemistry for Rechargeable Batteries

Halide‐Based Materials and Chemistry for Rechargeable Batteries

Fluoride-Ion Batteries: On the Electrochemical Stability of Nanocrystalline La0.9Ba0.1F2.9 against Metal Electrodes

Halogenid‐basierte Materialien und Chemie für wiederaufladbare Batterien

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