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Reversible Electrochemical Intercalation and Deintercalation of Fluoride Ions into Host Lattices with Schafarzikite-Type Structure

Nowroozi, Mohammad Ali ; de Laune, Benjamin ; Clemens, Oliver (2018)
Reversible Electrochemical Intercalation and Deintercalation of Fluoride Ions into Host Lattices with Schafarzikite-Type Structure.
In: ChemistryOpen, 7 (8)
doi: 10.1002/open.201800106
Article, Bibliographie

Abstract

Herein, we report the successful electrochemical fluorination and defluorination of schafarzikite‐type compounds with the composition Fe0.5M0.5Sb2O4 (M=Mg or Co). We show that electrochemical methods can present a more controllable and less environmentally damaging route for fluorinating compounds in contrast to traditional methods that involve heating samples in F2‐rich atmospheres. The reactivity of the host lattices with fluoride during electrochemical fluorination makes this material an interesting candidate for fluoride‐ion battery applications. However, deleterious side reactions with the conductive carbon matrix during fluorination suggests to the contrary. Regardless of the side reactions, the schafarzikite structure was found to be an alternative reversible host lattice for fluoride incorporation and removal in addition to the previously reported Ruddlesden–Popper‐type compounds.

Item Type: Article
Erschienen: 2018
Creators: Nowroozi, Mohammad Ali ; de Laune, Benjamin ; Clemens, Oliver
Type of entry: Bibliographie
Title: Reversible Electrochemical Intercalation and Deintercalation of Fluoride Ions into Host Lattices with Schafarzikite-Type Structure
Language: English
Date: August 2018
Publisher: Wiley-VCH Verlag GmbH, Weinheim
Journal or Publication Title: ChemistryOpen
Volume of the journal: 7
Issue Number: 8
DOI: 10.1002/open.201800106
URL / URN: https://doi.org/10.1002/open.201800106
Abstract:

Herein, we report the successful electrochemical fluorination and defluorination of schafarzikite‐type compounds with the composition Fe0.5M0.5Sb2O4 (M=Mg or Co). We show that electrochemical methods can present a more controllable and less environmentally damaging route for fluorinating compounds in contrast to traditional methods that involve heating samples in F2‐rich atmospheres. The reactivity of the host lattices with fluoride during electrochemical fluorination makes this material an interesting candidate for fluoride‐ion battery applications. However, deleterious side reactions with the conductive carbon matrix during fluorination suggests to the contrary. Regardless of the side reactions, the schafarzikite structure was found to be an alternative reversible host lattice for fluoride incorporation and removal in addition to the previously reported Ruddlesden–Popper‐type compounds.

Uncontrolled Keywords: electrochemical fluorination, fluoride-ion batteries, schafarzikite type structure, topochemical reactions, X-ray diffraction
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese
Date Deposited: 11 Dec 2018 14:39
Last Modified: 11 Dec 2018 14:39
PPN:
Funders: This work was funded by the German Research Foundation (grant no CL551/2‐1)., B.d.L. acknowledges the EPSRC for financial support (EP/L014114/1)., We further acknowledge support by the German Research Foundation (DFG) and the Open Access Publishing Fund of Technische Universität Darmstadt.
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