2017
DOI: 10.1021/acs.chemmater.6b05075
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LaSrMnO4: Reversible Electrochemical Intercalation of Fluoride Ions in the Context of Fluoride Ion Batteries

Abstract: This article reports on the investigation of LaSrMnO 4 with K 2 NiF 4 type structure for use as an intercalation based high voltage cathode material with high capacity for fluoride ion batteries (FIBs). Charging was performed against PbF 2 based anodes and shows that fluoride intercalation proceeds stepwise to form LaSrMnO 4 F and LaSrMnO 4 F 2−x . Ex-situ X-ray diffraction experiments were recorded for different cutoff voltages for a deeper understanding of the charging process, highlighting additional potent… Show more

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Cited by 127 publications
(181 citation statements)
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“…The lengths of the observed charging plateaus in region 2 exceed this capacity significantly, which can be explained from an overlap of the charging plateau with the electrochemical fluorination of the conductive additive of carbon to C−F species (the amount of carbon added can contribute to a charging capacity which is at least 10 times higher than the absolute capacity originating from the amount of the schafarzikite compounds). As found previously, this can impede the discharging (defluorination) of the target compounds, owing to the destruction of the electronic conductive matrix under formation of C−F species .…”
Section: Resultssupporting
confidence: 81%
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“…The lengths of the observed charging plateaus in region 2 exceed this capacity significantly, which can be explained from an overlap of the charging plateau with the electrochemical fluorination of the conductive additive of carbon to C−F species (the amount of carbon added can contribute to a charging capacity which is at least 10 times higher than the absolute capacity originating from the amount of the schafarzikite compounds). As found previously, this can impede the discharging (defluorination) of the target compounds, owing to the destruction of the electronic conductive matrix under formation of C−F species .…”
Section: Resultssupporting
confidence: 81%
“…As found previously, this can impede the discharging (defluorination) of the target compounds, owing to the destruction of the electronic conductive matrix under formation of C−F species . This would prohibit their use as cathode materials for reversible fluoride‐ion batteries when carbon is used as an additive for achieving electronic conductivity within the active composite. For Co 0.5 Fe 0.5 Sb 2 O 4 , the plateau region is significantly longer, which might be explained by a higher catalytic activity for the fluorination of carbon.…”
Section: Resultsmentioning
confidence: 96%
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“…Since fluorine ions are more mobile than oxygen ions [43], their reversible insertion and extraction may be realized by means of electrochemical methods [34,44]. Such methods, e.g., by using electrochemical oxidative fluorine insertion (AMnO 3−y → AMnO 3−y F y ), or reductive fluorine deintercalation (AMnO 3−y F y → AMnO 3−y ), shall open new opportunities for tuning material properties.…”
Section: Discussionmentioning
confidence: 99%