Ion Intercalation in Lanthanum Strontium Ferrite for Aqueous Electrochemical Energy Storage Devices
Source abstract
Abstract
Ion intercalation of perovskite oxides in liquid electrolytes is a very promising method for controlling their functional properties while storing charge, which opens up its potential application in different energy and information technologies. Although the role of defect chemistry in oxygen intercalation in a gaseous environment is well established, the mechanism of ion intercalation in liquid electrolytes at room temperature is poorly understood. In this study, the defect chemistry during ion intercalation of La0.5Sr0.5FeO3−δ thin films in alkaline electrolytes is studied. Oxygen and proton intercalation into the La1–xSrxFeO3−δ perovskite structure is observed at moderate electrochemical potentials (0.5 to –0.4 V), giving rise to a change in the oxidation state of Fe (as a charge compensation mechanism). The variation of the concentration of holes as a function of the intercalation potential is characterized by in situ ellipsometry, and the concentration of electron holes is indirectly quantified for different electrochemical potentials. Finally, a dilute defect chemistry model that describes the variation of defect species during ionic intercalation is developed.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced battery technologies research · Advanced Battery Materials and Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Advanced Materials for Energy Applications, Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930 Sant Adrià del Besòs, Barcelona, Spain
Department of Energy Conversion and Storage, Functional Oxides Group, Technical University of Denmark, Fysikvej 310, 233, 2800 Kongens Lyngby, Denmark
Department of Materials, Imperial College London, London SW7 2AZ, U.K.
Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
HORIBA Scientific, 14 Boulevard Thomas Gobert, Passage Jobin Yvon, CS 45002-91120 Palaiseau, France
Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia
Instituto de Ciencia de Materiales de Madrid, ICMM-CSIC, Sor Juana Ines de la Cruz 3, 28049 Madrid, Spain
ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain
Funding
Agència de Gestió d’Ajuts Universitaris i de Recerca · Horizon 2020 Framework Programme · H2020 European Research Council
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