Surfactant-Assisted Synthesis of FeF 3 • 0.33 H 2 o and Its Application As Cathodic Material for Electrochemical Energy Storage Devices: From Lithium to Fluoride-Ion Batteries

作者：Federico Maria Scesa, Eugenio Gibertini, Luca Magagnin, Maurizio Sansotera · 发表于：ECS Meeting Abstracts · 年份：2023 · DOI：10.1149/ma2023-024537mtgabs · 研究领域：Inorganic Fluorides and Related Compounds

New generation of electrochemical energy storage devices is needed to face the continuous increase in energy stored capacity demand at lower costs from human society. Moreover, due to the constant increase in number of batteries produced, the development of more sustainable devices without the consumption of limited resources at affordable costs is an actual research challenge. The conventional lithium batteries, the most widespread kind of electrochemical energy storage devices, made by an intercalation cathode ( e.g. , LiCoO 2 , LiFePO 4 ) and a graphite anode suffer of limited capacity for high-performance application (such as in electric vehicles) and use limited mineral resources with adverse environmental consequences. Iron fluoride is a promising conversion cathode for positive electrodes in next-gen lithium batteries due to its low cost, great abundance, and ease of extraction 1,2 . The main problems of metal fluoride-based cathodes are the low conductivity and the structural changes during charge/discharge cycles that limit device capacity and lifespan. To effectively increase the storage capacity, several attempts to use metal lithium anodes have been made. However, this solution is now limited to primary batteries because of dendrites growth during metal plating that causes capacity fading and safety concerns. In the last decade, batteries based on fluoride-ion shuttling are drawing attention 3,4 due to the possibility to use a high-capacity conversion cathode, exp...