PROGRESS IN FLUORIDE ION BATTERIES (FIBs) - NEXT GENERATION ELECTROCHEMICAL STORAGE DEVICES

Fluoride ion batteries (FIBs) have emerged as the most compelling energy storage systems that are being regarded as a potential substitute to the conventional lithium-ion batteries (LIBs). Fluoride is the most electronegative and smallest sized anion with a large mobility (beneficial for charge transport) and therefore, FIBs can in theory allow for a wide electrochemical potential window. These rechargeable batteries are based on fluoride ion shuttles between the cathode and anode electrodes in the electrochemical reaction. FIBs offer high specific energy, energy density, and thermal stability. Considering the number of combinations of possible materials’ variations, they may also offer improved safety characteristics compared to Li-ion based batteries (LIBs). Not many publications exist in literature on the research regarding FIBs. To date, reported FIBs either operate with an ionic liquid, organic electrolyte or solid-state electrolyte at high temperatures. Recently in December 2018, Davis et al. from Honda, along with researchers at CalTech and NASA's Jet Propulsion Lab in California USA, published a report on new fluoride-ion batteries it is developing, in the journal Science