Perovskite fluorides for electrochemical energy storage and conversion: structure, performance and mechanisms

In order to cope with the global energy and environmental constraints, researchers are committed to the development of efficient and clean energy storage and conversion systems. Perovskite fluoride (ABF3), as a novel kind of electrode material, has shown excellent results in recent years in the fields of nonaqueous Li/Na/K-ion storage, aqueous supercapacitors, aqueous batteries, aqueous supercabatteries, electrocatalysis and other related areas, showing promising potential in electrochemical energy storage and conversion. This paper mainly discusses the structure of perovskite fluoride to improve its electrochemical properties by means of elemental doping, morphology control, composite construction and defects modulation, etc., and it also focuses on the electrochemical reaction mechanisms in nonaqueous/aqueous charge storage or catalytic applications, and lastly makes some development suggestions based on the current research status of perovskite fluoride.