Summary, Future, and Challenges of Fluoride‐Ion Batteries

Due to the limitations of lithium‐ion batteries (LIBs), there is an urgent need to explore alternative energy storage technologies. However, the high‐energy density of fluoride‐ion batteries (FIBs) has attracted widespread attention as a potential successor to LIBs. FIBs are emerging as a low‐cost, safe, and versatile energy storage solution, with a broad operating temperature range. With continuous efforts from researchers, significant progress has been made in the field of FIBs. Nevertheless, compared to traditional batteries, research on FIBs remains limited, and many challenges and unexplored avenues persist. This article elucidates the principles of FIBs, summarizes the materials for both cathodes and anodes, discusses electrolytes, and addresses existing issues. It also outlines future directions and potential applications of FIBs. As it is continued to innovate and explore, FIBs hold promise for revolutionizing energy storage technology, offering enhanced performance, safety, and sustainability.