Advances in K-Q (Q = S, Se and Se S ) batteries

Metal-sulfur batteries are advanced energy storage systems featuring intriguingly high theoretical capacity and high energy density. Spurred on by the failures in commercializing Li-S and Na-S batteries, K-Q (Q = S, Se, and SexSy) batteries have entered the sights of researchers because of the low redox potential and natural abundance of element K and its synergistic reaction with S or Se. Unfortunately, the current K-Q battery still suffers...