fig1
Figure 1. Current issues of Li/Na-sulfur batteries. (A) Schematics of the issues faced by Li-S batteries. (B) Theoretical charging/discharging profile of Li-S battery. (C) Theoretical discharge profile of Na-S battery. (D) Schematic illustration of the redox reactions on metal anode surface. This figure is quoted with permission from Lei et al.[4], Wu et al.[18], Yu et al.[20], and Cooper et al.[23], respectively.
