fig5

Figure 5. (A) Redox couples commonly adapted in flow batteries and corresponding standard reduction potentials; (B) schematic illustration of the charging and discharging mechanisms in alkaline Zn-I₂ flow batteries; (C) specific capacity and energy density at different current densities of alkaline Zn-I₂ flow batteries^[85]. Reproduced with permission from Ref.^[85]. Copyright 2018 Royal Society of Chemistry.