fig3

Figure 3. A: Charge and discharge curves of S@CNTs-50 cathode in different electrolytes. B: Charge and discharge curves of SeS₂@PCS in different electrolytes and calculated E_ads values of different ligands by DFT. C: Schematic diagram of the structure and the working mechanism of Zn-S batteries with a redox-ion charge-carrier electrode. D: Schematic diagram of the working mechanism of a cascade battery in the discharge process. Figures reproduced with permission from Li et al.^[44], Li et al.^[25], Wu et al.^[26] and Dai et al.^[42,57]. DFT: Density functional theory.