fig9

Figure 9. (A) Zn²⁺-Intercalated structures and relative energies; (B) TGA profiles of pristine. Discharge-charge voltage profiles at various current densities for (C) pristine cw-MnO, (D) cw-MnO₂-100, and (E) cw-MnO₂-300; This figure is reprinted (adapted) with permission from Nam et al. Copyright (2019) RSC Publishing^[101]. (F) Discharge-charge curves for the second cycle (G) differential discharge-charge capacity curves. This figure is reprinted (adapted) with permission from Liu et al. Copyright (2019) Royal Society of Chemistry^[104].