fig3

Figure 3. (A) Electrochemical stability window of Zn Zn symmetric cells assembled with bare Zn and CityU-42@Zn. The corresponding zoomed-in curves: (B) Low potential area and (C) High potential area. (D) Voltage profiles during initial Zn plating on the Ti foil and CityU-42@Ti at 1 mA cm-2. (E) Long-term cycling stability tests of Zn V2O5 full cells assembled with bare Zn and CityU-42@Zn.