fig5

Figure 5. (A) Coulombic Efficiency comparison at 3 mA cm^-2; (B) Voltage profiles at the 50th cycle of Zn plating/stripping of V@Zn and bare Zn at 3 mA cm^-2; (C) Coulombic Efficiency comparison at 2 mA cm^-2; (D) The CV diagram tested at 0.1 mV s^-1; EIS of the Zn foil (E) and the V@Zn electrode (F) at different temperatures; (G) The calculated de-solvation activation energies of both electrodes by using the Arrhenius equation. CV: Cyclic voltammetry; EIS: Electrochemical impedance spectroscopy.