fig3

Figure 3. (A) Voltage profiles of nucleation overpotentials on different electrodes at 1 mA cm^-2. Comparison of CEs on NF, NiCoO/NF and NiCoON/NF current collectors with a fixed capacity of 1 mAh cm^-2 at (B) 1 mA cm^-2, (C) 2 mA cm^-2 and (F) 5 mA cm^-2 and (G) CE at 2 mA cm^-2 with 2 mAh cm^-2. (D, E) Corresponding discharge-charge curves on NiCoON/NF and NF at 2 mA cm^-2 with 1 mAh cm^-2. (H) Electrochemical impedance spectroscopy (EIS) after 1st cycle at 1 mA cm^-2. CE: Coulombic efficiency.