Research / 2020 / Article / Fig 4

Research Article

Vertical Graphenes Grown on a Flexible Graphite Paper as an All-Carbon Current Collector towards Stable Li Deposition

Figure 4

Cycling performance of VG@GP and Cu foil electrodes: (a) at 1 mA cm-2 with a total capacity of 1 mAh cm-2, (b) at 3 mA cm-2 with a total capacity of 1 mAh cm-2, and (c) at 1 mA cm-2 with a total capacity of 3 mAh cm-2. (d) The voltage–capacity curves during Li nucleation at 1 mA cm-2. (e) Voltage profiles of VG@GP electrode at 1 mA cm-2 and 0.5 mAh cm-2. (f) The electrochemical impedance spectra (EIS) of the electrodes after 50 cycles. SEM images of the top surface of Li deposited after 50 and 100 cycles at a current density of 1 mA cm-2 with a total capacity of 1 mAh cm-2 on VG@GP (g) and Cu foil (h). The inset scale bar is 2.5 μm.