fig4

Figure 4. SEM images of (A) Bare-Zn after 100 h at 1 mA cm^-2 and (B) Ni@Zn after 400 h at 1 mA cm^-2 and (C) Ni-0.1W@Zn after 2,000 h at 1 mA cm^-2. The laser confocal microscopy images of (D) Bare-Zn (E) Ni@Zn and (F) Ni-0.1W@Zn after plating/stripping.