937019.fig.003a
(a)
937019.fig.003b
(b)
937019.fig.003c
(c)
937019.fig.003d
(d)
937019.fig.003e
(e)
937019.fig.003f
(f)
Figure 3: SEM images of 3DOM Ni-Sn alloy electrode with 0.5 μm pores (a) and (b), 1.2 μm pores (c) and (d), and 3.0 μm pores (e) and (f), respectively.