WO₃ Nanowires on Graphene Sheets as Negative Electrode for Supercapacitors

Figure 5

SEM images of WO₃ films prepared from different process: (a) with no graphene sheets on graphite foil; (b) with no WO₃ seeding; and (c) with no NaCl in the hydrothermal solution; (d) CVs of WO₃ electrodes prepared from different process.

(a)

(b)

(c)

(d)