Figure 8.

(a) CVs of the nanotube thin film supercapacitor cycled from −1 V to +1 V, (b) CVs of the nanotubes thin film supercapacitor cycled from 0 V to +1 V for 100 cycles, (c) CVs of a conventional supercapacitor made of carbon particle thin films, and (d) charge/discharge curves of the nanotube thin film supercapacitor. ([55], Copyright @ Institute of Physics)