Water Plasma Functionalized CNTs/MnO₂ Composites for Supercapacitors

Figure 7

(a) Charge/discharge curves at different current densities from 1.75, 0.70, 0.52, and 0.35 mA cm⁻², as indicated by the arrow, for wpCNTs/MnO₂ (75 W, 135 Pa). (b) Galvanostatic charge/discharge cyclic stability in the 0.1–0.8 V potential.

(a)

(b)