The Capacitive Behaviors of Manganese Dioxide Thin-Film Electrochemical Capacitor Prototypes

Figure 10

(a) Cyclic voltammograms in different Na₂SO₄ electrolyte concentration at a scan rate of 50 mV/s, (b) specific capacitance (F/g) of the MnO₂ EC prototypes at different electrolyte concentration, [Na₂SO₄], and cation activity, pNa_a.

(a)

(b)