Figure 2

Electrochemical findings obtained for the symmetric CR2032 supercapacitor prototype containing a 1.0 M Li₂SO₄ solution: (a) voltammetric curves with different working voltage windows; (b) chronoamperometric data; (c) impedance findings (Nyquist plots); (d) galvanostatic charge–discharge curves; (e) cyclability test, and (f) Ragone Plot.