We can calculate the specific capacitance of a supercapacitor using C = Q /2 × (∆ V), where the Q = Total charge charge associated in the complete cycle, (Cyclic voltammogram ) V = cycling window or we can find the discharging capacitance of a supercapacitor using i× (∆t) / ∆V where the i = discharging current , ∆V = voltage difference except iR drop (Sudden drop of voltage) ∆t = time elapsed for ∆V voltage difference .
Super capacitors use electrostatic double-layer capacitance or electrochemical pseudocapacitance or a combination of both. The two electrodes form a series circuit of two individual capacitors C1 and C2. The total capacitance Ctotal is given by the formula C=C1C2/(C1+C2). Supercapacitors may have either symmetric or asymmetric electrodes. Symmetry means if C1 = C2, then Ctotal = 0.5 ⋅ C1). For asymmetric capacitors, if C1 >> C2, then Ctotal ≈ C2