Try to search the following publication:

Best practice methods for determining an electrode material’s performance for

ultracapacitors.

Meryl D. Stoller and Rodney S. Ruoff

Energy Environ. Sci., 2010, 3, 1294–1301

Although capacitance can also be calculated from cyclic voltammetry or electrochemical impedance spectroscopy, it's still widely accepted that capacitance value should be calculated from galvanostatic charge/discharge curve. Generally, the discharge curve is used for calculating the capacitance.

Hope the information helps.

Try to search the following publication:

Best practice methods for determining an electrode material’s performance for

ultracapacitors.

Meryl D. Stoller and Rodney S. Ruoff

Energy Environ. Sci., 2010, 3, 1294–1301

Although capacitance can also be calculated from cyclic voltammetry or electrochemical impedance spectroscopy, it's still widely accepted that capacitance value should be calculated from galvanostatic charge/discharge curve. Generally, the discharge curve is used for calculating the capacitance.

Hope the information helps.

If you want to see the charge /discharge in capacitors you can use basic circuits as RC and oscilloscope, this is a basic experiment in Physics Lab.

Thank you very muck Carvalho, Wee, and Pimiskern for helping me.