Do you know how to derive the capacitance from cyclic voltammetry and Galvanostatic Charge and Discharge from the first equation to the last (refer to figure)
For Cyclic voltammetry, the Ca means capacitance (or areal capacitance), Integrated i means the total volumetric charge, v is scan rate, deltaV is the operating voltage, and A is area of sample
For GCD, the Cg means the capacitance ( or areal cap), I means constant current, t is the discharge time, and the delta V is the operating voltage. In addition, why is the used formula for GCD capacitance is discharge time and not charging time???
Please include your references. :)
Dear Neil,
1. In first formula it may be specific capacitance (F/g) or areal capacitor (F/cm2) or volumetric capacitance (F/cm3) depending on in which unit you want to represent your results. Above formula is true for three electrode system.
2. In GCD formula capacitance representation are same as above . In GCD delta V equal is Operating
voltage - IR drop in GCD.
3. Supercapacitor is energy storage device, So for end users only discharge time is practically important. So practically charging time and discharge time should be same but practically this is not the case.
these video will help you out...
galvanostatic charge discharge:
https://www.youtube.com/watch?v=9r6m5JN-N20
cyclic voltammetry
https://www.youtube.com/watch?v=KtYcY_20fbE&t=186s
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