Please explain Why the discharging time is more than charging time in some cases of GCD measurements of electrode in 3-electrode system
if you have applied same current density, the the discharge time should be either same or less compared with the charging time. If it is not such, then, there is some irreversible reaction going on on the electrode, which is undesirable. This can lead to fast degradation of the electrode. This type of behavior are generally observed in some transition metal compound or such psuedocapacitor in 3-electrode measurement. if you test the same materials in practical 2-electrode system, this erroneous behavior will not appear.
usually, the discharge time is lower than the charging time, that is why you will see the colombic efficiency is varied from 80-100%. In your case, it will be more than 100% and I haven't seen that, so far. Just repeat the exp. to get more consistent data.
why does discharge time is obviously shorter than the charge time for most of the supercapacitors? What is the phenomenon behind this?
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