Cyclic Voltammetry, Galvan static charge-discharge, and Electrochemical Impedance spectroscopy are the three main ways to test a supercapacitor.

Test for Ultra Capacitor:

Charge the ultra-capacitor to the rated voltage with a constant current, and then keep applying the rated voltage for 30 minutes. Finally, use a constant current I to completely drain the capacitor.

ESR in Super Capacitor:

Equivalent series resistance (ESR), which is also called internal resistance, is a value that shows how much useful energy is lost in a simple electronic circuit made up of a resistor and a perfect capacitor.

Sample requirements and preparation

XRD is a non-destructive analytical technique. The outcome of XRD measurement is a Diffractogram showing:

The Structural properties:

▪️ Strain

▪️ Stress in the sample

▪️ Grain size of the sample

▪️ Identifies the orientation of a single crystal or grain


Supercapacitors are used in places like cars, buses, trains, cranes, and elevators where they are used for regenerative braking, short-term energy storage, or burst-mode power delivery. They are not used for long-term, compact energy storage.


The basic idea behind storing energy in a supercapacitor is to use the electric double-layer capacitance created when charges separate at the interface between the electrolyte and the bath solution. A supercapacitor usually works by storing electricity between two electrostatic double layers. These layers are made when thin layers of charge are deposited on the interface between the electrolyte and the inside of the capacitor electrode plates.


There are three different kinds of supercapacitors:

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