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ELECTROCHEMISTRY TESTS

 

Cyclic Voltammetry and Galvanostatic Charging are tests used throughout the industrial and scientific communities to study chemical reactions and behavior of electronic structures.  They are extremely helpful in the monitoring of nano based dielectrics, used in super / ultra capacitors or self-assembled monolayers (SAMs).

The Cyclic Voltammetry test applies a ramping voltage to a device and measures the resulting current.  In a capacitor-like structure the current reveals loss in the dielectric as well as degradation over time.  Cyclic Voltammetry is used to characterize the performance of supercapacitors and ultracapacitors formed using various nano-technologies.  It is also useful in the studies of self-assembled monolayers used for sensors.

Capacitance-Voltage plot for Cyclic Voltammetry test of a good capacitor

 

Current-Voltage plot for Cyclic Voltammetry test of a good capacitor

 

The Galvanostatic Charging test applies a train of charging and discharging currents to a device and monitors the resulting voltage.  In capacitor-like structures dielectric behavior can be studied.  In batteries and chemical cells, the efficiency of differing anode, cathode, and electrolyte materials can be evaluated.

Voltage-Time plot showing three cycles of a Galvanostatic Charging and Discharging test.

 

 

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