Chronopotentiometry

Chronopotentiometry applies a constant current through the device under test (DUT). During this galvanostatic polarization, the potential is measured over time at a defined sampling rate. A maximum measurement time (t_max) is defined for the chronopotentiometry to ensure the measurement is deterministic.

After a holding time (t_hold), the chronopotentiometry can be terminated early when a defined voltage stability state is reached or a voltage limit E_min/E_max is exceeded.

Parameter Description

Parameter	Name	Description	Unit
I dc	DC current	constant polarization current	A
t max	runtime	maximum runtime of the chronopotentiometry	s
ODR	output data rate	number of measurement points per second note: the current is always measured at the maximum possible speed and integrated for the selected data rate	\(\frac{1}{s}\)
Stability	\(\frac{|∆E|}{∆t}\)	voltage stabilization criterion for early termination of the CP	\(\frac{V}{s}\)
t hold	hold time	time window from the start of the CP in which the termination criterion do not yet apply (minimum runtime)	s
E min	min potential	minimum potential limit for premature determination	V
E max	max potential	maximum potential limit for premature determination	V

A Start Phase Galvanostatic can be enabled or disabled before the method is executed.

Measurement Result

The voltage and current curves are recorded as a function of time. Additional measurement signals are also recorded when activated.

Custom Experiment Builder

This experiment is a combination of the following blocks:

• Open Circuit Measurement

• Ramp - Current Voltage Curve

• Polarization