Linear Sweep Galvanostatic

In linear sweep galvanostatic measurements (also known as chronopotentiometry under ramping conditions), a current scan is performed between the start and end currents. The potential and current are measured over time at a defined sampling rate.

The ramp function is defined by specifying the start and stop values (I_start, I_end) and a third parameter (t_ramp or scan rate). The fourth parameter is automatically calculated from the other three parameters.

The galvanostatic linear ramp can be terminated early if a defined potential limit E_min/E_max is exceeded.

Parameter Description

Parameter	Name	Description	Unit
I start	start current	starting DC current	A
I end	end current	maximum DC current of the last step	A
Scan Rate t ramp	\(\frac{|∆I|}{∆t}\) ramp duration	current scan rate for ramping from I start to I end duration for ramping from I start to I end	\(\frac{A}{s}\) 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	\(\frac{1}{s}\)
E min	min potential	minimum potential limit for premature ramp determination	V
E max	max potential	maximum potential limit for premature ramp 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