Steady State Staircase Galvanostatic
In steady state staircase galvanostatic measurements, the device under test (DUT) is polarized from a starting current to an ending current in small discrete steps. After each current step, the system waits until the DUT potential reaches a defined steady state condition. This steady state value is recorded as the measurement at the respective current step.
This technique is used to study electrode reactions and mass transport phenomena, particularly when steady-state conditions are required. It offers advantages over linear sweep galvanostatic measurements in certain applications, especially when surface-confined processes are involved.
Parameter Description
Parameter |
Name |
Description |
Unit |
|---|---|---|---|
I start |
start current |
starting DC current |
A |
I step |
step current |
current of each step for the staircase function |
A |
I end |
end current |
maximum DC current of the last step |
A |
t settle |
settle time |
settling time at I start before the first V-I step is stimulated |
s |
t step |
step duration |
duration of each step of the staircase function of V-I |
s |
t hold |
hold time |
time window from the start of current step in which the termination criterion do not yet apply (minimum runtime) |
s |
Stability |
\(\frac{|∆E|}{∆t}\) |
voltage stabilization criterion for steady-state condition |
\(\frac{V}{s}\) |
ODR |
output data rate |
number of measurement points per second |
\(\frac{1}{s}\) |
E min |
min potential |
minimum potential limit for premature staircase determination |
V |
E max |
max potential |
maximum potential limit for premature staircase determination |
V |
A Start Phase Galvanostatic can be enabled or disabled before the method is executed.
Measurement Result
The voltage-current relationship is typically non-linear and is represented by a curve that includes three distinct regions: activation losses, ohmic losses, and concentration losses. Understanding this V-I characteristic is crucial for the efficient design and operation of electrochemical systems.
Custom Experiment Builder
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