CV, LSV, CA, CP, EIS, SWV, DPV, OCP, GITT, PITT, and battery cycling. What each one measures and which ECA model runs it.
| Technique | ECA-LP1 | ECA-5M | ECA-500k | ECA-Zero |
|---|---|---|---|---|
| OCPOpen Circuit Potential | ✓ | ✓ | ✓ | ✓ |
| CVCyclic Voltammetry | ✓ | ✓ | ✓ | ✓ |
| LSVLinear Sweep Voltammetry | ✓ | ✓ | ✓ | ✓ |
| CAChronoamperometry | ✓ | ✓ | ✓ | ✓ |
| CPChronopotentiometry | ✓ | — | — | — |
| EISElectrochemical Impedance Spectroscopy | ✓ | ✓ | ✓ | — |
| SWVSquare Wave Voltammetry | ✓ | ✓ | ✓ | ✓ |
| DPVDifferential Pulse Voltammetry | ✓ | ✓ | ✓ | ✓ |
| GITTGalvanostatic Intermittent Titration | ✓ | — | — | — |
| PITTPotentiostatic Intermittent Titration | ✓ | — | — | — |
| CyclingBattery Cycling | ✓ | — | — | — |
CP, GITT, and battery cycling need galvanostat mode, which only the LP1 has; PITT runs on the LP1 as well. EIS needs the impedance analyser front-end (LP1, 5M, 500k).
OCP
Open Circuit Potential
Potential
Measure the equilibrium potential of the working electrode with no external current applied.
Monitoring corrosion, checking that an electrode has stabilised, and finding the starting potential for a driven experiment.
CV
Cyclic Voltammetry
Voltammetry
Sweep the potential forward and backward, record the current response.
The first experiment on a new material or analyte: it shows which redox processes are present, at what potential, and whether they are reversible.
LSV
Linear Sweep Voltammetry
Voltammetry
Sweep the potential in one direction while recording current.
Polarisation curves and Tafel analysis, where only the forward sweep is needed.
CA
Chronoamperometry
Chronometry
Hold potential at a fixed value, record current versus time.
Sensor calibration, diffusion coefficients from the Cottrell decay, and steady-state currents.
CP
Chronopotentiometry
Chronometry
Hold current at a fixed value, record potential versus time.
Battery charge and discharge, galvanostatic plating, and corrosion studies. Needs the galvanostat mode of the ECA-LP1.
EIS
Electrochemical Impedance Spectroscopy
Impedance
Apply a small AC perturbation across a range of frequencies, measure impedance.
Separating solution resistance, charge transfer, double-layer capacitance, and diffusion in coatings, sensors, and batteries.
SWV
Square Wave Voltammetry
Voltammetry
Superimpose a square wave on a staircase ramp, sample current at pulse peaks.
Quantitative analysis at low concentrations; faster than DPV at similar resolution.
DPV
Differential Pulse Voltammetry
Voltammetry
Short potential pulses on a linear ramp; current sampled before and after each pulse.
Trace-level detection where the capacitive background would bury the peak in a plain CV.
GITT
Galvanostatic Intermittent Titration
Battery
Apply current pulses separated by rest periods and record the potential relaxation after each one.
Diffusion coefficients in battery electrodes. Needs the galvanostat mode of the ECA-LP1.
PITT
Potentiostatic Intermittent Titration
Battery
Apply potential steps separated by rest periods and record the current decay after each one.
Diffusion coefficients and phase transitions in battery electrodes. Runs on the ECA-LP1.
Cycling
Battery Cycling
Battery
Charge and discharge a cell repeatedly at a set current, recording capacity over the cycles.
Capacity fade and coulombic efficiency. Needs the galvanostat mode of the ECA-LP1.
Techniques not listed here are usually added through a firmware update. Write us with what you need to measure.