Three electrode potentiostat CS350M consists of DDS arbitrary
function generator, high power potentiostat/galvanostat,
dual-channel correlation analyzer, dual-channel high-speed
16bit/high-precision 24bit AD converter and extension interfaces.
Max. current is ±2A, potential range is ±10V. EIS frequency range
is 10uHz~1MHz. It can be used for various electrochemical fields
such as corrosion, energy, material and electroanalysis. The
current can be boosted up to 20A/40A with a current booster
CS2020B/ CS2040B. Three electrode potentiostat CS350M cannot only
measure the 3-electrode system, but also be applied for other
configurations.
What is three electrode system?
The three electrode system consists of a working electrode, counter
electrode, and reference electrode. The reference electrode's role
is to act as a reference in measuring and controlling the working
electrode potential, without passing any current. Most of the
electrochemical tests are 3-electrodes system.
Advantages of three electrode potentiostat CS350M
Multi electrode system
● three electrode potentiostat CS350M supports 2-electrode,
3-electrode system, and 4-electrode system, can be used to test
battery internal resistance or 4-electrode thin film impedance
measurement
● With Zero resistance ammeter for galvanic current measurement
Full floating
All Corrtest potentiostats / galvanostats including three electrode
potentiostat CS350M are designed as full-floating, and can be used
for electrochemical study of working electrode connecting to earth,
such as autoclave, metal part in bridge, concrete
Real-time data storage
Experiment data can be stored in real time. Even if the test is
interrupted by a power failure, the data will be automatically
saved.
Electrochemical impedance spectroscopy(EIS)
● Three electrode potentiostat CS350M uses correlation integral
algorithm and dual-channel over-sampling technique, and has strong
anti-interference ability. The internal resistance of the
instrument is up to 1013Ω. It's suitable for EIS measurements of high-impedance system
(such as coating, concrete etc.)
● With constant current carrier and DC bias technology,three
electrode potentiostat CS350M can be used for battery impedance
measurement under charge and discharge state, suitable for
ultra-low resistance system (such as 18650 battery, soft pack
battery, battery core...)
Software development kit(SDK)
We can provide secondary development interfaces,API general
interfaces and development examples, and can realize data call for
Labview, C, C++, C#, VC and other program, which is convenient for
secondary development and test methods customization.
High current, high compliance options
●With the CS2020B/CS2040B booster, the current of three electrode
potentiostat CS350M can be boosted to 20A/40A, which meets the
requirement in fuel cell, power battery, electroplating, etc
●Can customize the instrument to be 30V high compliance voltage,
which meets the test requirement in low-conductivity solutions
(organic system, concrete system etc), especially suitable for
carbon and nitrogen reduction study.
Versatile data analysis
CS Studio is the software for Corrtest potentiostat for experiment
control and data analysis. It can do: multi-parameter Tafel curve
fitting, derivation, integration and peak height analysis of
voltammetric curve, EIS equivalent circuit customization and
impedance spectrum fitting, etc.
● Multi-parameters Polarization curve
● EIS fitting
● Electrochemical noise analysis
● Pseudo capacitance calculation
● GCD specific capacitance, efficiency
● Mott-Schottky plot analysis
● CV analysis
Combination test
CS studio software supports the combination test for various
experiments to achieve flexible and
unattended test. You can set the parameters for each experiment in
advance, and set the intervals, wait time etc between each
experiment. The various experiments will run one by one as setting
automatically.
Combination Test: corrosion tests
Combination Test: Pseudo capacitor tests
| Specifications of the three electrode potentiostat CS350M |
| Support 2-, 3-electrode or 4-electrode system | Potential and current range: Automatic |
| Potential control range: ±10V | Current control range: ±2A |
| Potential control accuracy: 0.1%×full range±1mV | Current control accuracy: 0.1%×full range |
| Potential resolution: 10μV (>100Hz),3μV (<10Hz) | Current sensitivity:1pA |
| Rise time: <1μs (<10mA), <10μs (<2A) | Reference electrode input impedance:1012Ω||20pF |
| Current range: 2nA~2A, 10 ranges | Compliance voltage: ±21V |
| Maximum current output: 2A | CV and LSV scan rate: 0.001mV~10,000V/s |
| CA and CC pulse width: 0.0001~65,000s | Current increment during scan: 1mA@1A/ms |
| Potential increment during scan: 0.076mV@1V/ms | SWV frequency: 0.001~100 kHz |
| DPV and NPV pulse width: 0.0001~1000s | AD data acquisition:16bit@1 MHz,20bit@1 kHz |
| DA Resolution:16bit, setup time:1μs | Minimum potential increment in CV: 0.075mV |
| IMP frequency: 10μHz~1MHz | Low-pass filters: covering 8-decade |
| Operating System: Windows 10/11 | Interface: USB 2.0 |
| Weight / Measurements: 6.5kg, 36.5 x 30.5 x16 cm |
| EIS (Electrochemical Impedance Spectroscopy) |
| Signal generator |
| Frequency range:10μHz~1MHz | AC amplitude:1mV~2500mV |
| DC Bias: -10~+10V | Output impedance: 50Ω |
| Waveform: sine wave, triangular wave and square wave | Wave distortion: <1% |
| Scanning mode: logarithmic/linear, increase/decrease |
| Signal analyzer |
| Integral time: minimum:10ms or the longest time of a cycle | Maximum:106 cycles or 105s |
| Measurement delay: 0~105s |
| DC offset compensation |
| Potential automatic compensation range: -10V~+10V | Current compensation range: -1A~+1A |
| Bandwidth: 8-decade frequency range, automatic and manual setting |
Techniques of three electrode potentiostat CS350M
| Techniques | CS350M WITH EIS |
Stable
polarization | Open Circuit Potential (OCP) | √ |
| Potentiostatic (i-t curve) | √ |
| Galvanostatic | √ |
| Potentiodynamic(Tafel plot) | √ |
| Galvanodynamic | √ |
| Transient polarization | Multi-Potential Steps | √ |
| Multi-Current Steps | √ |
| Potential Stair-Step (VSTEP) | √ |
| Galvanic Stair-Step (ISTEP) | √ |
Chrono
methods | Chronopotentiometry (CP) | √ |
| Chronoamperometry (CA) | √ |
| Chronocoulometry (CC) | √ |
| Voltammetry | Cyclic Voltammetry (CV) | √ |
| Linear Sweep Voltammetry (LSV)(i-v) | √ |
| Staircase Voltammetry (SCV) # | √ |
| Square wave voltammetry (SWV) # | √ |
| Differential Pulse Voltammetry (DPV)# | √ |
| Normal Pulse Voltammetry (NPV)# | √ |
| Differential Normal Pulse Voltammetry (DNPV)# | √ |
| AC voltammetry (ACV) # | √ |
| EIS | Potentiostatic EIS (Nyquist, Bode) | √ |
| Galvanostatic EIS | √ |
| Potentiostatic EIS (Optional freq.) | √ |
| Galvanostatic EIS(Optional freq.) | √ |
| Mott-Schottky | √ |
| Potentiostatic EIS vs. Time (Single freq.) | √ |
| Galvanostatic EIS vs. Time (Single freq.) | √ |
Corrosion
measurement | Cyclic polarization curve (CPP) | √ |
| Linear polarization curve (LPR) | √ |
| Electrochemical Potentiokinetic Reactivation (EPR) | √ |
| Electrochemical Noise (EN) | √ |
| Zero resistance Ammeter (ZRA) | √ |
| Battery test | Battery charge and discharge | √ |
| Galvanostatic charge and discharge (GCD) | √ |
| Potentiostatic Charging and Discharging(PCD) | √ |
| Potentiostatic Intermittent Titration Technique(PITT) | √ |
| Galvanostatic Intermittent Titration Technique(GITT) | √ |
| Amperometry | Differential Pulse Amperometry (DPA) | √ |
| Double Differential Pulse Amperometry (DDPA) | √ |
| Triple Pulse Amperometry (TPA) | √ |
| Integrated Pulse Amperometric Detection (IPAD) | √ |
Q: Besides 3-electrode system, can the three electrode potentiostat CS350M
also supports other configurations such as 2-electrode, and
4-electrode system?
A: Yes. Three electrode potentiostat CS350M is a versatile and
comprehension tool for all the electrochemical measurements.
Q: What’s the difference between 2-electrode and 3-electrode system?
A: In the two-electrode system, CE and RE are connected jointly to
one electrode, while WE and SENSE are connected jointly to the
opposite electrode, and then the entire potential is measured,
including the potential at the interface between CE and
electrolyte, and the potential of the electrolyte itself.
Therefore, if the interface potential doesn’t have a critical
effect on the entire study, a two-electrode system can be used.
2-electrode system is usually applied in energy storage or
conversion, such as batteries, fuel cells, solar cells, etc. It’s
also used to measure ultrafast kinetics of electrode processes or
measure electrochemical impedance at high frequencies.
The three-electrode system is the most commonly used setup in
electrochemistry, in which current flows between CE and WE, the
potential between WE and CE is controlled, and the potential is
measured between RE and Sense.
Q: Why do we use a three-electrode system for analytical
electrochemistry?
A: Electrochemical experiments are carried out in an electrochemical
cell. The electrochemical cell works usually with a three electrode
system, consisting of working electrode(WE), reference
electrode(RE) and counter electrode(CE). The RE is used to monitor
the potential of the working electrode. The most commonly used RE
are the saturated calomel electrode and the silver/silver chloride
electrode (Ag/AgCl). A good RE should have a constant potential
with respect to time and temperature which should not be altered by
passing a small current also. In this method, a constant potential
is maintained on the working electrode by using the feed-back
mechanism through the reference electrode. In three-electrode
system, reference electrode offers very high resistance. For this
reason for the current measurement, another electrode called
auxiliary electrode or counter electrode is involved. It completes
the cell circuit. Mostly the CE is an inert metal like platinum
etc.
The electrode in which modifications are performed by using various
electrochemical techniques are called working electrode. In the
electrochemical experiment, reaction of interest occurs at the
surface of the working electrode. The WE is the main electrode
where the potential is controlled and the current is measured. The
use of a three-electrode potentiostat allows the potential at the
working electrode and the current at the working electrode to be
measured with little or no interference or contribution from the
other electrodes.
