Corrtest Three Electrode Potentiostat CS350M Galvanostat And Potentiostat

Product Specification

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

Techniques of three electrode potentiostat CS350M

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.