Galvanostatic charge discharge potentiostat CS350M consists of DDS arbitrary function generator, high power high precision potentiostat and galvanostat, EIS/FRA module, 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. Equipping with galvanostatic charge discharge(GCD), Cyclic Voltammetry(CV), EIS, Potentiostatic Intermittent Titration Technique (PITT), and Galvanostatic Intermittent Titration Technique (GITT) makes it an ideal electrochemical potentiostat in energy and battery field. In addition, galvanostatic charge discharge potentiostat CS350M can also be used for various other electrochemical fields such as corrosion, electrocatalysis, biosensor, electrodeposition, and electroatanalysis etc. The current can be boosted up to 20A/40A with a current booster CS2020B/ CS2040B.

Galvanostatic charge discharge principle

The technique galvanostatic charge discharge (GCD) tests (also called “Constant Current Charging/Discharging”) is often employed to evaluate energy storage systems and materials, like those involved in electrochemical capacitors. Galvanostatic charge discharge (GCD) involves the application of constant positive and negative currents to charge and discharge a material within a set potential limit(most common) or tie limit. This process is often repeated for multiple cycles. Galvanostatic charge discharge (GCD) profiles are used to evaluate the quality of capacitive response, identify the possible presence of irreversible Faradaic reactions and to derive several key EC figures of merit, such as capacitance, capacity, energy and power.

The clear interface of Corrtest CS studio for Galvanostatic charge discharge (GCD)

Advantages of galvanostatic charge discharge potentiostat CS350M

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)

● With constant current carrier and DC bias technology, Galvanostatic charge discharge 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...)

● Galvanostatic charge discharge 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.

Multi electrode system

● Galvanostatic charge discharge potentiostat CS350M support 2-, 3-, 4-electrode system, can be used to test battery internal resistance or 4-electrode thin film impedance measurement

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.

High current, high compliance options

●With the CS2020B/CS2040B booster, the current of the galvanostatic charge discharge potentiostat CS350M can be boosted to 20A/40A, which meets the requirement in fuel cell, power battery, electroplating, etc

Versatile data analysis

CS Studio is the software for Galvanostatic charge discharge potentiostat CS350M 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.

● GCD specific capacitance, efficiency

● EIS equivalent circuit fitting

● CV analysis

● Pseudo capacitance calculation

● Mott-Schottky plot analysis

● Multi-parameters Polarization curve

● Electrochemical noise 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 various experiment will be carried out automatically without you keep staying in the lab.

Combination Test: Pseudo capacitor tests

Software Features of galvanostatic charge discharge potentiostat CS350M

Cyclic voltammetry: CS studio software provides users a versatile smoothing/differential/ integration kit, which can complete the calculation of peak height, peak area and peak potential of CV curves. In CV technique, during the data analysis, there is function of selecting exact cycle(s) to show.

Battery Test and analysis:

charge & discharge efficiency, capacity, specific capacitance, charge & discharge energy.

EIS analysis: Bode, Nyquist, Mott-Schottky plot

During EIS data analysis, there is built-in fitting function to draw the custom equivalent circuit.

Techniques of galvanostatic charge discharge potentiostat CS350M

Battery test

• Battery Charge and Discharge
• Galvanostatic charge discharge (GCD)
• Potentiostatic Charging and Discharging(PCD)
• Potentiostatic Intermittent Titration Technique (PITT)
• Galvanostatic Intermittent Titration Technique (GITT)

Electrochemical Impedance Spectroscopy (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.)

Stable polarization

• Open Circuit Potential (OCP)
• Potentiostatic (I-T curve)
• Galvanostatic
• Potentiodynamic (Tafel plot)
• Galvanodynamic (DGP)

Transient Polarization

• Multi Potential Steps
• Multi Current Steps
• Potential Stair-Step (VSTEP)
• Galvanic Stair-Step (ISTEP)

Chrono Method

• Chronopotentiometry (CP)
• Chronoamperametry (CA)
• Chronocaulometry (CC)

Voltammetry

• Linear Sweep Voltammetry (LSV)
• Cylic Voltammetry (CV)
• Staircase Voltammetry (SCV) #
• Square Wave Voltammetry (SWV) #
• Differential Pulse Voltammetry (DPV) #
• Normal Pulse Voltammetry (NPV) #
• Differential Normal Pulse Voltammetry (DNPV) #
• AC Voltammetry (ACV)
• 2^nd harmonic AC Voltammetry (SHACV)
• Fourier Transform AC Voltammetry (FTACV)

Corrosion Measurements

• Cyclic polarization curve (CPP)
• Linear polarization curve (LPR)
• Electrochemical Potentiokinetic Reactivation (EPR)
• Electrochemical Noise (EN)
• Zero resistance Ammeter (ZRA)

Standard supplyof Galvanostatic charge discharge potentiostat CS350M

CS350M potentiostat galvanosat *1

CS studio software*1

Power cable x1

USB cable x1

Cell/electrode cable x2

Dummy cell(1kΩ||100µF) x1

Manual