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Potentiostat/Galvanostat

Single-channel potentiostat

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Single channel Potentiostat /Galvanostat model CS350

CS350 electrochemical workstation is a general potentiostat/ galvanostat/ FRA designed for general purpose electrochemical measurements.The instrument is capable of a wide variety of electrochemical techniques, and is available with integrated simulation and fitting software functions for both impedance and cyclic voltammetry.CS350 is the most comprehensive model among single channel models.
  • Overview
  • Specifications
  • Software Techniques
  • Download
 

CS350 potentiostat/galvanostat with built-in EIS is the most advanced and comprehensive model among single channel models. It contains a fast digital function generator, high-speed data acquisition circuitry, a potentiostat and a galvanostat. It has more than 40 electrochemical methods including built-in EIS (frequency range 10μHz~1MHz). Max. current is ±2A, potential range is ±10V. It can be used for high current systems such as corrosion, the hot CO2 reduction, and low current measurements as well. It supports 2-,3-,4-electrode system, and can run under floating or grounded mode.


                                                                  
Application                      
● Reaction mechanism of Electrosynthesis, electrodeposition, anodic oxidation, etc.
● Electrochemical analysis and sensor; 
● New energy materials (Li-ion battery, solar cell, fuel cell, supercapacitors), advanced functional materials, photoelectronic materials;
● Corrosion study of metals in water, concrete and soil, etc;

● Fast evaluation of corrosion inhibitor, water stabilizer, coating and cathodic protection efficiency.
 
Hardware
Dual-channel high-speed 16bit/high-accuracy 24bit AD converter;
Built-in frequency response analyzer(FRA), frequency range: 10μHz~1MHz;
High-bandwidth high input impedance amplifier unit
Built-in FPGA DDS digital signals synthesizer
High-power Potentiostat/Galvanostat/ZRA;
Potential control range: ±10V; Compliance voltage: ±21V;
Current control range: ±2A ;
Potential resolution: 10μV; current resolution 1pA.

  

 

Technical Advantages
 
1. Impedance (EIS)
   CS potentiostat applies correlation integral algorithm and dual-channel over-sampling technique, and has strong anti-interference ability. It is suitable for EIS measurements of high- impedance system (>109Ω, such as coating, concrete etc.). It can also be used to obtain Mott-Schottky curve and differential capacitance curve. During test, the software can display real-time open circuit potential(OCP) without entering.

      

EIS plot of Li-battery, frequency range: 10mHz~1MHz

   2. Polarization curve

    It can complete linear polarization curve and Tafel plot measurements. The user can set the anodic reversal current (passivation film breakdown current) of the cyclic polarization curve to determine material’s pitting potential and protection potential and evaluate the its susceptibility to intergranular corrosion. The software employs non-linear fitting to analyze polarization curve, and can make fast evaluation of material’s anti-corrosion ability and inhibitors.

 
Polarization curve of Ti-based amorphous alloy&stainless steel in 3%NaCl solution

3. Voltammetry
   It can do the following electroanalysis methods: Linear Sweep Voltammetry(LSV), Cyclic Voltammetry(CV), Staircase Cyclic Voltammetry(SCV), Square wave voltammetry(SWV), Differential Pulse Voltammetry(DPV), Normal Pulse Voltammetry(NPV), AC voltammetry(ACV), Stripping voltammetry etc. It can complete calculation of the integrated peak area, peak current and standard curve analysis.

                   

  LSV curve: mesoporous carbon material in 0.1M KOH solution

  CV curves in three-electrode cell of PPy in 0.5 mol/L H2SO4 (50 mV/s)
4. Electrochemical Noise
  With high-resistance follower and zero-resistance ammeter, it measures the natural potential/current fluctuations in corrosion system. It can be used to study pitting corrosion, galvanic corrosion, crevice corrosion, and stress corrosion cracking etc. Through noise spectrum, we can evaluate the inducement, growth and death of metastable pitting and crack. Based on calculation of noise resistance and pitting index, it can complete localized corrosion monitoring.

Electrochemical noise of low-carbon steel in 0.05mol/L Cl-+0.1mol/L NaHCO3
5. Full floating measurement
  CS workstation uses full-floating working electrode. It can be used for autoclave electrochemical measurements, on-line corrosion monitoring of metallic components under the ground (rebar in concrete, etc.)
 
6. User-defined methods
   CS workstation supports user-defined combination measurements. The user can set cyclic  timing measurements of an electrochemical method or several methods.
  We are able to provide API functions and development examples, which facilitates some users’ requirements for secondary development and self-defined measurements.

Features of the CS studio software
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.
 


CS studio also provides powerful non-linear fitting on Butler-Volmer equation of polarization curve. It can calculate Tafel slope, corrosion current density, limitation current, polarization resistance, corrosion rate. It can also calculate the power spectrum density, noise resistance and noise spectrum resistance based on the electrochemical noise measurements.
 



Battery analysis: charge & discharge efficiency, capacity, specific capacitance, charge & discharge energy.

EIS analysis: Bode, Nyquist, Mott-Schottky plot



Data auto storage: CS Studio software can achieve real time saving of the measuring data. The data can be automatically saved even in case of sudden power off.

Timing measurement: CS studio software can achieve timing measurements. After you set the experiment and time, click start, then the experiment will be run automatically when it is the time.

  
Combination test: 
CS studio kit has a built-in versatile timing policy for combined measurements, which can facilitate the automation of experiments and save time. With the unique function of combination test, you can choose several techniques, and set the wait time, the start time, and the cycles. Choose the experiments you want to run, and click Add. Then you can make auto measurement of the set experiments as you want without having to wait in the lab. This function is especially useful if you have multi experiments to run and save your time greatly.

  
 

  

 

Display a specific cycle or some cycle(s) in CV : In CV technique and constant current charge and discharge, after measurement, during the data analysis, there is function of selecting the exact cycle(s) to show. You can see a cycle or some cycles among all cycles of the measurement. You can also export data or vector graph of an exact cycle or several cycles.
 

   

  Cycles from 4th ~6th

  

 The 5th cycle only

  

 
Auto Find cathode peak and anode peak: In CV fitting, our software can automatically find the cathode peak and anode peak. The capacitance of the system can be calculated by integration.

  

 

 Background subtraction: During data analysis, “background subtraction” function can be used to reduce the background noise’s influence on the test.
 

 

  
Equivalent circuit: During EIS data analysis, there is built-in fitting function to draw the custom equivalent circuit. Firstly, draw the equivalent circuit, use the “Quick Fit” to obtain the parameters value, and then substitute the value into the equivalent circuit.

 


 OCP check in instrument setting: In instrument setup, by “OCP check” setting, the software can automatically determine change rate of the OCP value. When the change rate is below what’s set here, the software will start measurement automatically. This function is useful for metal corrosion measurement. You can also set the polarity of the current and potential signal. The default is that oxidation current/potential is positive.  

  

 
Data open by txt and Origin: The “.cor”(all data files except EIS are in “.cor” format) and “.z60”(EIS data) data files can be open in txt(in notebook). They can also be open in Origin through “import single ASCII”.

 

   

 

 

 

3D Display

 

 


 

Specifications
Support 2-, 3- or 4-electrode system
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)
Current range: 2nA~2A, 10 ranges
Reference electrode input impedance:1012Ω||20pF
Maximum current output: 2A
Compliance voltage: ±21V
Current increment during scan: 1mA@1A/ms
CV and LSV scan rate: 0.001mV~10,000V/s
Potential increment during scan: 0.076mV@1V/ms
CA and CC pulse width: 0.0001~65,000s
DPV and NPV pulse width: 0.0001~1000s
SWV frequency: 0.001~100 kHz
Minimum potential increment in CV: 0.075mV
AD data acquisition:16bit@1 MHz,20bit@1 kHz
Potential and current range: Automatic
DA Resolution:16bit, setup time:1μs
Low-pass filters: Covering 8-decade
Communication interface: USB
Operating System requirements: Windows 7/win8/win10
Dimensions/weight: 36*30*16cm, 6KG
Electrochemical Impedance Spectroscopy(EIS)
Signal generator
Frequency range:10μHz~1MHz
AC amplitude:1mV~2500mV
Output impedance:50Ω
DC Bias: -10~+10V
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:10cycles 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 CS350 single channel potentiostat


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)
  • 2nd harmonic AC Voltammetry (SHACV)
  • Fourier Transform AC Voltammetry (FTACV)

Amperometric

  • Differential Pulse Amperometry (DPA)
  • Double Differential Pulse Amperometry (DDPA)
  • Triple Pulse Amperometry (TPA)
  • Integrated Pulse Amperometric Detection (IPAD)

Stripping Voltammetry

  • Potentiostatic Stripping
  • Linear Stripping
  • Staircase Stripping
  • Square Wave Stripping
  • Differential Pulse Voltammetry Stripping
  • Normal Pulse Voltammetry Stripping
  • Differential Normal Pulse Voltammetry Stripping

Electrochemical Impedance Spectroscopy (EIS)

  • EIS vs Frequency (IMP)
  • EIS vs Time (IMPT)
  • EIS vs Potential (IMPE)(Mott-Schottky)

Corrosion Measurements

  • 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)

Extensions

  • Data Logger
  • Electrochemical Stripping/ Deposition
  • Bulk Eletrolysis with Coulometry (BE)
  • Rs measurement




 



 

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