Wuhan Corrtest Instruments Corp., Ltd.
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EIS bipotentiostat CS2350M hydrogen permeation test has two sets of built-in independent potentiostat /galvanostat. The two channels can jointly complete experiment of RRDE and hydrogen permeation test. Full floating module and electrical isolation design guarantee each channel is totally independent, which ensures accurate data. EIS bipotentiostat CS2350M hydrogen permeation test
is the real double-channel potentiostat. Experiments can also be conducted at the same time in each channel(see below picture: the 2 channels connect to 2 coin cells).It uses Ethernet connection. EIS module is included in both channels. Each set provides full electrochemical techniques including EIS.
Applications of EIS bipotentiostat CS2350M
EIS bipotentiostat CS2350M can do all that a single-channel potentiostat can, as there are 2 sets potentiostat/galvanostat inside of CS2350M eis Bipotentiostat/Bigalvanostat. EIS bipotentiostat CS2350M can be used in the following applications, and can do testing on two samples at the same time.
(1) Electrosythesis, electrodeposition (electroplating), anodic oxidation, electrolysis
(2) Electrocatalysis such as Oxygen reduction reaction (ORR), OER, HER, CO2 reduction.
(3) Li-ion battery, solar cell, fuel cell, supercapacitor, advanced function materials, sensor, etc
(4) Corrosion behavior of metals, and anti-corrosion evaluation
(5) Fast evaluation of inhibitor, water quality stabilizer, coating, and cathodic protection efficiency.
One of the typical applications of EIS bipotentiostat CS2350M
Hydrogen permeation Test (HDT)
Photo of EIS bipotentiostat CS2350M hydrogen permeation test setup
CS2350M bipotentiostat is combined with H-cells. By measuring current of cathode hydrogen charging and hydrogen atoms anode oxidation, it can further calculate the diffusion coefficient of hydrogen atoms in metal and hydrogen flux.
The electrochemical method proposed by Devanathan-Stachurski to measure the diffusion rate of atomic hydrogen in metals.
Diagram of EIS bipotentiostat CS2350M hydrogen permeation test
The device is composed of two electrolytic cells. The left one is hydrogen elimination chamber (anode chamber). A constant potential is applied on the anode surface of the specimen. The hydrogen atoms diffused from the cathode surface are oxidized on the anode surface.The right cell is the hydrogen charging chamber (cathode chamber). During hydrogen charging, the cathode current is applied on the cathode surface.
Specifications of EIS bipotentiostat CS2350M hydrogen permeation test
| Specifications | |
| Support 2-, 3- or 4-electrode system | Interface: Ethernet |
| Potential control range: Primary Channel: ±10V second Channel: ±10V | Current control range: ±1A in each channel |
| 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: ±1A in each channel | 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 |
| Potential and current range: Automatic | Weight / Measurements: 6.5kg,36 x 30 x16cm |
| Operating System: Windows 7/8/10/11 | |
| Electrochemical Impedance Spectroscopy (EIS) | |
| 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- EIS bipotentiostat CS2350M hydrogen permeation test
Bipotentiostat
Stable polarization
Transient Polarization
Chrono Method
Voltammetry
Electrochemical Impedance Spectroscopy (EIS)
Corrosion Measurements
Battery test
Amperometric
Stripping Voltammetry
Extensions
· Data Logger
· Electrochemical Stripping/ Deposition
· Bulk Eletrolysis with Coulometry (BE)
· Rs Measurement
Application
Corrosion: Corrtest potentiostats incl. EIS bipotentiostat CS2350M have all the electrochemical techniques for corrosion measurement such as OCP, polarization curve (potentiodynamic), EIS, Cyclic polarization CPP (passivation curve), Electrochemical Potentiokinetic Reactivation (EPR), Hydrogen diffusion test, ZRA, Electrochemical noise, etc. It can be used to study metal corrosion mechanism and corrosion resistance, and evaluate the coating durability and sacrificial anode current efficiency. It can also be used for rapid screening of corrosion inhibitors, fungicides, etc.
Left: Polarization curves of Ti-alloy& stainless steel in 3%NaCl solution Right: EN of low-carbon steel in 0.05mol/LCl+0.1mol/LNaHCO3
EIS bipotentiostat CS2350M 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)
Salt spray aging test of high impedance coating
Energy
With techniques LSV, CV, galvanostatic charge and discharge (GCD), Constant potential/ current EIS, and precise IR compensation circuit, Corrtest potentiostats incl. EIS bipotentiostat CS2350M are widely used in supercapacitor, Li-ion batteries, sodium-ion batteries, fuel cell, Li-S batteries, solar cell, solid-state batteries, flow batteries, metal-air batteries etc. It is an excellent scientific tool for researchers in the fields of energy and materials.
Salt spray aging test of high impedance coating CV curve of PPy supercapacitor in 0.5 mol/L H2SO4 solution
Electroanalysis
Corrtest potentiostat incl. EIS bipotentiostat CS2350M includes all the voltammetric methods such as NPV, DNPV, SWV, ACV, and can be used for fast analysis of the trace elements in the solution. Voltammetry stripping methods can do the Quantitative analysis according to the stripping peak current.
Stripping voltametric curves in solution of different Pb2+, Cd 2+,Zn2+ concentration
Electro-catalysis
● Corrtest potentiostat incl. EIS bipotentiostat CS2350M can measure the half-wave potential (ORR), overpotential (HER, OER) of the catalyst, and has the function of peak power density and energy density calculation.
● Long-term cyclic measurement for ORR, OER, HER,
CO2RR by techniques such as cyclic voltammetry,
potentiostatic, galvanostatic. Faraday efficiency can be
measured with a bipotentiostat.
LSV curve of catalysts in alkaline solution
● Maximum current can be 20A and compliance voltage can be 30V, and with IR compensation technique,
Corrtest potentiostat can precisely measure the overpotential of the electrode, which is a big advantage in electrocatalysis field.