Potentiostat / galvanostat / EIS
The galvanostats and potentiostats have been designed to perform electrochemical measurements for applications like corrosion, coatings, batteries, general electrochemistry and many more. Electrochemical Impedance Spectroscopy (EIS) is an option for every instrument. This method of analysis is employed to study corrosion, photovoltaic systems and batteries as well as in certain applications in life sciences. Other options include a broad variety of voltage and current boosters.
We provide a variety of Potentiostat through BioLogic Science Instruments. Our range of products comprises single galvanostats and potentiostats that are that can also be configured as bipotentiostats – and multichannel galvanostats that offer up to 16 channels in order to measure as many as 16 electrochemical experiments simultaneously.
How does a potentiostat/ galvanostat work?
A basic potentiostat uses a three electrode system (2 or 4 electrode connections are also possible). It controls and measures the current difference between a working electrode and a reference electrode that is a constant current. It determines the flow of the current between the working electrode and the counter electrode (that completes the cell circuit). As a galvanostat, the device controls the cell’s current instead of the voltage in the cell.
The electrode that is used for the working could be a metal on which a reaction takes place or – in corrosion measurements – a sample of the degraded material. To test batteries, the potentiostat is connected directly to the electrodes of the battery.
Electrochemical Impedance Spectroscopy (EIS) tests enable users to measure the resistance of charge transfer double layer capacitance, the ohmic resistance.
What are the advantages of using a potentiostat / galvanostat / EIS?
Potentiostats are crucial to the study of chemical reactions, e.g. chemical redox reactions. Another function is the testing of batteries. Potentiostats also can be used to detect electrochemically active compounds (e.g. chemicals, toxins, etc.)) as well as microbes that are in solution.
Electrochemical Impedance Spectroscopy (EIS) can be used for a variety of purposes. It is utilized to study corrosion, e.g. in reinforced concrete however, it can also be used in batteries, double-layer studies photovoltaic and solid-state electrochemistry systems.
Our potentiostat / galvanostat / EIS systems
Essential to the operation of a potentiostat / galvanostat and applications such as electrochemical spectroscopy is the software. All our BioLogic instruments can be controlled using the versatile EC-Lab(r) software. It allows us to give a range of measurement options, including various modes of control, such as loop and wait options that allow you to create complex experimental chain. The program is also able to control several potentiostats in one interface.
A broad range of quality indicators can help users prove the validity of their EIS experiments, with regard to non-stationarity, linearity, or noise.
Finally, in contrast to numerous other systems it is possible to ‘Modify at will’, i.e. alter the settings of a parameter during an experiment if results aren’t as you would expect.
Examples of the applications of potentiostats /galvanostats/EIS
Metallic surfaces can be corroded when they come into contact with a corrosive solution (mostly an acidic solution). Through electrochemical techniques, you can examine the behavior of the material when it is submerged in an corrosive solution. Galvanostats, or potentiostats, are employed to study the properties of these metallics. Techniques like, e.g. Electrochemical Impedance Spectrum (EIS), Linear Polarization Resistance and Tafel Plot experiments are used to determine the behavior for the metallic compounds.
The photovoltaic cell are in abundance these days. Solar energy is crucial to the national, regional, and local energy production. To improve the efficiency such an energy supply, a lot of research is done. Photovoltaic solar cells characterization can be done using polarization as well as Electrochemical Impedance-Spectroscopy techniques which allow the user to determine cell performance and determine the model. The role of electrochemistry into energy fields is currently a hot topic.
Understanding the kinetics and thermodynamics of reactions that occur at an electrode serves as the main purpose of basic electrochemistry. Galvanostat EIS are vital tools in this field. In this case, DC steady-state methods have been utilized such as Chronoamperometry, cyclic Voltammetry chronocoulometry, chronopotentiometry, pulse thermometry, square wavevoltammetry and various other techniques for calculating current potency.