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Potentiostat / galvanostat / EIS

Galvanostats and potentiostats are made for electrochemical measurement in applications such as corrosion, coatings, batteries, general electrochemistry and so on. Electrochemical Impedance Spectroscopy (EIS) is available as an option in each instrument. This technique is utilized to study corrosion batteries, photovoltaics, and in various applications in life sciencesOther options include a broad range of current and voltage boosters.

We offer a wide range of Potentiostat through BioLogic Science Instruments. The range we offer comprises single potentiostats / galvanostats – also configurable as bipotentiostat – and multichannel galvanostats with the possibility of up to 16 channels to take measurements of the electrochemical effects of up to 16 simultaneously.

What exactly is a potentiostat and galvanostat function?

The basic potentiostat utilizes a three electrode system (2 or 4 electrode connections are also possible). It is a device that measures and controls the voltage difference between a working electrode as well as a reference electrode that has a constant power. It analyzes the flow of electricity between the electrode that is working and the counter electrode (that completes the cell circuit). As a galvanostat, the instrument controls the cell current rather than the voltage of the cell.

The electrode used to work could be a metal on which a reaction can take place or if corrosion is measured an example of the corrosion-prone material. When testing batteries it is necessary to connect the potentiostat directly to the battery electrodes.

Electrochemical Impedance Spectroscopy (EIS) experiments allow the user to assess charge transfer resistance, double layer capacitance and ohmic resistance.

What is the reason to use a potentiostat or galvanostat/EIS?

Potentiostats are crucial to the study of the electrochemical mechanisms that cause reactions, e.g. Redox chemistry. Another use is the testing of batteries. Potentiostats can also be used to determine the presence of electrochemically active compounds (e.g. chemicals, toxinsand microbes in solution.

Electrochemical Impedance Spectroscopy (EIS) has many applications. It can be used to study corrosion, e.g. in reinforced concrete, but also in electrode kinetics, batteries, double-layer studies photovoltaic, and solid-state electrochemistry systems.

Our potentiostat / galvanostat / EIS systems

Crucial to the function of a galvanostat/potentiostat and applications such as electrochemical spectroscopy is the software. All of our BioLogic instruments can be controlled using the versatile EC-Lab(r) software, to provide a variety of measurement options, including various options for modular methods, with wait and loop options to build a complex chain of experimentsThe software can also be used to control multiple potentiostats with an interface that is a single view.

A broad range of quality indicators will help users to test their EIS experimentswith respect to non-stationarity (stationarity), linearity or noise.

Additionally, unlike the majority of other systems, it is possible to  modify in real-time’, i.e. modify the parameters during an experiment when results don’t match up to expectations.

Examples of applications of potentiostats / galvanostats / EIS

Metal surfaces may be corroded when they are in contact with a corrosive solution (mostly in the presence of acidic solutions). Electrochemical methods are able to study the behaviour of the material when it is submerged in an acidic solutionGalvanostats, or potentiostats, are employed to analyze the behaviors of this metalTechniques such as e.g., Electrochemical Impedance Spectroscopy (EIS), Linear Polarization Resistance and Tafel Plot experiments are used to study the behavior for the metallic compounds.

The photovoltaic cell are ubiquitous these daysSolar energy is important in local, regional and national energy production. To improve the efficiency this type of energy supply there is a great deal of research that is donePhotovoltaic solar cells ‘ characterization could be done using polarization as well as Electrochemical Impedance Spectroscopy methods, which enable the user to analyze the performance of the cells and develop a mathematical model. The role of electrochemistry into energy fields is at present a hot issue.

Understanding the kinetics and thermodynamics of a reaction occurring on an electrode is the primary goal of the fundamental science of electrochemistryGalvanostat EIS are vital tools in this field. In this case, DC steady-state methods have been used such as: the cyclic voltammetry technique, chronoamperometry Chronocoulometry, chronopotentiometry thermometry, square wave voltammetry and other current-potential methods.

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