In many situations, EIS is run without DC polarization. Meaning, the DC polarization is set to 0V vs Eoc (Open Circuit Potential). This is so the spectra can be acquired at steady-state. There can be exceptions in cases of high impedance coatings, driving a fuel cell, etc, but these are less common. If you email techsupport@gamry.com, one of our engineers can discuss how to set a DC potential that is appropriate for your application.
If your KK transform doesn't fit your experimental data how can you change the conditions of your measurement (voltage amplitude....) to improve the fitting? And if it doesn't fit only at low frequencies, does it invalidate the rest of the spectra? In my case it fits the spectra in the high frequency range (which gives the most important information) and deviates later at low frequencies. Thank you in advance.
There is no valuable information obtained from plotting Impedance vs AC Voltage. The amplitude of the signal is only important in ensuring that you remain in the linear response region for your cell. If you have more questions, please feel free to contact techsupport@gamry.com
Hi Meschac. The basics of our instruments, and how they function, can be found here: www.gamry.com/application-notes/instrumentation/potentiostat-fundamentals/ There are various models of instruments we offer to allow for measurements across a very wide impedance range. More information on each model can be found here: www.gamry.com/potentiostats/browse-all-potentiostats/ If you have any other questions, please feel free to email sales@gamry.com or techsupport@gamry.com, and one of our engineers would be happy to help!
[organic solar cells] Hey guys. Does anyone know how to extract diffusion coefficient, kinetic parameter and electrolyte resistance from EIS measurements in OSCs?
An AC signal is used so that both the real and imaginary components of the overall cell impedance can be measured. This allows for both the resistance and inductance/capacitance to be measured. With a DC signal, only the real impedance can be measured.
Thank you for your interest. All videos we currently have available can be found on our web site : www.gamry.com/resources/gamry-product-videos/ There are also Quick Start Guides available for all of our instruments: www.gamry.com/support/documentation-downloads/ --
The EIS dummy cell (also known as the AC dummy cell) we provide with our instruments uses a 1μF capacitor. So it is a known value from the hardware used. If you have additional questions, please reach out to our Technical Support Engineers at techsupport@gamry.com
There can be many reasons why an overload may occur during an EIS test. You can send your data and cell setup information to techsupport@gamry.com, and one of our support engineers can provide feedback for your specific experiment.
It is possible the FEC, which is added to help prevent blocking SEI formation, actually does some sort of blocking itself. This could slow the reaction down. It is also possible SEI is favored, and so the other path that it is pushed to has slower kinetics (and higher ET resistance). This phenomenon is not fully understood. Going to Research Gate may yield responses from the most up-to-date research in this field.
There are no new webinars currently scheduled. Here is a link to the Registration Page: www.gamry.com/resources/webinars/ - keep checking as we will be scheduling new Webinars and Live Demos. There is a form on this page to register for the webinar you would be interested in. Thanks for your support of Gamry
The PDF is available at this link: www.gamry.com/assets/Uploads/BasicsOfEIS.pdf Visit the Video Library on our web site to view videos of all of our "Live" webinars and download the available PDFs of each -- www.gamry.com/resources/gamry-product-videos/
Thank you for your interest. Here is a link to the PDF version of this webinar: www.gamry.com/assets/Uploads/BasicsOfEIS.pdf Visit the Video Library of our web site to view videos of all our Webinars and to download the available PDF versions: www.gamry.com/resources/gamry-product-videos/
Very comprehensive.!!Thank you
How is DC voltage selected when doing EIS? This is rarely discussed when discussing EIS.
In many situations, EIS is run without DC polarization. Meaning, the DC polarization is set to 0V vs Eoc (Open Circuit Potential). This is so the spectra can be acquired at steady-state. There can be exceptions in cases of high impedance coatings, driving a fuel cell, etc, but these are less common.
If you email techsupport@gamry.com, one of our engineers can discuss how to set a DC potential that is appropriate for your application.
If your KK transform doesn't fit your experimental data how can you change the conditions of your measurement (voltage amplitude....) to improve the fitting? And if it doesn't fit only at low frequencies, does it invalidate the rest of the spectra? In my case it fits the spectra in the high frequency range (which gives the most important information) and deviates later at low frequencies. Thank you in advance.
Why is a plot not drawn between impedance vs applied AC voltage in the EIS study?
There is no valuable information obtained from plotting Impedance vs AC Voltage. The amplitude of the signal is only important in ensuring that you remain in the linear response region for your cell.
If you have more questions, please feel free to contact techsupport@gamry.com
Thanks a lot. I got it.
How can i calculate energy density, electrical conductivity by gamry? in my lab we use 1010e
this is very instructive and clear my question is what can you tell us about the voltammetric and impedance spectroscopy analyzer?
Hi Meschac. The basics of our instruments, and how they function, can be found here: www.gamry.com/application-notes/instrumentation/potentiostat-fundamentals/
There are various models of instruments we offer to allow for measurements across a very wide impedance range. More information on each model can be found here: www.gamry.com/potentiostats/browse-all-potentiostats/
If you have any other questions, please feel free to email sales@gamry.com or techsupport@gamry.com, and one of our engineers would be happy to help!
[organic solar cells]
Hey guys. Does anyone know how to extract diffusion coefficient, kinetic parameter and electrolyte resistance from EIS measurements in OSCs?
Thanks for your comment. Please contact Dr. Jacob Ketter at JKetter@Gamry.com. Dr. Ketter will be able to discuss your question.
Why AC current is employed for EIS studies?
An AC signal is used so that both the real and imaginary components of the overall cell impedance can be measured. This allows for both the resistance and inductance/capacitance to be measured. With a DC signal, only the real impedance can be measured.
Do you have a video of how to start up a gamry 600 potentiostat?
Thank you for your interest. All videos we currently have available can be found on our web site : www.gamry.com/resources/gamry-product-videos/ There are also Quick Start Guides available for all of our instruments: www.gamry.com/support/documentation-downloads/ --
How did you know, that the value for C is C = 1μF in the simplified circuit?
The EIS dummy cell (also known as the AC dummy cell) we provide with our instruments uses a 1μF capacitor. So it is a known value from the hardware used.
If you have additional questions, please reach out to our Technical Support Engineers at techsupport@gamry.com
@@gamryinstruments Ah okay, thank you! I thought that I missed something
what is the meaning of getting overflow for EIS for corrosion measurement? using Gamry reference 3000
There can be many reasons why an overload may occur during an EIS test. You can send your data and cell setup information to techsupport@gamry.com, and one of our support engineers can provide feedback for your specific experiment.
why the charge transfer resistance comes high when the electrolyte is EC/DEC(FEC-10%) and lower when the electrolyte is EC:DEC?
It is possible the FEC, which is added to help prevent blocking SEI formation, actually does some sort of blocking itself. This could slow the reaction down. It is also possible SEI is favored, and so the other path that it is pushed to has slower kinetics (and higher ET resistance). This phenomenon is not fully understood. Going to Research Gate may yield responses from the most up-to-date research in this field.
@@gamryinstruments Thank you
How can i attened the live webinars
There are no new webinars currently scheduled. Here is a link to the Registration Page: www.gamry.com/resources/webinars/ - keep checking as we will be scheduling new Webinars and Live Demos. There is a form on this page to register for the webinar you would be interested in. Thanks for your support of Gamry
Can you guys add a download link to the slides?
The PDF is available at this link: www.gamry.com/assets/Uploads/BasicsOfEIS.pdf
Visit the Video Library on our web site to view videos of all of our "Live" webinars and download the available PDFs of each -- www.gamry.com/resources/gamry-product-videos/
@@gamryinstruments thanks
CAN I GET THIS PPT ? PLEASE
Thank you for your interest. Here is a link to the PDF version of this webinar: www.gamry.com/assets/Uploads/BasicsOfEIS.pdf
Visit the Video Library of our web site to view videos of all our Webinars and to download the available PDF versions: www.gamry.com/resources/gamry-product-videos/