Alexander Quinn (AqueousColors)
Alexander Quinn (AqueousColors)
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Introduction to Electrochemical Impedance Spectroscopy (EIS)
A brief introduction to electrochemical impedance spectroscopy (EIS) prepared as coursework for 10.626, Electrochemical Energy Systems, MIT Chemical Engineering, Spring 2020.
Contributors: Erin Nguyen, Alex Quinn, Katherine Steinberg, & Debbie Zhuang
For further reading, we recommend:
Impedance Spectroscopy Theory, Experiment, and Applications, 3rd edition, edited by Dr. Evgenij Barsoukov & Dr. J. Ross Macdonald (ISBN 9781119333173)
Electrochemical Impedance Spectroscopy, 2nd edition, by Mark E. Orazem and Bernard Tribollet (ISBN 9781119341222) www.gamry.com/application-notes/EIS/basics-of-electrochemical-impedance-spectroscopy/ lacey.se/science/eis/ www.ameteksi.com/-/media/ameteksi/download_links/documentations/library/solartonanalytical/electrochemistry/technical%20report%2024%20gabrielli%20applications%20of%20eis.pdf?la=en
Interesting literature applications of EIS:
Detection of Tuberculosis - doi.org/10.1039/b905192a 
Detection of HbA1c (for measuring blood glucose concentration) -  doi.org/10.1002/elan.201200233
Differentiation of normal and malignant prostrate tissue - doi.org/10.1109/TBME.2007.897331
Study of malignant and normal breast tissue - doi.org/10.1016/S0302-4598(98)00079-8
Determination of the state of organs - doi.org/10.1109/tmi.2002.800606 Freshness of fish - doi.org/10.1111/j.1365-2621.2000.tb13586.x
มุมมอง: 75 896

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ความคิดเห็น

  • @sensational-v5h
    @sensational-v5h 4 หลายเดือนก่อน

    Thank you for the lecture. It is very insightful.

  • @eddybash1342
    @eddybash1342 5 หลายเดือนก่อน

    Very nice ;

  • @pinsantoni
    @pinsantoni ปีที่แล้ว

    Thank you for this extremelly clear explainantion!

  • @2mrRB
    @2mrRB ปีที่แล้ว

    Really nice video. Can you explain why ZReal (real resistance right?) is lowest at high frequencies? And why does it increase with lowering frequency?

  • @nazmialsaafeen
    @nazmialsaafeen ปีที่แล้ว

    You're amazing, thank you. you mentioned the critical bits without making it long and dull.

  • @kubumshel
    @kubumshel ปีที่แล้ว

    Great video

  • @oov7183
    @oov7183 2 ปีที่แล้ว

    Thanks ! This video helps me a lot !

  • @subhrajyotighosh6714
    @subhrajyotighosh6714 2 ปีที่แล้ว

    Thank you very much for explaining in such a easy manner

  • @shwetakeshri487
    @shwetakeshri487 2 ปีที่แล้ว

    really helpful video.

  • @ficklaw
    @ficklaw 2 ปีที่แล้ว

    Thank you so much for sharing this.

  • @mhd112211
    @mhd112211 2 ปีที่แล้ว

    Wow, the best explanation I've seen and also only for a course work....you should start making contents!

  • @zahiddogan
    @zahiddogan 2 ปีที่แล้ว

    Thank you for sharing this video. I have a question, why real part of impedance vary with frequency in nyquist plot? Or do i misinterpreting what graph tells?

  • @naohaqzhang1560
    @naohaqzhang1560 2 ปีที่แล้ว

    Thanks a lot! Those boring books really made me exhausted :(

  • @shashidharmuniswamy2620
    @shashidharmuniswamy2620 2 ปีที่แล้ว

    Thank you so much for the video. What is the graph at 2:01 called, please? Where can I read more about the same? I mean, I understand your explanation, but I need a literature source.

    • @AcrosstheNanoverse
      @AcrosstheNanoverse 2 ปีที่แล้ว

      Perhaps search for "Lithium concentration gradient at electrode surface"

    • @shashidharmuniswamy2620
      @shashidharmuniswamy2620 2 ปีที่แล้ว

      @@AcrosstheNanoverse Thank you!

    • @alexanderquinn3177
      @alexanderquinn3177 2 ปีที่แล้ว

      @@shashidharmuniswamy2620 Yeah! Lithium should have some great examples. The graph itself is species concentration vs position for a process called "chronopotentiometry". I would also recommend reading up on the "electrical double layer".

    • @shashidharmuniswamy2620
      @shashidharmuniswamy2620 2 ปีที่แล้ว

      Hi@@alexanderquinn3177 Thank you for your response!

  • @rolakhaled7147
    @rolakhaled7147 2 ปีที่แล้ว

    In the video at 8:12 min How you can interpret a niquist plot starting from 15band not from zero .What does his means? what is responsible for this shift?

    • @alexanderquinn3177
      @alexanderquinn3177 2 ปีที่แล้ว

      Generally, a shift like that means there is a resistor component, in this case, equal to 15 units (e.g., ohms).

  • @manellassoued5268
    @manellassoued5268 3 ปีที่แล้ว

    thank you very interesting. I have a problem. I can't find the equivalent circuit for my reponse impedance. It's complicated. I need help .

    • @AcrosstheNanoverse
      @AcrosstheNanoverse 2 ปีที่แล้ว

      If you're using a manufactured potentiostat (biologic or gamry, for instance), you can contact scientists there. They may be able to help you even without that specific instrumentation - worth a try!

  • @MikeEnergy_
    @MikeEnergy_ 3 ปีที่แล้ว

    Amazing. Do you know how to calculate the time constant of a process?

    • @alexanderquinn3177
      @alexanderquinn3177 2 ปีที่แล้ว

      Really depends! Often you can find theory for a particular process that will help you find the time constant. Do you have a specific process in mind?

  • @89ksantoso
    @89ksantoso 3 ปีที่แล้ว

    THANK YOU i've been dying understanding EIS from books, and your video really helps me!

  • @mairaanam4335
    @mairaanam4335 3 ปีที่แล้ว

    Would really appreciate a transcript of this video

  • @mustafayasiraydin
    @mustafayasiraydin 3 ปีที่แล้ว

    thanks for concise explanations

  • @vipulkumarsharma3159
    @vipulkumarsharma3159 3 ปีที่แล้ว

    HI, how did you animate the curve shown at 7:30 minutes?

    • @alexanderquinn3177
      @alexanderquinn3177 3 ปีที่แล้ว

      Hi Vipul. We used Matlab and its VideoWriter tool.

  • @ranjeevparashar331
    @ranjeevparashar331 3 ปีที่แล้ว

    Why mainly AC biased is employed for the EIS studies?

    • @louroc425
      @louroc425 2 ปีที่แล้ว

      Dc does nothing for the reactance or the imaginary part of impedance. You won’t measure anything helpful with static measurements. You’ll just get real part or resistance. Actually come to think you might get some information at the Instant that you switch the load

  • @joodiverse767
    @joodiverse767 3 ปีที่แล้ว

    Omg thank you for your helps a lot!!! Desperately looking forward to your next video

  • @michaelviti5091
    @michaelviti5091 3 ปีที่แล้ว

    This video was very helpful! Thank you

  • @eliesermejia55
    @eliesermejia55 3 ปีที่แล้ว

    excellent

  • @Study-vk6fs
    @Study-vk6fs 3 ปีที่แล้ว

    Wow amazing explanation please keep making videos you are helping humanity progress :)

  • @nirmalendukuanr6531
    @nirmalendukuanr6531 3 ปีที่แล้ว

    Thank you. This is a very informative video.

  • @juhaklee1011
    @juhaklee1011 4 ปีที่แล้ว

    Thanks for your explanation in detail

  • @mohamedgar1396
    @mohamedgar1396 4 ปีที่แล้ว

    Thank you. It was really helpful.

  • @andreiacarvalho5271
    @andreiacarvalho5271 4 ปีที่แล้ว

    [organic solar cells] Hey guys. Does anyone know how to extract diffusion coefficient, kinetic parameter and electrolyte resistance from EIS measurements in OSCs?

    • @alexanderquinn3177
      @alexanderquinn3177 4 ปีที่แล้ว

      Unfortunately, I am unfamiliar with the physics of organic solar cells. If I understand correctly, electrons/holes are the only current-supplying species as opposed to electrons/ions in batteries/fuel cells. Two ideas come to mind: holes transport differently than ions although I believe diffusion coefficients still apply (with slight modification to the transport model) and second, the gap between the electrodes is smaller than typical separator thicknesses in batteries/fuel cells. These might impact the interpretation of the Nyquist plot/equivalent circuit. Frankly, I don't know if the same methods of extracting diffusion coefficients apply but it has been done, as shown in the following sources: Perrier, Gérard, et al. "Impedance spectrometry of optimized standard and inverted P3HT-PCBM organic solar cells." Solar Energy Materials and Solar Cells 101 (2012): 210-216. Ripolles-Sanchis, Teresa, et al. "Diffusion-recombination determines collected current and voltage in polymer: fullerene solar cells." The Journal of Physical Chemistry C 116.32 (2012): 16925-16933. I'd be surprised if a textbook doesn't cover this. I wish I had more time to look into it, hope this helps you start!

  • @aisyahzulkefli7490
    @aisyahzulkefli7490 4 ปีที่แล้ว

    good job guys.. nice flow, graphic.. just nice.. keep up the good work

  • @polokocollen7072
    @polokocollen7072 4 ปีที่แล้ว

    Thank You.

  • @elijahkadimba4205
    @elijahkadimba4205 4 ปีที่แล้ว

    Nice work, you guys definetly gave me insight

  • @nareshr5055
    @nareshr5055 4 ปีที่แล้ว

    Excellent