Cyclic Voltammetry | constant voltage cycling | CV curve of supercapacitor | COMSOL | For Beginner

The main purpose of this COMSOL simulation is to explain how to setup cyclic voltammetry or constant voltage cycling of specific scan rate in COMSOL.
The reference to my paper which I would highly appreciate if you can cite in your papers:
doi.org/10.1016/j.jpowsour.20...
Do subscribe it will motivate me to create videos more rigorously.
I also do appreciate all my viewers and don't forget to post question in the comment section. I will answer as much I can. Thank you so much for watching.
I am so sorry about the video quality you will have to see it in 1080P for it to have clear view.

[@naeemshahzadarshad8970]

keep up the good work. you are awesome

[@sergioalvarez5875]

Thank you very much for the work put on the video! I am reproducing some experimental results from an article and i have a question when doing the CV plot, ¿do i have to represent that "total interface current" or another current variable versus the voltage? Because i get a really low density which does not match the experimental data. Current density magnitude for example is much bigger.

[@simulationbyhm5194]

That is probably because in experiemntal case that is a larger domension compare to this single stack and you might have to model miltiple such stacks to get comparable results to experiment. it basically a matter of scaling. In actual experimental theres a lot of stacks so the current apllied distributed to a much larger interface current compared to this single stack

[@Theoer]

Keep up the good work sir! Also, is it possible to tell me how to get CV curve of pseudocapacitive? I would really appreciate to get some hints or referance for the pseudocapacitive case?

[@simulationbyhm5194]

Pseudocapacitive behavior is a bit tricky you will have to use the Lithium ion battery module in COMSOL which allows for intercalation and double layer capacitive behavior. that is one way to do it.

[@user-sl6ez8ux5o]

Thank you I applied each step you did but only the last one when you plotted the current vs. voltage, you copied the expression from the equation view and pasted it in point graph (cd.itot) the plot is still empty and it gave me a warning

[@simulationbyhm5194]

what was the warning?

[@user-vj4gf5fd9j]

Hello there. Thanks for your video. We work on supercapacitor and pseudocapacitor at the laboratory, we use CV analysis and get curve with 2 peaks in reduction direction and 2 peaks in reverse direction(cause we have 2 half_reaction there) so I want to simulate this with COMSOL but I can't get that curve with 2 peaks. Can you help me or give me some guideline?

[@simulationbyhm5194]

Sorry ata, its quite unique to see two peaks but which ever material you are using for the electrode you should get the Equilibrium voltage (Eeq) and see if that curve is different from the typical Eeq curves we see in literature. If that is the case then your Eeq potential might help in developing those two peaks you speak of.

[@user-vj4gf5fd9j]

@@simulationbyhm5194 Thanks for your response

[@amirkianooshkiani5697]

Hi, I have the same question... did you dind any solution to address the redox peaks in CV for pseudocap?

[@SHIVANGIKAUSHIK-um3kv]

Hello. Could you please tell me what does the colour variation in the final model signifies? What does it mean?

[@simulationbyhm5194]

The color simple shows the potential difference that varies from one end to the other

[@ahsanimran4074]

Hello brother, How can I do Cyclic voltammetry simulation on electrochemical exfoliation of Graphite, to determine the appropriate voltage and concentration of exfoliate the graphite surface?

[@simulationbyhm5194]

Sorry but i have no idea how to do that. The topic sounds more of a molecular dynmics kind of thing instead of continuum.

[@joelmacwan2903]

What to do if I don't see the equation which you copied at 11.52 cd.itot... I did the exact same thing as you did and I can't see that particular bit in my simulation so I'm stuck.

[@simulationbyhm5194]

Maybe you didn't enable the equation view. There is an "eye icon" button at the top of model builder section click that enable equation view that should allow you to see those equations

[@arvindgaurav1493]

if I had to check the stimulation for 1000 cycles which would be an efficient way to add that information to the software?

[@simulationbyhm5194]

Yeah, it wont be efficient way to do that if your cycle number's in hundred. For that I actually have an alternative as well which I will share soon.

[@harishsomala782]

Hiii.. can we develop this CV for a 3D model with just changing the geometry and followed ur video steps??

[@simulationbyhm5194]

yes we can, in fact this is a 3D case with axis symmetry

[@user-xk1mu7qo1r]

can we perform cyclic voltammetry simulation on li-ion battery? if yes then how?

[@user-xk1mu7qo1r]

Is this valid for a 2d-axisymmetric model? This is not working in the 2d model. In the 2d model electric potential is not taking (interpolation value), it is taking direct values like 2v, 4v .....etc.

[@iqbalsinghbal928]

Hello sir. I am researching on supercapacitor using borophene and just starting comsol multiphysics to simulate some materials and different tests. Can you tell me how to add borophene to the comsol material library. It's better if you provide your email or social media handle so i can interact with you, get more information regarding comsol multiphysics, and how to use it for supercaps properties

[@simulationbyhm5194]

Sure iqbal here my email, [e-mail] in case you need to ask further. However, adding specific material properties or a material is quite simple. In comsol when you add a module a node names material actually also gets automatically formed. and you can add a blank material in it which at the start might be empty and when you add further modules lets say li-ion battery the material will automatically asks for those specific material props required. and you need to choose that material in the modules themselves as well to apply it to specific domains in modules

[@tuljadevi3907]

Hello sir, how to get the charge and discharge curves of asymmetrical supercapacitors ?

[@simulationbyhm5194]

its should be simple and you should just observe the voltage and current response at different points. if its the CV (constant voltage) cycling then check the current response and in case of CC (constant current) cycling check the voltage and that would your charge discharge curves

[@tuljadevi3907]

Thank you, sir!

[@user-sl6ez8ux5o]

how can I apply the same tutorial in 3D case?

[@simulationbyhm5194]

The procedure should be same

[@user-ez9wd4or8p]

But the curve shape is not similar to the cyclic voltammogram shape which looks like a duck!

[@simulationbyhm5194]

Yes, that's because this is the CV curve for EDLC/supercapacitor. The one you are expecting is for batteries or possibly for pseudocapacitor.

[@user-ez9wd4or8p]

OK, but as we know that the current density lies on the y-axis while the electric potential lies on the x-axis, but you did the reverse!

[@Ben-cj4vx]

I appreciate your content. Do what the pros do > *promo sm* !