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

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

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.

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.

@@simulationbyhm5194 Thanks for your response

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

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

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.

Sure iqbal here my email, mhamzamurtaza95@gmail.com 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

what was the warning?

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

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

Thank you, sir!

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

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

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.

The procedure should be same

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

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!