OKane 2022 with another SEI model

[iurkens]

Is it possible to use another SEI model than the solvent-diffusion limited one when using Okane's 2022 parameter set?
I'd like to use the interstitial-diffusion limited one. When I try to do this, the solver is unable to solve the equations, and I don't know why.

With kind regards

[RuiheLi]

Hi,

This is because the interstitial-diffusion limited SEI model must have inner SEI layer, whereas the Okane's 2022 parameter set sets them to zero. You just need to change the following parameters to the same value of the example SEI parameter set:

1. Inner SEI reaction proportion: 0.5;
2. Initial inner SEI thickness [m]: 2.5e-9;
3. Outer SEI reaction proportion: 0.5;
4. Initial outer SEI thickness [m]: 2.5e-9;

For more information, you can check here: https://github.com/pybamm-team/PyBaMM/blob/develop/pybamm/models/submodels/interface/sei/sei_growth.py#:~:text=elif%20self.options%5B%22SEI%22%5D%20%3D%3D%20%22interstitial,prefactor%20*%20delta_phi)%20/%20(C_sei%20*%20L_sei_inner)

[iurkens]

Hello

It works, thank you for your the help! I have an additional question:

Do you think it is possible to use the particle model: "swelling and cracking" in combination with the SEI interstitial-diffusion model? It doesn't work now, even with the SEI on cracks disabled.

With kind regards

[RuiheLi]

It should be compatiable. But crack model is something out of my knowledge. Maybe you can post your script or give more information about the errors?

[iurkens]

Hi

This my script (nothing special) and the outputs.

With kind regards

[RuiheLi]

The default voltage cut off for OKANE2022 parameter is 4.2V and 2.5V, as seen here:

So maybe you can reduce the voltage range in the experiment as a start, like charge until 4.0V and discharge until 2.7V