Dear researchers :

I hope everyone is doing well.

I began to building up a model in Comsol of an example of a Water PEM Electrolyser. I plan to use the physics in the Fuel Cells & Electrolyzers module, in Comsol 6.1.

Actually I already build the geometry (I'm attaching a couple of images here).

But I want to ask to people who have worked on this topic (PEM Electrolysers and Fuel Cells, or of other kind).

How... or better speaking: What could be a good selection for the dimensions of each of the layers (PEM membrane, Electrodes layers, gas diffusion layer, collecting cathode/anode, etc) so the dimensions of my model in comsol can represent a real electrolyser, as one which some research group have experimented, or built on.

Btw, the dimensions of the layers that I used, I got them from this paper:

Experimental and simulation of PEM water electrolyser with Pd/PN-CNPs

electrodes for hydrogen evolution reaction: Performance assessment

and validation

S. Shiva Kumar, Aleksey Ni, V. Himabindu, Hankwon Lim

But I hope someone can give me some advices.

Thanks you so much.