Looks like Sodium mostly, and Li-ion. Seeing it mentioned more and more in regards to new battery tech. It looks like it can be in liquid form, soooo...
https://www.faraday.ac.uk/wp-content/uploads/2023/10/AilsaORiordanFUSE2023Nexgenna.pdf
You talk about Iron Salt and Manganese salt, but call it a Manganese/Iron battery. I see a lot of talk about Iron/Salt flow batteries, but they seem to be saying salt water as in Sodium. Maybe it was mentioned some were in the pas 8 pages, but I take these are two different batteries. And if so...
I wonder if anyone has tried collecting together and feeding info on flow batteries into one of them new AI programs to see what it could come up with. I know they had one take a stab and a fusion reactor.
So is the the graphite foil and carbon felt the membrane or the polyethylene sheet? Or do they work together and the membrane?
Did you change from matte photo paper?