Hello, I am in the process of putting the benchtop flow battery together. It is a bit difficult to get the exact materials.
My knowledge of plastic and its chemistry is somewhat limited.
I'm interested in why the specific plastics were used and which ones could be used as substitutes.
What criteria need to be considered?
What has already been tested?
What else could be tested?
I have started the first tests with the RFB. I have encountered the problem that the electrolyte migrates from one reservoir to the other. I assume that a better separator material would help. I am currently using three pieces of photo paper. Could more layers of photo paper reduce the effect?
The pumps I use are probably a little too big, which certainly doesn't help.
I assume that with larger cells, the problem will intensify and that a better separator material than photo paper will be necessary.
It seems to me that there is no way to obtain small quantities of a proper separator. At least, I couldn't find any online.
Now to my actual questions:
What other materials could be used as separators?
Which one would be the most suitable to buy at the moment?
Has anyone of you been able to obtain small quantities of a separator material?
The idea of a bypass valve has also crossed my mind.
Hoses with a smaller diameter are already installed.
I have conducted a few tests on the flow rate. Currently, at low speed, I have a flow rate of 70 ml/min.
