This test showed some deterioration on cycling:
[image: 1758097795042-c586de1d-8d24-4884-bd7a-a00afb789080-image.png]
I took out the catholyte and anolyte when charged (you can see the anolyte (left) and catholyte (right) in the pictures below). There isn't any hydroxide precipitation in either one. However there are some pieces of detached Fe metal on the anolyte, which I think are what causes the slight loss in capacity and increases in ohmic resistance as a function of time.
[image: 1758097834649-5ee56443-1754-4f62-9a96-83d6194304ca-image-resized.png]
This circulated without any leaks, even lacking one of the endplates.
[image: 1757751389933-acf0d9aa-832c-4c50-9b03-c659d088e03a-image.png]
I will try doing a 3 cell stack, removing one of the other birch wood end plates.
@gus nice! That's the spirit! Keep us up to date please. I'm almost done building the thing. Printing the PP parts right now then I just need to wait for the pumps, tubing and potentiostat to arrive.
@kirk said in How should we control the centrifugal pumps? TRIAC/thyristor etc? Need help from controls/electrical people:
It seems to work! At least enough for testing purposes. Here is a video: https://spectra.video/w/8xipM8aXnBkDXnu4kkRpqT
Here is the code for this test: https://codeberg.org/FBRC/RFB-test-cell/src/commit/d10834bc7dd67736e708c9a33832a5602ab3ca28/firmware/FlowrateRampTest.ino
K
