Flow Battery Research Collective

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]

@sepi Thanks for trying this. I understand what you mean, I had similar issues when I tried to do this before. The main issue is that the fit is quite tight, so depending on the resolution of both the sleeve and the hole on the endplate, you can have too low of a tolerance for it to work. The easiest fix is probably to increase the size of the holes on the endplate around 0.25mm, so that this works regardless of the printer. We will make the modification on the official endplate exported files so that this approach works more easily.