Note that you can still run tests at lower SOC values with normal BPT tubing.

It's main purpose is to stabilize higher order polyiodides in solution and therefore prevent solid I2 formation at high SOC values. However if you don't go to high SOC values (keep the battery charge state low, then you can do without it).

@Vorg I did my homework and research the material but sourcing mostly industrial use material can be challenging as an amateur. Especially since the manufacturer in this case is from the USA and I'm in Europe.

We strongly sympathize with you on this front! We've tried to make it as sourcable and low-cost as possible, but this has it limits.

1. First one is ok for the silicone gasket material. Get 0.5mm silicone, which is the one we have tested.

2. This is not adequate. It needs to be conductive graphite felt. For example this one. We use 3mm so the best deal would be the 3x200x1230 one piece.

3. That is the correct link for the pumps. Make sure to get the KPK200 24B motors. Send them a message after you make the purchase to specify the pump. Make sure to be clear about needing the specific pump model because you have a project with dimensions for that specific pump. They have sent me more expensive pumps in the past because these were just not in stock. Tell them it HAS to be KPK200 24B. These pumps are expensive (probably close to 70EUR each), the cheaper versions just don't work for this purpose. Trust me, we tried every pump tier starting from 3EUR and this was the cheapest pump that would run reliably without getting killed by the chemistry or the stress of running continuously pumping the higher viscosity fluids. Cheaper pumps are not strong enough to compress the chemical tubing and the softer tubings leak active material that destroys the pumps at the contact points.

4. This is not adequate, it has to be a graphoil sheet. Like this one. We have routinely used 0.5mm sheets. Graphoil used to be readily accessibly through Aliexpress, but China has recently banned the export of several carbon based materials, including graphoil. Alternatively thin Titanium foil could also be used as an electrode material for the cell. Even 0.1mm Ti foil should be adequate (like you can find here).

5. This is not the proper tubing. The specific tubing from Kamoer we ordered (which is a PTFE lined BPT), is called "Tygon Chemical tubing" by them, they don't have an Aliepxress link for it but if you contact them directly they can sell it to you. The closest tubing they have a link for would be this BPT (here). The diameter would be 4ID 6OD.

Let me know if you have any other questions!