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Flow Battery Research Collective
  • R

    New ion exchange membrane recipe using water softener resin and PVC cement

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    @rowow We don't have the equipment or time to prepare these membranes but if you send us samples of 100-400um thick membranes we can test them out.
  • kirkK

    Upcoming improvements to the dev kit

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    kirkK
    @doho said in Upcoming improvements to the dev kit: I have try-ed to download Your new files from github (.stl and .pdf), but the files all appeared as broken, even in github. The files to sprint for the new endplates are here: https://codeberg.org/FBRC/RFB-dev-kit/src/branch/clampable-cell/CAD/exports [image: 1771858819246-1c46bc80-7e99-4780-8178-46d24a289a32-image.png] I haven't updated the new You have to download them individually, unless you clone the repository with Git LFS set up---the large CAD files are handled with LFS and without LFS installed downloading the repository just downlaods a pointer/reference to the CAD file, not the actual file (at least that's how I understand it). Let me know if this works for you!
  • D

    My Suction Luer Lock

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    kirkK
    Very nice work @doho ! It's great to see your setup. @doho said in My Suction Luer Lock: But for getting reproducible resultants the flow through the cell should be down to up, but not horizontal (how much would be air isolating in the chamber when changing parts?) This is a good point, from what I've seen in other applications cells should generally clear air/produced gases by flowing against gravity from bottom to top, that is still possible with the new setup but the tubing from the pump outlet to cell inlet would have to be slightly longer. In my jig redesign I'll take this into account when writing the documentation.
  • V

    You Tuber Video on an open source all Iron battery

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    The cost per kWh of this is too high, the use of organic materials and ion exchange membranes puts this closer to what people do in academia and further from the cells that can be reasonably fabricated using DIY approaches. The use of an ion exchange membrane likely reduces the lifetime of this cell a lot. For a static cell, I think the sulfuric acid Cu/Mn battery we have discussed before is far more promising. That chemistry requires no exchange membranes, uses only commodity inorganic materials and cycles to 30-40Wh/L. For pure Fe batteries I am much more inclined to the Fe flow batteries.
  • kirkK

    New member introduction thread!

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    kirkK
    Welcome @saphnich and @rowow ! Membranes are definitely something relevant to our work here, to date we have avoided ion-exchange ones like Nafion due to the high cost but having a low-cost and open-source option would be great. I'll hop into the thread @rowow started on DIY membranes. @rowow said in New member introduction thread!: Secondly, using foam core PVC sheets which are readily available and cheap from cabinet shops like imeca allows for complex flow cell designs to be easily and rapidly produced with a simple CNC router on various sizes. I have a flow cell design already I'll be glad to upload. This would be great to see! Feel free to start a thread in @general-discussion about your cell design. We had tossed around the idea of 2D-material milling/laser approaches to flow frames, but have stuck with 3D printed designs for now so that we can have internal geometries in the flow frames - 2D would certainly be easier and cheaper to make, but I was hesitant about the increased gasketing required/adhesives for sealing.
  • R

    Using cnc router cut PVC foam boards as cell frame

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    kirkK
    @rowow said in Using cnc router cut PVC foam boards as cell frame: The long term goal and my personal next goal is to get into injection molding which of course is the best option. At scale, definitely! @rowow said in Using cnc router cut PVC foam boards as cell frame: Ill see about uploading the cell fusion 360 model A .step file would also be great so I could look at it in FreeCAD! I don't have a Fusion 360 license. I'd be curious to see if we could take a similar approach.
  • danielfp@chemisting.comD

    Reproducing Zn-Br flow batteries using Sodium Sulfamate

    Electrolyte Development flowbattery zincbromine
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  • V

    Calcium-ion Battery

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  • V

    No pump flow battery, likely not useful, but interesting

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  • D

    New Zn-Br chemistry using Na sulfamate

    Electrolyte Development
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  • danielfp@chemisting.comD

    Could we create a Zn-Br flow battery using Nicotinamide?

    Blogs flowbattery nicotinamide sulfamate zincbromine
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  • kirkK

    Preprint from Forner-Cuenca group: RfbFoam: An open-source framework for porous electrode modeling in redox flow batteries

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  • kirkK

    Come see FBRC at FOSDEM 2026!

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    kirkK
    Video of the talk is now available here! https://video.fosdem.org/2026/aw1126/3EEZZB-open-source-batteries.av1.webm

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