<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[Blogs]]></title><description><![CDATA[Relevant blog posts from FBRC members as well as others across the fediverse.]]></description><link>https://fbrc.nodebb.com/category/3</link><generator>RSS for Node</generator><lastBuildDate>Tue, 11 Aug 2026 14:06:22 GMT</lastBuildDate><atom:link href="https://fbrc.nodebb.com/category/3.rss" rel="self" type="application/rss+xml"/><pubDate>Wed, 20 May 2026 17:39:45 GMT</pubDate><ttl>60</ttl><item><title><![CDATA[#RealTimeChem cycling an all-iron flow battery!!]]></title><description><![CDATA[I'm no chemist, so this may not apply here, but I've been looking at info on different batteries. I looked at Nickel/Iron because of their known long life. One change mention from original Edison design is adding a little Lithium oxide or dioxide ( forget exactly) to the electrolyte To extend the life of the Iron electrode.
There was also something about making plates (instead of just using sheets of iron) using iron powder with carbon (for conductivity) and something else which I forget that reduced the production of hydrogen.
]]></description><link>https://fbrc.nodebb.com/topic/cc1d9bf6-53b3-4bc5-a57c-883ab48b8ef5/realtimechem-cycling-an-all-iron-flow-battery</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/cc1d9bf6-53b3-4bc5-a57c-883ab48b8ef5/realtimechem-cycling-an-all-iron-flow-battery</guid><dc:creator><![CDATA[Vorg]]></dc:creator><pubDate>Wed, 20 May 2026 17:39:45 GMT</pubDate></item><item><title><![CDATA[Lab Notebook Entry #17]]></title><description><![CDATA[Edit: after original post, realized that one connection lead was loose, and the negative pump tubing was blocked/degraded---PTFE liner had detached from the wall and formed some sort of blob inside the tubing, it seems.]]></description><link>https://fbrc.nodebb.com/topic/46798ca5-89e0-4beb-96f0-8cffa8eed17b/lab-notebook-entry-17</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/46798ca5-89e0-4beb-96f0-8cffa8eed17b/lab-notebook-entry-17</guid><dc:creator><![CDATA[kirk@social.coop]]></dc:creator><pubDate>Tue, 19 May 2026 14:09:30 GMT</pubDate></item><item><title><![CDATA[Lab Notebook Entry #16]]></title><link>https://fbrc.nodebb.com/topic/5a8edcb1-7c09-4801-88cf-37fac2d05863/lab-notebook-entry-16</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/5a8edcb1-7c09-4801-88cf-37fac2d05863/lab-notebook-entry-16</guid><pubDate>Wed, 22 Apr 2026 13:23:18 GMT</pubDate></item><item><title><![CDATA[Lab Notebook Entry #15]]></title><link>https://fbrc.nodebb.com/topic/3ad97ce8-a6c7-4ff3-af10-26934776e332/lab-notebook-entry-15</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/3ad97ce8-a6c7-4ff3-af10-26934776e332/lab-notebook-entry-15</guid><pubDate>Sat, 18 Apr 2026 11:14:36 GMT</pubDate></item><item><title><![CDATA[Lab Notebook Entry #14]]></title><link>https://fbrc.nodebb.com/topic/8c78fde1-fdb8-454b-be4e-f9ab47f2104c/lab-notebook-entry-14</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/8c78fde1-fdb8-454b-be4e-f9ab47f2104c/lab-notebook-entry-14</guid><pubDate>Thu, 16 Apr 2026 13:15:43 GMT</pubDate></item><item><title><![CDATA[Lab Notebook Entry #13]]></title><description><![CDATA[@idlestate also, some studies of these systems I think point to complexes being formed in solution, that contain both chloride and iodide/iodine, like ICl-, for example. They might show up with some spectroscopic techniques like Raman? So chloride can play more of a role than just supporting electrolyte.]]></description><link>https://fbrc.nodebb.com/topic/ed7f0f13-79c7-4063-995f-fa48ee9cc928/lab-notebook-entry-13</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/ed7f0f13-79c7-4063-995f-fa48ee9cc928/lab-notebook-entry-13</guid><dc:creator><![CDATA[kirk@social.coop]]></dc:creator><pubDate>Wed, 08 Apr 2026 16:52:57 GMT</pubDate></item><item><title><![CDATA[Lab Notebook Entry #12]]></title><description><![CDATA[@Methylzero "I heard you like batteries, so I got you a battery for your battery..." Definitely  it's backing up a headless Raspberry Pi, a potentiostat, Arduino, and two peristaltic pumps.]]></description><link>https://fbrc.nodebb.com/topic/4aa1ef38-8203-4557-9eb1-4154614107f0/lab-notebook-entry-12</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/4aa1ef38-8203-4557-9eb1-4154614107f0/lab-notebook-entry-12</guid><dc:creator><![CDATA[kirk@social.coop]]></dc:creator><pubDate>Tue, 31 Mar 2026 15:21:25 GMT</pubDate></item><item><title><![CDATA[Lab Notebook Entry #11]]></title><description><![CDATA[I mean stable as in, it hasn't obviously degraded. "Stable" cycling means different things to different people ofc.]]></description><link>https://fbrc.nodebb.com/topic/c69de955-34ed-48d1-a669-7065dc481c69/lab-notebook-entry-11</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/c69de955-34ed-48d1-a669-7065dc481c69/lab-notebook-entry-11</guid><dc:creator><![CDATA[kirk@social.coop]]></dc:creator><pubDate>Mon, 30 Mar 2026 16:41:47 GMT</pubDate></item><item><title><![CDATA[Managing electrolyte volume imbalance in flow battery testing &#x2F; Lab Notebook Entry #10]]></title><link>https://fbrc.nodebb.com/topic/3ab97307-c4f9-40a4-8098-550ee57dbc43/managing-electrolyte-volume-imbalance-in-flow-battery-testing-lab-notebook-entry-10</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/3ab97307-c4f9-40a4-8098-550ee57dbc43/managing-electrolyte-volume-imbalance-in-flow-battery-testing-lab-notebook-entry-10</guid><pubDate>Fri, 27 Mar 2026 12:19:31 GMT</pubDate></item><item><title><![CDATA[Lab Notebook Entry #9]]></title><description><![CDATA[@trevorflowers thanks for the kind words, and please feel free to ask questions about things you don't understand! I'm writing these lab notebook entries in a concise way and not doing much explaining]]></description><link>https://fbrc.nodebb.com/topic/cd20fe0c-bb36-4a03-959d-2abf98308fb9/lab-notebook-entry-9</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/cd20fe0c-bb36-4a03-959d-2abf98308fb9/lab-notebook-entry-9</guid><dc:creator><![CDATA[kirk@social.coop]]></dc:creator><pubDate>Thu, 26 Mar 2026 10:09:08 GMT</pubDate></item><item><title><![CDATA[Zn-Br sulfamate battery stability]]></title><link>https://fbrc.nodebb.com/topic/08fcc687-1f94-4a14-9842-c584a99e694d/zn-br-sulfamate-battery-stability</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/08fcc687-1f94-4a14-9842-c584a99e694d/zn-br-sulfamate-battery-stability</guid><pubDate>Mon, 23 Mar 2026 12:38:33 GMT</pubDate></item><item><title><![CDATA[Reproducing Zn-Br flow batteries using Sodium Sulfamate]]></title><link>https://fbrc.nodebb.com/topic/920dd0a2-93ac-4c19-b0a8-c31bf58c7041/reproducing-zn-br-flow-batteries-using-sodium-sulfamate</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/920dd0a2-93ac-4c19-b0a8-c31bf58c7041/reproducing-zn-br-flow-batteries-using-sodium-sulfamate</guid><pubDate>Fri, 20 Feb 2026 12:50:54 GMT</pubDate></item><item><title><![CDATA[Could we create a Zn-Br flow battery using Nicotinamide?]]></title><link>https://fbrc.nodebb.com/topic/1aa6c9da-f04f-4add-ad7e-a6d18a32ee85/could-we-create-a-zn-br-flow-battery-using-nicotinamide</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/1aa6c9da-f04f-4add-ad7e-a6d18a32ee85/could-we-create-a-zn-br-flow-battery-using-nicotinamide</guid><pubDate>Fri, 13 Feb 2026 14:16:57 GMT</pubDate></item><item><title><![CDATA[The ultimate demise of my last Redflow ZCell]]></title><link>https://fbrc.nodebb.com/topic/54/the-ultimate-demise-of-my-last-redflow-zcell</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/54/the-ultimate-demise-of-my-last-redflow-zcell</guid><pubDate>Thu, 04 Dec 2025 05:35:08 GMT</pubDate></item><item><title><![CDATA[Updates on development kit, large-format cell, roadmap]]></title><link>https://fbrc.nodebb.com/topic/51/updates-on-development-kit-large-format-cell-roadmap</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/51/updates-on-development-kit-large-format-cell-roadmap</guid><pubDate>Wed, 15 Oct 2025 20:58:58 GMT</pubDate></item><item><title><![CDATA[Studying a WiSE based all-Fe chemistry using our flow battery kit]]></title><link>https://fbrc.nodebb.com/topic/d91ef6e7-7b14-438e-b094-974613cf242e/studying-a-wise-based-all-fe-chemistry-using-our-flow-battery-kit</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/d91ef6e7-7b14-438e-b094-974613cf242e/studying-a-wise-based-all-fe-chemistry-using-our-flow-battery-kit</guid><pubDate>Mon, 15 Sep 2025 09:03:50 GMT</pubDate></item><item><title><![CDATA[New Certified Open Source Hardware!]]></title><description><![CDATA[Congratulations, that's great to hear!
]]></description><link>https://fbrc.nodebb.com/topic/52e8d7a0-5b8b-4260-aad8-e932e367da62/new-certified-open-source-hardware</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/52e8d7a0-5b8b-4260-aad8-e932e367da62/new-certified-open-source-hardware</guid><dc:creator><![CDATA[sepi]]></dc:creator><pubDate>Fri, 29 Aug 2025 03:22:10 GMT</pubDate></item><item><title><![CDATA[Yeah… That went well.]]></title><link>https://fbrc.nodebb.com/topic/9d62da61-513c-4c7e-84ac-20e6cdb6e83b/yeah-that-went-well.</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/9d62da61-513c-4c7e-84ac-20e6cdb6e83b/yeah-that-went-well.</guid><pubDate>Fri, 01 Aug 2025 08:58:23 GMT</pubDate></item><item><title><![CDATA[Working on a large scale open source flow battery design and kit]]></title><description><![CDATA[I'm no expert ether. We used quick setting plaster a lot in construction for repairs on a lot of things and now they have a "wood epoxy" which is an epoxy for wood repairs. You have a thing epoxy you brush on onto wood which provides a good bonding surface for dry rotted wood and then you mix an epoxy that works more like the quick setting plaster and creates a strong enough repair that you can nail it. These plasters and epoxies could be formed or poured to create a nice mold. For the quickset we could build up an area, then carve and shape it before it fully set. The surface is very smooth and with a spray sealer of some kind should be even better for molds.
A quick look into casting, it looks like the most common is using silicon for making the mold. Yes it lets you do detail, but it is also soft and flexible. Not good for making thin plates without warpage.
]]></description><link>https://fbrc.nodebb.com/topic/9baae384-75b5-40bc-ae3c-de14abd8f8e4/working-on-a-large-scale-open-source-flow-battery-design-and-kit</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/9baae384-75b5-40bc-ae3c-de14abd8f8e4/working-on-a-large-scale-open-source-flow-battery-design-and-kit</guid><dc:creator><![CDATA[Vorg]]></dc:creator><pubDate>Sun, 22 Jun 2025 17:26:18 GMT</pubDate></item><item><title><![CDATA[A low cost, open source, Cu&#x2F;Mn rechargeable static battery]]></title><link>https://fbrc.nodebb.com/topic/650865a6-9042-44cb-94b5-11587d90fa0e/a-low-cost-open-source-cu-mn-rechargeable-static-battery</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/650865a6-9042-44cb-94b5-11587d90fa0e/a-low-cost-open-source-cu-mn-rechargeable-static-battery</guid><pubDate>Fri, 23 May 2025 13:17:08 GMT</pubDate></item><item><title><![CDATA[FAIR-Battery Project website review]]></title><description><![CDATA[Hi Otmar! I think it would be helpful to see a rough schedule of the workshop and time allocations per topic/activity - then it would be easier to give feedback for the site, based on specifics of the activity the site is meant to complement!
]]></description><link>https://fbrc.nodebb.com/topic/17/fair-battery-project-website-review</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/17/fair-battery-project-website-review</guid><dc:creator><![CDATA[kirk]]></dc:creator><pubDate>Sat, 10 May 2025 12:58:45 GMT</pubDate></item><item><title><![CDATA[Long term cycling of our Flow Battery kit using a Zn-I chemistry]]></title><description><![CDATA[Nice work, Daniel. I am thinking of plumbing solutions to the imbalance issue:
From A review of all-vanadium redox flow battery durability:

After studying the capacity fade for mixed acid electrolyte, UET [154] found that, during long‐term operation, the ratio of catholyte and anolyte concentration remained constant: 1.3:1. Based on this finding, they designed an overflow system with different volume (volume ratio: 1.3:1) anolyte and catholyte tanks, in which the volume ratio and total vanadium were kept constant. With the new design, the VRFB achieved long term capacity and efficiency stability. However, this design is only valid for the mixed acid electrolyte system. Recently, Wang et al [152] developed an electrolyte reflow method to solve the electrolyte imbalance issue for the sulfuric acidvanadium electrolyte system. Figure 10 shows the schematic of their method; without reflow, eventually all of the anolyte will move to the catholyte tank, while with reflow, the anolyte tank will always contain some electrolyte. Similar to the UET method, the volume ratio of catholyte to anolyte is a key parameter affecting the capacity stability and is highly dependent on the operating current density. Cycle life and total capacity were all improved with the reflow method.

There is also Capacity balancing for vanadium redox flow batteries through electrolyte overflow but it was retracted - they think they accidentally had a pinhole in their membrane for the test. But they did build a real overflow system:
[image: 1739741378711-aceadcdb-fb4d-4387-b6c6-9b95a79cc192-image.png]
]]></description><link>https://fbrc.nodebb.com/topic/af6d45d2-00a4-4d1b-94eb-7ca211261c9d/long-term-cycling-of-our-flow-battery-kit-using-a-zn-i-chemistry</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/af6d45d2-00a4-4d1b-94eb-7ca211261c9d/long-term-cycling-of-our-flow-battery-kit-using-a-zn-i-chemistry</guid><dc:creator><![CDATA[kirk]]></dc:creator><pubDate>Sun, 16 Feb 2025 19:05:29 GMT</pubDate></item><item><title><![CDATA[Publishing my and @andrew &#x27;s list of flow battery companies as a public resource!]]></title><link>https://fbrc.nodebb.com/topic/18486dbc-26e2-4840-ac86-9a96782ab13e/publishing-my-and-@andrew-s-list-of-flow-battery-companies-as-a-public-resource</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/18486dbc-26e2-4840-ac86-9a96782ab13e/publishing-my-and-@andrew-s-list-of-flow-battery-companies-as-a-public-resource</guid><pubDate>Mon, 27 Jan 2025 22:15:45 GMT</pubDate></item><item><title><![CDATA[Revisiting the idea of using chelates for the Fe&#x2F;Mn flow battery]]></title><description><![CDATA[Excited to try this in the dev kit one day... Though you mentioned that Mn(III)-EDTA might cause some trouble
]]></description><link>https://fbrc.nodebb.com/topic/4fa76fc9-dfda-4709-a193-9570614334cc/revisiting-the-idea-of-using-chelates-for-the-fe-mn-flow-battery</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/4fa76fc9-dfda-4709-a193-9570614334cc/revisiting-the-idea-of-using-chelates-for-the-fe-mn-flow-battery</guid><dc:creator><![CDATA[kirk]]></dc:creator><pubDate>Mon, 02 Sep 2024 20:12:50 GMT</pubDate></item><item><title><![CDATA[Is Fe&#x2F;Mn chemistry viable for a true flow battery?]]></title><link>https://fbrc.nodebb.com/topic/f05d5ce8-0bbf-49f7-a232-8ceb5f3570d3/is-fe-mn-chemistry-viable-for-a-true-flow-battery</link><guid isPermaLink="true">https://fbrc.nodebb.com/topic/f05d5ce8-0bbf-49f7-a232-8ceb5f3570d3/is-fe-mn-chemistry-viable-for-a-true-flow-battery</guid><pubDate>Tue, 20 Aug 2024 11:39:55 GMT</pubDate></item></channel></rss>