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First time posting on an energy forum regarding solar power, so... hello everyone :) Basically, what brought me here is due to danielfp248's research and dedication to diy energy storage solutions and doing so with a relatively high ease of manufacturing. I found his research via the...

My last comments on RedFlow. In their ZBM3 Installation and Operation Manual they state: The ZBM is ideally suited to daily cycling of its full capacity Self-Maintenance Cycle Frequency: Optimally every full discharge. A minimum of once every 72 hours of zinc pump operation. For warranty to be...

This is interesting so I thought I would share. Been looking at a few RFB's available on or to the market in order to learn more about them and one type of general interest are the all organic variant, as in an organic molecule is used in both the anolyte & catholyte. One such organic molecule...

The goal is to be able to live 100% off-grid with a multiple kWh battery storage at hand and be able to perform service as well as adjust the size. I also want the battery to be able to have a few thousand cycles (ideally), have low self-discharge and to keep the need for maintenance and service...

But the salts are non consumable, the only consumption is water due to hydrogen evolution or evaporation. That one has to replace the entire electrolyte on the NiFe that often is new to me... honestly, that is brand new info. In some cases when the battery has been sitting for a long time (many...

To add to this debate in regards to mobile solutions lets compare: Non renewable: Gasoline: 12,2 kWh/kg .. Renewable: Ethanol: 7,85 kWh/kg Birch (wood): 4,25 kWh/kg Pine (wood): 3,74 kWh/kg Renewable to an extent. Li-Ion battery: 0,15-0,296 kWh/kg NiMH battery: 0,10 kWh/kg Lead Acid battery...

Nice to hear from you and that you are monitoring the action and reaction of the chemicals, always something :)

"please be good and please be stable and don't throw a tantrum" ... LOL

https://redflow.com/wp-content/uploads/2022/12/Redflow-ZBM3-Datasheet-–-FA-WEB.pdf 100Wh/L

Besides Sulphuric Acid, what other approach to sulfonating are there ?

I was just thinking that, they must have fixed the dendritisation (that should be a word :)) and I'm glad for them. The $8k is more than 5 years ago, so not sure what the real cost is today, but with VAT like Daniel mentioned, I estimate the cost for one ZBM3 to be around $11-13k, which for a...

The Rexolin Mn13 is 12.8% Mn when I look at the specifications ... and again, its a challenge to get a hold of but looking into it or working on it.

When will this end, I have a new question for you ... LOL In your ion exchange membrane research, did you consider the use of Regenerated Cellulose (MWCO of 6,000–8,000 g mol^-1) ? Bellow is a picture which use regenerated cellulose dialysis membrane as the ion exchange membrane as a more...

Alright, then I am happy too :) and indeed, 1.2V via water based electrolyte and neutral pH is really outstanding. What would be the discharge voltage according to this test ? .. (I am yet to learn how to interpret) The CXM-200 is way cheaper than the dialysis membrane I hinted at in an...

I agree, keep the thread to battery.

Q: Proper cycle tests has to be done on the open source flow cell you are planning to build later this year ? So what are you doing now, just monitoring crossover in a static environment ?

Hmm, in an article First published: 09 June 2022 they claim: Herein, we report an all-iron redox flow battery containing Fe/Fe(II) and Fe(III)/Fe(II) redox couples separated by a self-made anion exchange membrane. We also examined the impact of adding Zn(II) ions on the electrochemical...

My bad if that came out wrong, I was only referring to this: Post #82: "membrane is not robust to Mn3+, the oxidized Mn is a decently powerful oxidizer and reacts with the membrane" so not material Manganese oxide.

SO what is the plan now that we know the cellulose+PVA isn't working, are you looking to obtain some CMI-7000S samples for the demo flow cell ?

I like to monitor multiple and parallel projects when I involve myself in something and a parallel project that qualify as parallel is the CMBLu and BALIHT EU project which involves multiple organizations and companies. To put it simple, this is a big project with the focus on organic lignin...

I have a question if you don't mind - not to divert the thread too far, but what is your thoughts about the cellulose+PVA in an acidic environment ?

Unless you are willing to drive around with a trailer containing big tanks of solution weighing a few tons, then no :) - Look at it this way. Tesla's Li-ion sits at roughly 272-296 Wh/kg while lead acid as an example is 35–40 Wh/kg in comparison and the reason I mention lead acid is that this is...

Got it. I find myself spending hours scouring the internet for THE membrane and I will not give up until my non scientific brain can't lift any more rocks. This is fine, I think I am learning ... ;)

Sure, the "what can I really buy right now at the lowest cost?" is among the most productive question in terms of right now and it is paramount I will say for the total cost. I did a speculative cost calculation using CMI-7000 and a target of 24kW potential (as in what I can constantly...

oh no ...

Glad you like it :) I already emailed them regarding sample, so lets see how that turns out and ofc I will make sure you get some. I am going to look over the book I linked to just to see what I can pick up in terms of info. Maybe there is a way to make the ceramic silicon with nicer chemicals...

Got it and thanks for taking the time, its always appreciated. This is valuable information regarding cellulose.

If you don't mind, would you care to share some inside towards what those are, just so that I can widen my resources.

Did you explore the Phosphorylated (Phosphoric Acid) angle ?