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I agree, keep the thread to battery.

So, are anyone of you actually saying that storing excess energy in the form of mechanical work (kinetic energy) done during the day when there is a surplus and later tapped into this potential when there is a need and that at the same time, such a system can be scaled to such a level there is...

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

Right. Also, the perspective matters as in laymen vs professional :). I will say that some of the stuff he digs up and show can have some value if and when some of the chemicals used or components cannot be easily sourced, then it can make sense to look at an alternative even if the alternative...

Not to hijack this thread, but I wonder how far one could be able to push the damp paper battery as a viable solution. If anything, that tech would be super DIY friendly and not too toxic.

oh no ...

Good to hear and I am glad you explored another venue for the structure material. Super excited about the qualification of this separator and how it will compare to commercial grade. But, even if the time period between service is less compared to commercial separators, that might not matter...

Exciting news for the separator. It is still and despite the use of sulfuric acid, a budget approach, which is part if your goal.

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

Happy late Easter. I periodically refresh chemisting dot com to see if there is any news and noticed that the page is down. Is it maintenance or something going on ?

Q: Couldn't Fe-EDDHA be used in a similar manor as FeCl ? ... the reason for asking is twofold. One: It would reduce the complexity of the battery and two: reduce the crossover contamination. If it can't, I'd love to hear the reason since I am going on the same ionisation states as that of the...

Necessity if the mother of all inventions which could indicate an external driving force like you focus on in your reply, but necessity is equally found internally, to challenge the mind and to find or expose the true nature of oneself. Not meant to be poetic, but it could be. Inventing or "to...

Some news. Been in contact with a Swedish spinoff company from KTH called Cellfion. In short, Cellfion is a cellulose polymer membrane which is very interesting for this application. Its early days for them and they are a small team of only 6 people, plus, they are waiting for some production...

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

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 ?

Changing things from our position is immensely difficult and humanity speak of the need to work together as we are heading for one of our times most impactful change, marching at us relentlessly (climate change), yet we still find time to slow real progress in the name of profit and financial...

Got an update from Membrion today, the team behind developed the ceramic silicon membrane. The rate of rejection or dismissal from those who develop and produce new and innovative membranes that could benefit the project is staggering. To say I am disappointed is an understatement. So far 3...

To all who are watching this thread and want to learn about battery's, like me :). I found a two part walkthrough of electrochemistry and batteries which I found to be both educational and entertaining to watch. I'm not going to lie, some of this stuff need time to mature, but besides that, its...

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 the manganese oxide is reducing the options rather quickly it seems.

Did you explore the Phosphorylated (Phosphoric Acid) angle ?

Well that is too bad, the premise for the AquaPIM looked really good and now I'm sad..

Membrion is letting me hang here, so I killed some time... and maybe you missed this one... AquaPIM... (no sulfation) specially developed for aqueous RFB. Go With the Flow: Scientists Design Better Batteries for a Renewable Energy Grid...

So what do you think is going on ? I looked at the supporting info but they don't provide any eq's, only quantity's and such. https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/slct.202201222

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...

Saltworks replied and its a dead end.

Slowly realizing that :) .. and I also realized that no matter which SPEEK approach I look at, Sulfuric acid is involved and the journey sort of stop there. Getting hold of Sulfuric acid as a private consumer (EU) is no longer possible, not even in the form of dilute 37% battery acid and I am...

Since I am not a chemist it can be challenging to know exactly where to look for information etc. But I like the silicon dioxide angle, so what if one takes a simpler rout and don't use sulfination but start with potassium silicate or sodium silicate and incorporate ionic salts and produce...

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

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 ... ;)

I just noticed something regarding current density. Fumasep FS-930: 150-400mA/cm^2 CXM-200 (CMI-7000): <50mA/cm^2

Thanks for the link, will dive in. Indeed, they make nano-cellulose and one need proper equipment for that, something neither of us have. But I do find it interesting non the less. I was also checking Fumapem FS-930, but it got higher resistance compared to CMI-7000. So if nothing changes...

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

Its when I read this that I get worried regrading longevity of PFSA. "In all, this first cellulose-based membrane separator for AORFB (all organic redox flow battery) system largely outperformed commercial Nafion 115 membrane in terms of device functional stability, as evidenced by 63% versus...