Recent content by danielfp248

You can also paint the outer plastic with an oil based paint that is impervious to CO2. This can allow you to prevent CO2 flowing into the cell through the housing without having to change the entire body.

More information about the DIY flow battery on my blog : https://chemisting.com/2024/03/15/an-open-source-diy-flow-battery/

If you are in the Neatherlands or close in the EU, we will be holding a free workshop in Eindhoven in April, it would be great if you can attend (https://www.eventbrite.com/e/flow4ubattery-event-pioneering-energy-storage-solutions-tickets-851447120257?aff=oddtdtcreator). We will be explaining...

I have given it a try, it definitely sucks at chemistry or I suck at prompting AI.

Sure, you can control dendrites this way and make your energy efficiency drop to 10% due to the omhic losses that happen. Whenever you hear people talking about solutions having the energy efficiency and coulomb efficiency data measured with their ideas is fundamental. Although Robert loves to...

The problem is not hurricanes. Even normal wind speeds are very problematic in these approaches. I would suggest watching these videos, which summarize a lot of the technical problems with this idea. Also note the titles of the videos are overly antagonistic for views, I don't view the idea as...

There are many problems with gravity batteries that use weights, in the context of towers it has never worked so far due to basically problems with keeping weights stable in the wind. The only viable trials up until now are using mine shafts, at least to the best of my knowledge. Water has...

Wherever you have the ability to pump large volumes of water and store them, this is definitely the best solution.

See this paper for a comprehensive comparison between Lithium Ion, Sodium Ion and flow batteries https://www.sciencedirect.com/science/article/pii/S0378775323008029

I don't think I will play with this backplated configuration anymore. It is too hard to make because basically any mistake in the entire assembly or any deterioration of the insulating coating means you will get dendrites that will short the battery. It is a very difficult to engineer approach...

Pure Fe batteries are great in that the Fe is extremely cheap. There are however two main issues with them (for me): 1. They need very acidic electrolytes (HCl 3M), which are unsafe to keep and use at my house. 2. They have extremely high levels of H2 generation, which makes their CE really...

Robert would have us believe everyone could be building 100 kWh batteries in their kitchens using 19th century technology. Sadly there are good reasons why those technologies never received massive adoption. I've always been critical of the lack of quantitative rigor and data in his videos...

Flow batteries are definitely better suited to 1. Flow batteries can have high CE and EE values (>95% and >90%) but those are much more costly to achieve. Currently such installations are at around 300 USD per 100 kWh, the lower EE ones using microporous membranes and none vanadium chemistries...

No, the surface area of the copper anode is indeed much smaller than the surface area of the felt, by a factor of perhaps a thousand or more. The felt is a very porous conductive solid, while the copper is a simple flat surface. The difference is that the zinc can deposit over zinc while iodine...

I repeated the entire process of building the pouch cell and tried charging it. The overpotential is now massive, even at a current of 0.4mA/cm2 the starting charging potential is already above 1.6V, at the same current density as the proof of concept cell the potential is 2.3V ? . In...