A surprising breakthrough could help sodium-ion batteries rival lithium—and even turn seawater into drinking water. Scientists discovered that keeping water inside a key battery material, instead of removing it as traditionally done, dramatically boosts performance. The “wet” version stores nearly twice as much charge, charges faster, and remains stable for hundreds of cycles, placing it among the top-performing sodium battery materials ever reported.
Sodium ion batteries have less energy density as opposed to Lithium ion (100-150 WH per Kg instead of 150-250). I’m curious how much these “wet” batteries improve that. The article doesn’t say.
Nonetheless, even if it’s not the new battery for your car, it could be useful as energy storage for the grid, storing green (solar) energy for the night, and desalinating seawater at the same time.
My very uneducated understanding is that sodium batteries can be produced virtually anywhere.
Not every battery application needs to maximize energy density, so sodium batteries are good where that is the case.
I also did not read about sodium ion batteries characteristics versus lithium ion, so there might also be other use cases where sodium ion batteries are better.
No thermal runaway if I remember correct as those are not prone to exploding (unlike li-ion/li-po)
Well it’s a pretty big deal, especially for large power storage.
There is a branch of battery research that is only focused on grid storage. It’s the last piece to make solar and to a less extent wind unbeatably affordable.
In a home solar setup, batteries are the other half of the cost and have not fallen as fast as the cost of the panels themselves, the other half of the cost. For fully off grid setups, they quickly become the main cost.
And instead of charging them, you can drink them! Unlike Lithium Ion batteries, which you have to chew.
Its got electrolytes! It’s what plants crave!
Me: looking at plants after realizing that I’m full of ions
“KEEP IT IN YOUR PANTS!”
Sounds like a win/win!
Exactly this, there’s a huge market for energy storage, where cost, power and cycle life matter way more than size and weight. And Na-ion can be produced in countries that do not have access to lithium mines, making transport less of an issue and countries more self-sustaining.
Hilarious…all of these batteries are coming out of one country because only one country is doing serious R&D.
If the data is available for mass production, you just need to copy paste the factory and establish the trading partners for supply chains.
Not the same issue as, for example, ASML and China.
All I could find. This isn’t a statement about capacity(?) Units are wrong(?)
Its worth noting how preliminary this research is. Currently these “batteries” are just jars with chemicals.
https://pubs.rsc.org/en/Content/ArticleLanding/2025/TA/D5TA05128B
https://www.rsc.org/suppdata/d5/ta/d5ta05128b/d5ta05128b2.mp4
mAh/g (milliamp-hours per gram) is essentially still a measurement of capacity, but in terms of current instead of power.
We can do a little dimensional analysis here to translate between them. Power = Current x Voltage, so you’d multiply this (Current x Time)/(Weight) value by the nominal voltage of the cell to get to (Power x Time)/(Weight).
Phone batteries are often specified in units of Current*Time (e.g. milliamp-hours), but I’m not completely sure why. I think it has to do with voltages being standardized for certain types of cells, so the only real variable in the battery capacity is the current.
Edit: rearranged some ideas to make more sense
This is the part that annoys me. The nominal voltage could vary between different batteries. 200Ah/g means different capacity for a 6v battery verses a 48v battery. I’m guessing battery scientists are using standardized nominal voltages for these tests or are seeing the same Ah/g capacity at different voltages (that I may have simply missed in the paper because I skimmed it and I don’t claim any deeper knowledge on battery research)
I think it’s marketing
5000 mAh is much a bigger number than 19 Wh and marketing loves huge numbers
Kinda like BMW did with the i3.
In 2013 Tesla was selling a model with a 60 kWh battery so BMW had the genius idea to install a 20 kWh battery BUT refer to it as “60 Ah” battery.
Tesla introduced the 90 kWh battery? BMW responds with a 94 Ah battery (28 kWh)
Newest Tesla has 100 kWh battery now? BMW has 120 Ah battery (38 kWh)
“See? Higher number!”, says the marketing
And in order to have a comparable range number they had to implement heavy weight reduction techniques like using carbon fiber for the body, negating any cost saving from the smaller battery AND giving the owner a total loss after small collisions as it shatters instead of bending