I would happily dedicate a corner of my garage for a big sodium ion battery.

Also, fun fact they can charge and discharge faster than lithium ion. Also, their chemistry doesn't lead to spontaneous combustion. Perfect for a house backup.

What about the environmental impact of degraded sodium ion batteries?

I'm not going to take sodium mining into account, as there are many ways that it can be extracted, with probably minimal impact, like salt evaporation ponds. I assume it's less destructive than building a hydro dam.

Can we make them from desalination plants, in part? Or no? I don't know the science for it.

I love this too, I just hope they don't use too much Phosphorous, because those reserves are limited too, maybe there are alternative designs once this gets going.

I'm really excited about na-ion, if commercial BMS circuitry was available I would already have some for a few home automation and sensing projects because of their low temp performance alone. But I'll have to spin up a custom implementation with an arduino or something and I don't have that kind of skills lol.

everything else we've used so far (nearly all Lithium based).

We have used water before lithium, and it isn't bad at all.

Would container ships be a good application? Or too heavy/large?

New warning label unlocked: Do not eat the Batteries.

You're not supposed to eat the electricity

Cow lick with kick

Also the size of the thing and what happens to batteries after they die.

Finally something the EU can invest those 600 billion in. Or buy it, like lots of EU startups were by FAANG companies years ago. Tramp says it's dead tech, so it's ok.