breveSodium-ion EV battery breakthrough delivers 11-min charging and 450 km range
https://electrek.co/2026/03/25/sodium-ion-ev-battery-delivers-11-min-charging-450-km-range/
I don't know what chemistry exactly these cells are using, but in sodium-ion batteries, prussian blue analogs as they are called are common anode materials. Overcharging these cells can lead to a release of hydrogen cyanide gas, notoriously known as Zyklon B.
It has damped my enthusiasm for perusing it as a potential future home energy storage solution.
Just wait until you find out about hydrogen sulfide from overcharged car batteries.
Also, I think HCN can be scrubbed by adding a special absorptive cap onto the battery.
hydrogen sulfide is not anywhere in the same category. When you consider failure you have to consider what is the most catastrophic possibility and if that is “this battery silently kills people” then you dont make it.
Or you could just have the batteries in a separate enclosure away from your house. I think I would be inclined to do this anyway, certainly for Lithium batteries given the possibility of fire.