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.
Do you have any link for the claim that overcharging can produce cyanide?
I have never heard such a thing and all the articles that I have seen about overcharging concluded that such batteries are much safer during overcharging than other kinds of batteries, the worst case effect being battery swelling.
In normal conditions, even during overcharging there are no obvious chemical reactions that could produce hydrogen cyanide.
For instance, at
https://pubs.acs.org/doi/10.1021/acsenergylett.4c02915
it is said that cyanide release can happen only at temperatures above 300 Celsius degrees. Such temperatures cannot be reached in normal conditions.
> Such temperatures cannot be reached in normal conditions
Thank you for the reasonable chuckle I got from this understatement of the day.