No idea about GM, but it is probably true as the economics and practicality of sodium batteries are irresistible. Every EV maker probably has sodium batteries on their itinerary.Saw an article couple weeks ago that GM was moving to replace current lithium-ion batteries with these new sodium ion batteries. Has there been any confirmation of this?
I recently saw a glowing review of a largeish (1600Wh I think) battery bank that used sodium ion, it is from a big and popular power bank company. To me that is a strong go signal for sodium ion batteries, CATL is probably running 24/7 pumping out these things.






