Sodium ion gravimetric energy density is currently around 130 Wh/kg to 160 Wh/kg, but is expected to top 200 Wh/kg in future, above the theoretical limit for LFP devices. In power density terms ...

compared to the 396 Wh/kg in older sodium-ion batteries, this material brings sodium technology closer to competing with lithium-ion batteries. Pieremanuele Canepa, Robert Welch assistant ...