What is the advantage of a sodium based battery?
They are similar to lithium-ion batteries in terms of working principle and cell construction, but they replace lithium with sodium as the intercalating ion1.
Sodium-ion batteries are cheaper to produce, safer to use, and operate better in extreme temperatures than lithium-ion batteries3.
However, sodium batteries of equal capacity are heavier and larger than their lithium equivalents3.
Not so much for neighbourhood battery packs that smooth local area roof solar or for industrial scale battery parks next to solar and wind farms.
Did you forget your sources? And why did you write in such a strange way?
If I had to guess it seems like they meant to cite their sources, but forgot to do so.