this post was submitted on 23 Oct 2025
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[–] progandy@feddit.org 15 points 2 days ago* (last edited 2 days ago) (1 children)

Early batteries had lower gravimetric energy density (145 Wh/kg) and volumetric energy density (330 Wh/liter) than LFP, but sodium-ion batteries have already improved since then.

OK, and where are the new numbers? 1% better, but still much worse than lfp?

Edit:a bit later they mention 175 Wh/kg and 10,000 lifetime cycles for some catl cells, that is not too bad, but still not great with lfp at about 200 Wh/kg which still is less than ~~Lithium Ion~~ NMC.

[–] Telemachus93@slrpnk.net 10 points 2 days ago (1 children)

with lfp at about 200 Wh/kg which still is less than Lithium Ion.

LFP is a lithium-ion technology. You probably meant "worse than NMC", which is another, older, higher density but less safe lithium-ion technology.

[–] progandy@feddit.org 4 points 2 days ago

Right, thanks. did not remember that name and searching yielded articles writing it like that so I went with it.