this post was submitted on 23 Oct 2025
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The Sodium-Ion Battery Revolution Has Started (cleantechnica.com)
submitted 2 days ago by floofloof@lemmy.ca to c/technology@lemmy.world
123 comments fedilink hide all child comments
 

cross-posted from: https://lemmy.bestiver.se/post/693048

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[–] supersquirrel@sopuli.xyz 34 points 2 days ago* (last edited 2 days ago) (1 children)

HiNa supplied sodium-ion batteries for JAC Motors in 2023. 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. They have outstanding temperature range, yielding 88% retention at -20°C. For reference, the discharge capacity of NMC at 0°C, −10°C and −20°C is only 80%, 53%, and 23% of that at 25°C. The HiNa batteries had a cycle life of 4,500 cycles with 83% retention and a 2C charge rate, but even better sodium-ion batteries are on their way.

...

These developments point the way to much more. The cost of sodium battery materials is much lower than for any lithium battery. There are no resource bottleneck materials like cobalt or lithium to contend with. In addition, aluminum can be used for electrodes, whereas lithium requires copper for one of the electrodes. Carbon or graphite and separator materials will be similar, but in all other respects, sodium has much lower material costs. Compared to LFP, sodium does not require phosphorous, a substance that is almost exclusively sourced from one state in north Africa, nor lithium, a relatively abundant but more expensive substance than sodium. LFP cannot compete on material costs or temperature range, and both BYD and CATL expect to phase it out first in energy storage. ‌

[–] 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.