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New sodium-ion battery skips mechanical cooling with 97.9% efficiency (interestingengineering.com)
submitted 3 months ago by to c/technology@lemmy.world
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I've been hearing about these for a few years now. Huge if they work out at a large scale.

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[–] 4 points 3 months ago (3 children)

from other comments it seems the energy density of batteries currently on the market is about 2/3rds that of lithium cells.

there's also the asymmetry to worry about: with a max discharge rate of 8C but a charge rate of 3C there could potentially be limits on regen braking. if i'm understanding it correctly, sodium cells degrade quickly at higher charge rates.

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  • [–] 2 points 3 months ago* (last edited 3 months ago)

    Interesting, but from what I understand limited charging would only be a problem if you do not have large enough battery capacity. So for heavier vehicles with larger capacity this might not matter much.

    PS: This video about the CATL NaFePO4 battery also mentions a "half sodium half lithium" battery pack for cars to combine the best of both.

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