Comment on CATL announces sodium batteries that cost as little as $10/kWh, a massive price reduction compared to the current average of $115/kWh for lithium-ion batteries.

roofuskit@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

• Blue_Morpho@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

  The video says it’s 175 kwhr per kg compared to 185 for LFP that’s already used in some cars. Gold standard is Lion at 300. Volumetric is the same ratios.

  So it’s usable in cars and absolutely immediately useable in homes.

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  • DrunkEngineer@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    Sodium batteries generally have poor round-trip efficiency. This won’t be game-changer for home or solar use unless CATL can solve that problem.

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    • Blue_Morpho@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      Google says 80% compared to up to 95 for LifePO4. Extra 15% cost for waste heat during charging vs 10x cheaper battery.

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• rainwall@piefed.social ⁨3⁩ ⁨weeks⁩ ago

  CATL first uses for the tech are literally car batteries. Your info looks to be outdated.

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  • roofuskit@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    Yes, outdated info then.

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• 9point6@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

  Aren’t the current models only about half as dense as lithium Ion?

  Taking up twice the space for a tenth of the cost seems like a pretty acceptable trade-off for the house scenario

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  • roofuskit@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    Yes, it’s a great trade off, for particular applications.

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• Ek-Hou-Van-Braai@piefed.social ⁨3⁩ ⁨weeks⁩ ago

  Could be used at your house for solar power backup during the night?

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  • WhiteOakBayou@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    Yeah, just double or so the amount of space you’d need for lifepo4. Good if you have some space

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    • lemmylommy@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      Are they as safe as lifepo4?

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      • roofuskit@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

        Safer.

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