this post was submitted on 11 May 2026
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Have you not been paying attention to the development of sodium batteries? They are already surpassing LithIon batteries in energy density and cost.
Cost, yes, energy density, very much no.
So good for grid storage, bad for vehicles?
Not necessarily bad for cars. Some vehicles can use just sodium batteries. Some companies are looking at making battery packs with mixed cell types in different ratios to get a best of both worlds for their use case. Sodium sucks for personal electronics though
Yes. Chinese manufacturers are using sodium batteries in some low-range cheap city-cars, too. But fundamentally there is less energy storage in a charged sodium atom than a charged lithium atom so it seems sodium batteries must always be bigger and heavier than equivalent-capacity lithium batteries.
Not exactly, they work better in cold temps for northern countries.
That doesn't stop sodium batteries from being fundamentally bigger and heavier than lithium batteries for the same capacity. That just means the tradeoff can be more worth it in some regions