this post was submitted on 09 Aug 2026
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New sodium-ion battery skips mechanical cooling with 97.9% efficiency (interestingengineering.com)
submitted 2 weeks ago by Return_of_Chippy@lemmy.world 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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[โ€“] Folstar@lemmus.org 3 points 2 weeks ago (1 children)

While I get that this is the narrative, people are overstating this case. High end sodium batteries have a similar energy density range to lower end lithium batteries (~150-175 wh/kg). This idea that people wouldn't buy a battery that is cheaper, safer, and has a much longer cycle life if it weighs a bit more or only runs 80% as long between the faster charges is puzzling at best.

[โ€“] ThomasWilliams@lemmy.world 3 points 2 weeks ago

They have less density than Li ion because of their honeycomb structure. They may have the same output per weight, but they have more volume.