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Return_of_Chippy@Return_of_Chippy@lemmy.world
⁨5⁩d

New sodium-ion battery skips mechanical cooling with 97.9% efficiency

I’ve been hearing about these for a few years now. Huge if they work out at a large scale.

interestingengineering.com/energy/unigrid-sodium-ion-battery-tech
Interesting EngineeringNew sodium-ion battery skips mechanical cooling with 97.9% efficiencySyntropic Power and UNIGRID have entered a partnership to commercialize UNIGRID’s sodium chromium oxide battery chemistry in North America.
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nanometer1625@nanometer1625@thelemmy.club
⁨4⁩d

Replying to @⁨Return_of_Chippy@lemmy.world⁩

The article says that they contain NaCrO₂. That means that, by mass, they are 21% Na, 49% Cr, and 30% O. So I’m curious: why are they called sodium batteries, and not chromium batteries?

⁨Aug⁩ ⁨11⁩, ⁨2026⁩, ⁨03:07⁩en
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davetortoise@davetortoise@reddthat.com
⁨4⁩d

Replying to @⁨nanometer1625@thelemmy.club⁩

Presumably because Na+ ions are the active charge carriers.

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DeadDigger@DeadDigger@lemmy.zip
⁨2⁩d

Replying to @⁨nanometer1625@thelemmy.club⁩

By mass it would be mostly graphene or water batteries - like always

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