Return_of_Chippy@lemmy.world to Technology@lemmy.worldEnglish · 17 days agoNew sodium-ion battery skips mechanical cooling with 97.9% efficiencyinterestingengineering.comexternal-linkmessage-square95fedilinkarrow-up1538arrow-down111file-text
arrow-up1527arrow-down1external-linkNew sodium-ion battery skips mechanical cooling with 97.9% efficiencyinterestingengineering.comReturn_of_Chippy@lemmy.world to Technology@lemmy.worldEnglish · 17 days agomessage-square95fedilinkfile-text
minus-squarenanometer1625@thelemmy.clublinkfedilinkEnglisharrow-up8·edit-215 days agoThe 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?
minus-squaredavetortoise@reddthat.comlinkfedilinkEnglisharrow-up12·15 days agoPresumably because Na+ ions are the active charge carriers.
minus-squareDeadDigger@lemmy.ziplinkfedilinkEnglisharrow-up2·13 days agoBy mass it would be mostly graphene or water batteries - like always
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?
Presumably because Na+ ions are the active charge carriers.
By mass it would be mostly graphene or water batteries - like always