I'm sat here thinking: why not compressed or liquefied air? | Hacker News

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		hkt 24 days ago \| parent \| context \| favorite \| on: CO2 batteries that store grid energy take off glob... I'm sat here thinking: why not compressed or liquefied air?

ted_dunning 24 days ago [–]

The basic issue is that they need a phase change at a reasonable temperature. Liquifying air requires much lower temperatures than CO2.

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