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Boston-based startup Fourth Power, says its 2400°C thermal battery will be 10X cheaper than lithium-ion
(www.inceptivemind.com)
this post was submitted on 19 Dec 2023
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I want to know the efficiency.
Which isn't saying much, really. It exposes "solar" cells to the white hot bricks to regain the energy, but that's going to be maybe 30% efficient. It also uses tin as the heating fluid, at least in the prototype, which is (in spite of popular confusion) a very rare metal.
It's an interesting idea, but I doubt this is going anywhere. Even pumped water or solid weights seems more practical, and sodium ion battery is apparently coming on the market as an option.
yeah that is along the lines I was thinking when reading it. heat it to super high but then collect it as light. does not sound efficient.
Heat in general seems like the shittiest way to store electricity. The real application there is when you wanted heat anyway, like that cement plant (I think?) in Finland that keeps a tower superheated with renewables and then blows air through it into the kiln.
yeah and thats super useful because its one of the things that is hard to do with renewables.
It is, although capturing the CO2 that is generated by the chemical creation of dry concrete is probably an even harder problem in that specific case.
well yeah but its worse if the process is running on gas. At least reduces it.