CO2 Batteries That Store Grid Energy Take Off Globally

Re:CO2 Batteries That Store Grid Energy Take Off Globally by LikeBeans on Monday December 22, 2025 @10:09AM (#46354708)

I wonder how does it compare to hoisting a concrete (or something heavy) block up a pulley system as an energy store? When you need the energy you let it slide down pulling some steel cable that turns a generator, or multiple cables into multiple generators. Or even a cascade of concrete blocks at different heights as a space saver.

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Re:CO2 Batteries That Store Grid Energy Take Off Globally by sowbug on Monday December 22, 2025 @10:14AM (#46354757)

The article does address that.

...and even dangling heavy objects in the air and dropping them. (The creativity devoted to LDES is impressive.) But geologic constraints, economic viability, efficiency, and scalability have hindered the commercialization of these strategies.

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Re:CO2 Batteries That Store Grid Energy Take Off Globally by cenamus on Monday December 22, 2025 @10:30AM (#46354895)

Probably extremely poorly, as that's basically pumped hydro on _tiny_ scale. The amount of mass/water that fits into storage lakes is insane

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Re:CO2 Batteries That Store Grid Energy Take Off Globally by LikeBeans on Monday December 22, 2025 @04:56PM (#46359604)

Good point. I was thinking more about areas without much water and a large field of poles each hoisting several blocks. Sort of wind turbines but without the blades.

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