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On a laboratory bench in Cambridge, Massachusetts
For now, the concrete supercapacitor can store a little under 300 watt-hours per cubic metre
OK then, so this is incredibly far from being near any real world application
The average American house on a basement will have something like 40 m^3 of concrete in its foundation. If all of it could be utilized, that’s still ~12kWhr of storage capacity. Nothing to be sneezed at.
Article mentions making roads with this stuff and wirelessly recharging cars as they drive on it. Beware the wankery folks, my BS radar is going off.
