It could allow a home to store a full day's worth of energy in its foundation.
Batteries and capacitors may perform the same function of storing energy, but they do so in fundamentally different ways. The former can distribute energy linearly through a chemical reaction, while capacitors release energy in bursts by storing energy as an electrostatic field.
The researchers produced a cement-based material that has an extremely high internal surface area due to the many layers of conductive materials within. "You have these at least two-millennia-old materials that when you combine them in a specific manner you come up with a conductive nanocomposite, and that’s when things get really interesting," Masic said.The mixture only requires as little as three percent of carbon per volume to achieve this complex network of carbon connections.
In experiments, the researchers started small, producing a 1-volt supercapacitor that's roughly the size of a button-cell battery, three of which could power LEDs.
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