Researchers develop energy-storing cement for buildings

Researchers have developed a 3D-printable, cement-based supercapacitor designed to turn building materials into active energy storage devices. By mixing cement with carbon black and carbon nanotubes, scientists have created a conductive ink that can be 3D-printed into interlocking, finger-like electrode patterns on concrete slabs.

Unlike traditional batteries, these supercapacitors charge and discharge much more rapidly and can withstand millions of cycles without significant degradation. While they hold less energy density than lithium-ion batteries, they are well-suited for providing short bursts of power to support lights, sensors, and other small devices within a building.

Laboratory tests indicate that the material maintains structural integrity, withstanding compression as effectively as commercial concrete used for slabs and stairs. This technology aims to integrate renewable energy storage directly into urban infrastructure, potentially reducing the need for external battery banks by using rooftop solar power to charge the building's own foundations and walls.