Researchers at MIT have developed a low-cost energy storage system using cement and carbon black. The materials can be combined with water to create a supercapacitor, an alternative to batteries, that stores electrical energy. The researchers claim that the supercapacitor could be incorporated into the concrete foundation of a house, storing a day’s worth of energy without adding significantly to construction costs. The technology could also be used to create a concrete roadway that recharges electric cars as they travel over it. The technology could aid the integration of renewable energy sources, which often produce energy at variable times.
https://news.mit.edu/2023/mit-engineers-create-supercapacitor-ancient-materials-0731