This is so cool! The engineers at MIT discovered that cement and carbon black (paracrystalline carbon) can be mixed to create a supercapacitor that still behaves like cement. That means you can build cement structures that store energy. They estimate that 45 m³ of this material is enough to store 10 kWh (about a day’s worth of energy for a home).
“New Breakthrough in Energy Storage – MIT Engineers Create Supercapacitor out of Ancient Materials”
