One of the areas where renewable energy has great potential is in repurposing entire urban spaces to hide components in plain sight. A novel example is outlined in a new study by researchers at Chalmers University of Technology (CUT), who presented a new cement-based battery that could form the building blocks of entire structures to store energy harvested by renewables. While researching how to reduce the carbon footprint of concrete, the team at CUT drew from previous work on concrete as a means for power storage — such as the work done by the SoftBank-backed Energy Vault. Rechargeable concrete building blocks