MIT's New Concrete Could Make Home Batteries Obsolete

What if the wall of your house could store electricity? MIT researchers have developed a carbon-cement supercapacitor that combines structural strength with energy storage — and its newest version holds roughly ten times more energy than the original design. In this video, we reveal how an invisible carbon network turns cement into an electrode, examine the twelve-volt module and load-bearing arch already demonstrated by the team, and calculate what a full-size wall could actually store. We also confront the obstacles hidden behind the headline: low energy density, rapid self-discharge, structural compromises, and the flammable organic electrolyte used to achieve the record result. Could buildings eventually store their own solar power and reduce the need for separate lithium batteries? Or will energy-storing concrete remain a fascinating laboratory experiment? Subscribe to Obsolete Tomorrow for evidence-based stories about the inventions trying to replace the machines and materials around us. SOURCES 1. PNAS — peer-reviewed paper presenting the experimental results, electrolyte parameters, scaling analysis, and structural demonstrations: https://doi.org/10.1073/pnas.2511912122 2. PubMed Central — freely accessible full text of the paper and supplementary materials: https://pmc.ncbi.nlm.nih.gov/articles... 3. MIT News — official explanation of the tenfold increase in energy density, the twelve-volt module, and the load-bearing arch: https://news.mit.edu/2025/concrete-ba... 4. MIT News — overview of the original version of the technology and the mechanism that forms the conductive carbon network: https://news.mit.edu/2023/mit-enginee... 5. MIT ec³ Hub — official research page describing the project and the technology's development path: https://eccube.mit.edu/high-energy-de... 6. International Energy Agency — global battery-storage deployment in 2025 and the share accounted for by LFP batteries: https://www.iea.org/reports/global-en... 7. International Energy Agency — growth in demand and the concentration of critical-mineral supply chains: https://www.iea.org/reports/global-cr... 8. U.S. Department of Energy — advantages and limitations of supercapacitors, including low energy density and self-discharge: https://www.energy.gov/sites/default/... 9. CDC/NIOSH — official information on the fire hazards and toxicological properties of acetonitrile: https://www.cdc.gov/niosh/npg/npgd000... 10. U.S. Energy Information Administration — average electricity consumption by U.S. residential customers in 2024: https://www.eia.gov/todayinenergy/det... HASHTAGS #MIT #ConcreteBattery #EnergyStorage #FutureTechnology #Supercapacitor #SmartConcrete #RenewableEnergy #SolarEnergy #HomeBattery #BatteryTechnology #FutureHomes #Engineering #Science #Innovation #ObsoleteTomorrow