
Google Massive Battery Uses State-Shifting CO2 As A Storage Medium
Google has partnered with Italian company Energy Dome to use carbon dioxide–based long-duration energy storage (LDES) systems that can stabilize renewable energy grids. The system stores excess solar or wind power by compressing CO₂ gas into liquid form and later releasing it back as gas to drive turbines when energy demand rises. Unlike lithium-ion batteries that last around four hours, Energy Dome’s technology can supply clean energy for up to 24 hours, improving grid reliability. Google’s investment aims to scale this CO₂ battery globally, supporting renewable integration and community access to affordable, resilient electricity.