Overview

• Google and Energy Dome unveiled their official collaboration on July 30 to integrate long-duration CO₂ battery storage into Google’s clean energy projects globally.
• The closed-loop technology captures and compresses CO₂ into a liquid form during surplus renewable generation and later re-expands it to spin turbines and generate electricity.
• Energy Dome’s system can deliver carbon-free power for up to 24 hours, significantly outlasting the roughly four-hour dispatch capability of typical lithium-ion batteries.
• Early-stage development agreements are in place for projects in Italy, the United States and India through partnerships with Engie, Alliant Energy and NTPC.
• Despite Google’s confirmed investment and recent Wisconsin regulatory approval, specific funding details and deployment schedules have not been released.