Google is taking a bold step toward making clean energy more reliable by investing in an unusual but promising storage solution: giant “Energy Domes” that use carbon dioxide (CO₂) to store electricity. Italian startup Energy Dome developed these futuristic-looking facilities, which could revolutionize how we store renewable energy and balance supply with demand.
How It Works
Instead of relying on rare materials like lithium or cobalt, these Energy Domes use carbon dioxide in a closed-loop cycle. When there’s excess electricity—such as during sunny or windy periods—the system compresses CO₂ gas into a liquid, effectively storing energy. Later, when power demand rises, the system converts the liquid CO₂ back into gas to drive a turbine and generate electricity.
Why Google Is Interested
Google has pledged to run its operations entirely on carbon-free energy, 24/7, by 2030. To meet this ambitious goal, the company is actively seeking power storage solutions that are both sustainable and scalable. Energy Dome fits that vision. Its domes can supply energy for up to 10 hours and do so at a lower cost with a smaller environmental footprint than traditional batteries.
What’s Next
Alphabet, Google’s parent company, will test the technology through its Moonshot division, X. Energy Dome plans to deploy its first commercial-scale project in the U.S. as early as 2026. If successful, this technology could accelerate the global transition away from fossil fuels and provide a crucial solution to one of clean energy’s toughest challenges: storage.
