Google has taken a major step toward its 24/7 carbon-free energy goal by announcing a long-term commercial and investment partnership with Energy Dome, the company behind a pioneering CO₂ Battery technology for long-duration energy storage (LDES).
The partnership will support the global deployment of Energy Dome’s LDES systems, which can store renewable energy and dispatch it back to the grid for 8 to 24 hours—offering a transformative solution to one of the biggest challenges in clean energy: matching intermittent renewable supply with constant electricity demand.
“By backing Energy Dome, we’re advancing a first-of-its-kind energy storage technology that will help us and the world transition to reliable, round-the-clock clean power,” said Michelle Chang, Senior Program Manager for Advanced Energy Technologies at Google.
Revolutionizing Clean Energy with CO₂
Unlike traditional lithium-ion batteries, which typically provide up to four hours of storage, Energy Dome’s system uses carbon dioxide as a working fluid, compressed and stored in liquid form when renewable energy is abundant. When power is needed, the CO₂ is expanded back into gas, spinning a turbine to generate clean electricity. The system is compact, safe, and designed to operate cost-effectively at scale.
This innovation is already commercially proven. Energy Dome has multiple projects underway in Italy, the United States, and India, including a full-scale 20 MW / 200 MWh facility. Its success marks a major leap toward making LDES a commercial reality in the near term—well ahead of many other advanced technologies still in the pilot phase.
Toward a Cleaner, More Flexible Grid
For Google, the partnership with Energy Dome adds a powerful new tool to its global clean energy toolkit, which already includes investments in geothermal, advanced nuclear, and fusion. The company views LDES as a critical enabler of power system flexibility, grid reliability, and deep decarbonization.
According to studies by the Electric Power Research Institute and the LDES Council, the global deployment of LDES could unlock up to $540 billion in annual savings by 2040, while significantly accelerating the integration of wind and solar into energy systems.
Scaling for Impact
Google’s support includes both direct investment and multiple commercial project agreements with Energy Dome, aiming to accelerate cost reductions and deployment timelines. The company also reiterated its broader strategy to support a range of LDES technologies—both mature and early-stage—through targeted partnerships and policy advocacy.
“This partnership represents an important milestone in our mission to enable 24/7 carbon-free energy,” said Ainhoa Anda, Senior Lead for Energy Strategy at Google. “We believe Energy Dome can play a pivotal role in strengthening grids and bringing dependable clean energy to communities around the world.”
About Energy Dome
Energy Dome is the developer of the world’s first CO₂-based long-duration energy storage solution, offering scalable, low-cost, and safe energy storage that supports the global transition to renewables.
About Google’s Clean Energy Mission
Google is committed to operating on 24/7 carbon-free energy across all its data centers and campuses by 2030. Through innovative partnerships and advanced technologies, Google is helping build the infrastructure for a more sustainable and resilient global energy future.
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News source: https://blog.google/outreach-initiatives/sustainability/long-term-energy-storage/
News and image source: https://energydome.com/energy-dome-inks-a-strategic-commercial-agreement-with-google/