Google has entered into a commercial partnership with Milan-based Energy Dome, marking its first long-duration energy storage agreement as part of its push to power operations with 24/7 carbon-free energy by 2030.

Announced Friday, the deal includes a strategic investment by the U.S. tech giant in the Italian energy storage firm, which is known for its CO₂ battery technology that enables long-duration energy storage without relying on critical minerals like lithium and copper. Financial terms of the investment were not disclosed.

Energy Dome’s system stores energy by compressing and liquefying carbon dioxide, which can later be expanded to drive turbines and generate electricity.

The technology offers a sustainable alternative to traditional battery storage, appealing to European regulators focused on energy security and mineral independence.

Google joins existing investors including Oman’s sovereign wealth fund and global storage operator Vopak, underscoring rising interest in novel energy solutions that can support the green transition at grid scale.