Google Bets on CO2 Batteries to Boost Renewable Energy Storage

Data centers need steady power, yet a cleaner grid still has gaps when wind and solar dip. Google says it wants reliable backup for its largest sites. According to Utility Dive editor Robert Freedman, the company is partnering with Energy Dome, a Milan based firm, to build what it calls CO2 batteries.

Instead of storing energy in lithium ion cells, the system stores carbon dioxide in a huge inflatable dome. When extra renewable power is available, the CO2 gets compressed. When power is needed, the gas expands again and spins a turbine. A model plant in Sardinia stores about 2,000 tons of CO2 and can deliver 20 megawatts for 10 hours.

That duration matters because many lithium ion backups cover only part of the night. Energy Dome expects a longer lifetime and says costs fall as the systems scale up. The approach can fit on roughly five acres of flat land, and it can be built faster than pumped hydro projects that often take years and need specific terrain.

Still, the dome is tall, about the height of a sports stadium, so neighbors may resist. If the dome were damaged, some CO2 could escape, so safety rules and transparent monitoring will matter. Siting should avoid sensitive habitat so nearby wildlife and animals do not pay the price for new infrastructure.

Google is not alone. Alliant Energy in Wisconsin has approval to start building a CO2 battery intended to serve about 18,000 homes. Storage will not solve everything, but it can reduce fossil backup and protect the environment. Add efficiency and plant based, vegan eating, and we can Support our health while easing pressure on the planet. Let’s keep choosing options that protect animals and a livable Earth.

Video Source: Undecided with Matt Ferrell/Youtube

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