Storing Renewable Energy, One Balloon at a Time

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https://www.nytimes.com/2024/03/18/science/renewable-energy-storage-climate.html

By Amos Zeeberg, The New York Times. 

Excerpt: Central Sardinia ...in Ottana, ..., a new technology is taking shape that might help the world slow climate change. ...Energy Dome, a start-up based in Milan, runs an energy-storage demonstration plant that helps to address a mismatch in the local electricity market. ...Energy Dome uses carbon dioxide held in a huge balloon... as a kind of battery. During the day, electricity from the local grid, some produced by nearby fields of solar cells, is used to compress the carbon dioxide into liquid. At night, the liquid carbon dioxide is expanded back into gas, which drives a turbine and produces electricity that is sent back to the grid....

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