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10/07/2026
Ireland is building a battery that contains no lithium.
No cobalt.
No rare-earth metals.
Instead, it stores energy using carbon dioxide.
The project is designed to hold 200 megawatt-hours of electricity, making it one of Europe’s largest long-duration energy storage systems. But unlike conventional batteries, it doesn’t rely on chemical reactions.
It relies on physics.
When wind and solar farms produce more electricity than the grid needs, that extra energy is used to compress carbon dioxide into a liquid. The process releases heat, which is captured and stored.
Later, when electricity demand rises, the stored heat turns the liquid CO₂ back into a gas.
As the gas expands, it spins a turbine and generates electricity.
Then the cycle begins again.
The carbon dioxide never leaves the system.
It stays sealed inside, circulating in a continuous closed loop.
That is what makes the technology so different.
There is no lithium.
No cobalt.
No dependence on critical mineral supply chains.
Instead, the system is built mainly from steel, water, and carbon dioxide.
It is also designed to last.
Developers say the facility can deliver electricity for up to ten hours on a full charge and continue operating for more than 25 years without the gradual loss of storage capacity that affects many conventional batteries.
As more countries shift toward wind and solar power, one challenge continues to grow.
What happens when the wind stops blowing or the sun goes down?
Projects like this are trying to answer that question.
Not by replacing renewable energy.
But by finding new ways to store it until it is needed.
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