The initial phase of operations has confirmed the performance of the CO2 Battery and its capability of storing energy for a long duration, all while maintaining highly competitive round-trip efficiency, without degradation or site dependency.

”Our proprietary technology is based on a closed thermodynamic transformation that, by manipulating CO2 between its gaseous and liquid phase, enables efficient and cost-effective energy storage”, says the team behind Energy Dome.

According to them, CO2 is the perfect fluid to store energy cost effectively in a closed thermodynamic process as it is one of the few gases that can be condensed and stored as a liquid under pressure at ambient temperature. This allows for high density energy storage without the need to go at extreme cryogenic temperatures.

In charging mode, the CO2 is drawn from an atmospheric gasholder, the Dome, compressed and then stored under pressure at ambient temperature in a high density supercritical or liquid state.

When energy needs to be released, the CO2 is evaporated and expanded into a turbine, and then returned back to the atmospheric gasholder, ready for the next charging cycle.

You can see how the system created by Energy Dome works in the video below.

Energy Dome’s CO2 Batteries can be quickly deployed anywhere in the world at less than half the cost of similar-sized lithium-ion battery storage facilities, and use readily available materials, such as carbon dioxide, steel and water.

Energy Dome is preparing for its first full-scale 20MW-200MWh plant. Its first commercial project, Commercial Operation Date, is expected to be deployed by the end of 2023.

Energy Dome began its operations in February 2020 and has progressed from a concept to full testing at multi-megawatt scale in just over two years.

The company has already secured multiple commercial agreements, including with an Italian utility A2A for the construction of a first 20MW-5h facility.

Earlier this year, Energy Dome also signed a non-exclusive license agreement with Ansaldo Energia, a major provider of power generation plants and components, to build long-duration energy storage projects in Italy, Germany, the Middle East and Africa.

Energy Dome’s plan is backed by investors including European deeptech venture capital firm 360 Capital, Barclays, Novum Capital Partners and Third Derivative.