24 hour Energy Dome's CO2 Battery

Energy Dome’s battery charges by drawing CO2 gas from a sealed dome through a compressor and condensing it into a liquid, which is then stored under pressure at ambient temperature in vessels. Heat generated during the compression process is captured and stored. To discharge, the system evaporates the liquid CO2 with the recovered heat, then pushes the gas through a turbine to generate power and back into the dome. There are no emissions from the closed-loop system.

This is a new process that has never been done before, although it’s based on the principle of storing energy with pressure and heat, which is used in biogas plants. To charge the battery, we take CO2 at near atmospheric temperature and pressure and we compress it. The heat that is generated during compression is stored. When we exchange the thermal energy with the atmosphere, the CO2 gas becomes liquid.

To generate and dispatch electricity, the liquid CO2 is heated up and converted back into a gas that powers a turbine, which generates power. The CO2 gas is always contained and the entire system is sealed.

We don’t use any exotic materials. The technology uses steel, CO2 and water. So there is no dependency on rare earth materials like cobalt, or lithium. This makes our technology geopolitically independent. It can be produced everywhere and it can be used everywhere. This is a very important.

Our sweet spot is the long duration market, in which power is typically stored or dispatched over a period of between four and 24 hours. This market is potentially very big and aims to store solar energy captured during daylight hours to use after sunset.


Innovations like this will make energy transition much easier to achieve by 2050.