The AESIR project set out to create a new kind of battery that could store renewable energy more affordably and sustainably. Led by Queen’s University Belfast and supported by industry partners including Shell, GES, and Seren, the team developed a working prototype of a redox flow battery using iron instead of the more expensive, toxic and rare vanadium used in commercial systems.
This new battery design offers the same performance as existing technologies but at half the cost. It’s safe, scalable, and built to last—making it ideal for storing energy from wind and solar power. The team also created advanced software to monitor and manage the battery in real time, ensuring it runs efficiently and safely.
The project combined chemistry, engineering, and electronics to build a complete system which was successfully demonstrated at lab scale. It included 3D-printed components, precision manufacturing, and smart control systems and incorporated several innovations representing improvements over current commercial systems.
AESIR’s success adds to the potential for Northern Ireland to become a leader in sustainable energy storage. The battery could be used in homes, farms, or even in large-scale energy projects, helping to balance the electricity grid and make better use of renewable energy.
With further development, this technology could play a key role in the UK’s transition to clean energy—supporting climate goals while creating new commercial opportunities.