Are flow batteries the future of energy storage?

Flow batteries are emerging as a transformative technology for large-scale energy storage, offering scalability and long-duration storage to address the intermittency of renewable energy sources like solar and wind.

Are flow batteries better than traditional lithium-ion batteries?

Flow batteries, which store energy in liquid electrolytes housed in separate tanks, offer several advantages over traditional lithium-ion batteries.

How does a flow battery work?

The team has developed a so-called flow battery which stores energy in liquid solutions. This solution modifies the molecules in electrolytes, ferrocene and viologen to make them stable, water-soluble, and stop them degrading over time. Dissolved in water, the molecules lose just one per cent of capacity for every 1,000 charging cycle.

Why are flow batteries so expensive?

Most flow batteries today use expensive polymers that can withstand the aggressive chemistry inside the battery. They can account for up to one-third of the total cost of the device. With essentially salt water on both sides of the membrane, expensive polymers can be replaced by cheap hydrocarbons.

How long does a lithium ion battery last?

Dissolved in water, the molecules lose just one per cent of capacity for every 1,000 charging cycle. The battery is non-toxic, non-corrosive and lasts for far longer than current Lithium-ion models – estimated at a decade, rather than months.

Where do flow batteries store energy?

Flow batteries store energy in liquid solutions in external tanks; the bigger the tanks, the more energy they store.