Iron Batteries Emerge as Cheap Alternative to Lithium for Grid Storage
Startups are turning to iron as a battery material to provide affordable, large-scale energy storage for renewable power grids. This shift aims to avoid the supply chain issues and high costs associated with lithium-ion technology.
Renewable energy sources like wind and solar are gaining momentum in the U.S. due to upcoming legislation, but their reliance on weather conditions creates a strong need for affordable energy storage. While lithium-ion batteries currently dominate the grid-scale storage market because of their availability from EV production, their long-term viability is uncertain due to high material costs and intense supply chain competition.
German startup VoltStorage initially used vanadium-redox flow batteries for industrial energy storage, but global supply chain disruptions during the pandemic caused raw material prices to skyrocket. This volatility forced the company to pivot away from rare and expensive metals to find a more reliable and cost-effective solution for storing surplus wind and solar power.
The company now focuses on developing massive iron-based batteries to meet this demand. Iron stands out as one of Earth's most abundant elements with a robust global supply chain, making it an incredibly attractive alternative to lithium. By utilizing such common materials, VoltStorage hopes to build scalable storage systems that keep renewable energy cheap without falling into the same supply chain traps that plague the current battery industry.