China unveils ultra-cheap ‘all-iron flow battery’ for renewable energy storage
Iron costs 80x less than lithium, with record cycle stability.
Researchers from the Institute of Metal Research under the Chinese Academy of Sciences (CAS) have unveiled a breakthrough all-iron flow battery that promises ultra-low cost and record lifespan for large-scale energy storage. The team developed a highly stable electrolyte capable of sustaining thousands of charge-discharge cycles with virtually no capacity loss, a record performance in the field. The findings were published online in the journal Advanced Energy Materials on April 16.
This innovation directly tackles the critical bottleneck of storing intermittent power from solar and wind farms at grid scale. Iron costs over 80 times less than lithium as a raw industrial material, making this battery significantly cheaper than current lithium-based alternatives. The institute stated that the battery offers a low-cost, long-life solution for large-scale energy storage, potentially accelerating the global energy transition by making renewable energy storage economically viable.
- All-iron flow battery uses iron, which costs 80x less than lithium.
- Record performance: thousands of cycles with virtually no capacity loss.
- Developed by Chinese Academy of Sciences, published in Advanced Energy Materials.
Why It Matters
This could drastically cut grid storage costs, removing a key barrier to renewable energy adoption.