Overview
- Researchers at the Chinese Academy of Sciences reported an all-iron flow battery that completed more than 6,000 charge–discharge cycles with no capacity decay, as detailed in Advanced Energy Materials.
- The team credits a redesigned iron complex that tackles two chronic issues in iron flow systems: material degradation and ion crossover.
- Long-cycle tests produced no harmful byproducts and showed about 99.4% leak resistance, according to the research team’s reported data.
- Iron costs far less than lithium, which suggests a path to lower prices for utility-scale storage if this design can be built at scale.
- Key next steps include independent replication, pilot manufacturing, and safety and grid-integration testing, as the battery market shifts to multiple chemistries with Chinese firms playing a central role.