Solid Oxide Iron-Air Battery for Long-Duration Energy Storage: A Study on Reduction Kinetics of Energy Storage Material Fe-ZrO₂ Catalyzed by Ir Particles

Long duration electricity storage (LDES) with 10+ hour cycle duration is an economically competitive option to accelerate the penetration of renewable energy into the utility market. Unfortunately, none of the available energy storage technologies can meet the LDES’ requirements for duration and cost. We here report a focused kinetic study on Fe-oxide reduction process, which is a key step for solid oxide iron-air battery; the latter has been recently demonstrated as a LDES compatible battery. The study clearly shows that Ir is an excellent catalyst to boost the sluggish Fe-oxide reduction kinetics.