Research Progress of a New Solid Oxide Metal-Air Redox Battery for Advanced Energy Storage

This paper reviews the research progress of a new class of solid oxide metal-air redox batteries for advanced energy storage. This new type of battery is comprised of a reversible solid oxide fuel cell and pair of metal/metal-oxide redox couple. This all solid-state battery has a great potential to surpass the conventional metal-air batteries and redox flow batteries in performance and cost. The paper first discusses the working principle and key features of the new battery, followed by the theoretical analysis of various metal-air chemistries. Finally, two examples of solid oxide metal-air chemistries operated at 550°C are given to demonstrate the promising performance of this innovative battery.