 This study has demonstrated the potential of FeMOO garnet cathodes as an effective catalyst for lithium-air batteries. The garnet structure of FeMOO allows for high catalytic activity and long-term stability while maintaining structural integrity. This catalyst also exhibited superior performance compared to other catalysts tested with a cycle life of over 1800 hours under half-sealing conditions. Additionally, the FeMOO catalyst was able to effectively reduce the amount of carbon dioxide produced during the decomposition of lithium carbonate, which is known to cause anode corrosion. These results suggest that FeMOO garnet cathodes have great potential for use in lithium-air batteries. This article was authored by Yang Zhou, Gao Yanli, Huaman Zhou, and others.