MnOx decorated CeO2 nanorods as cathode catalyst for rechargeable lithium-air batteries

An efficient catalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is the most critical factor influencing the performance of lithium-air batteries. We present MnOx decorated CeO2 nanorods as a highly active cathode catalyst for lithium-air batteries fabricated via an in-situ redox reaction. Lithium-air batteries based on MnOx@CeO2 catalysts show enhanced electrochemical performances, including high first discharge specific capacity (2617 mA h g(-1) at 100 mA g(-1)), low overpotential, good rate capability (up to 400 mA g(-1)), and cycle stability (only 1.1% voltage loss after 30 cycles of specific capacity limit of 1000 mA h g(-1) tested at 200 mA g(-1)). The improved performance might be attributed to the high catalyst efficiency.