The sluggish kinetics of the oxygen reduction/oxygen evolution reactions at the cathode limits the practical application of non-aqueous lithium-air batteries(LABs).Herein,Cu single-atom anchored on Te-N co-doped MXene(CuSA-Te/N-MXene)is developed as a catalyst for LABs.Dispersed few-layer MXene nanosheets increase the space required for storage of discharging products,while the dispersed Cu single atoms can effectively catalyze the formation and decomposition of discharging products,thereby significantly accelerating the electrochemical kinetics of redox processes.It is indicated that CuSA-Te/N-MXene cathode shows a discharge capacity as high as 16 694 mAh·g-1 at a current density of 500 mA·g-1,a charge overvoltage as low as 0.48 V at a current density of 500 mA·g-1 as well as a limited capacity of 1 000 mAh·g-1,and an excellent cycling stability that represents 425 stable cycles at a current density of 500 mA·g-1.
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