Abstract:Due to their superior theoretical energy density and low to zero emissions etc, rechargeable lithium-air batteries have attracted significant attention as promising next-generation power sources for vehicle applications. But the main challenge is the sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) on the cathode, which results in poor discharge performance and cyclability. In this work, we propose using Mn doped TiO2 as cathode catalyst to improve the electrochemical performance of lithium-air batteries. Firstly, rutile Mn-TiO2 was calcined by a facile hydrothermal treatment method. Secondly, Polyvinylidene fluoride (PVDF) was dissolved in an N-methyl-2-pyrrolidone (NMP) solvent. KB and Mn-TiO2 were mixed with a PVDF/NMP solution to fabricate a cathode slurry. The last, the cathode slurry was coated onto circular carbon paper (diameter = 15 mm) and dried at 60 ℃ 3 hours in the oven to obtain the air cathode, And the cyclic voltammetry (CV) results show that the cathode withSMn-TiO2 with KB as catalysts exhibits a higher peak current density.