Tailored Combination of Low Dimensional Catalysts for Efficient Oxygen Reduction and Evolution in Li–O 2 Batteries

The development of efficient bifunctional catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is a key issue pertaining high performance Li–O 2 batteries. Here, we propose a heterogeneous electrocatalyst consisting of LaMnO 3 nanofibers (NFs) functionalized with RuO 2 nanoparticles (NPs) and non‐oxidized graphene nanoflakes (GNFs). The Li–O 2 cell employing the tailored catalysts delivers an excellent electrochemical performance, affording significantly reduced discharge/charge voltage gaps (1.0 V at 400 mA g −1 ), and superior cyclability for over 320 cycles. The outstanding performance arises from (1) the networked LaMnO 3 NFs providing ORR/OER sites without severe aggregation, (2) the synergistic coupling of RuO 2 NPs for further improving the OER activity and the electrical conductivity on the surface of the LaMnO 3 NFs, and (3) the use of GNFs providing a fast electronic pathway as well as improved ORR kinetics.