Wrinkled Perovskite La 0.9 Mn 0.6 Ni 0.4 O 3− δ Nanofibers as Highly Efficient Electrocatalyst for Rechargeable Li−O 2 Batteries

The design of high‐performance electrocatalysts is crucial to the capacity performance and cycle stability of Li−O 2 batteries. Herein, wrinkled perovskite La 0.9 Mn 0.6 Ni 0.4 O 3− δ nanofibers (LMN NFs) are synthesized by electrospinning method as cathode catalyst for Li−O 2 batteries. In comparison with La 0.9 Mn 0.6 Ni 0.4 O 3− δ nanoparticles synthesized by traditional sol‐gel method (LMN NPs), the batteries with the LMN NFs catalyst exhibit the larger specific discharge capacity (9397 mAh g −1 ), better cycle stability (100 cycles) and lower voltage gap (1.111 V) at a current density of 300 mA g −1 . The improvement of electrochemical performance is correlated with the structure of wrinkled nanofibers that provides abundant active sites and sufficient provision for Li 2 O 2 deposition. The research provides a highly efficient perovskite‐type electrocatalyst for rechargeable Li−O 2 batteries.