Tailoring Oxygen Reduction Reaction Kinetics on Perovskite Oxides via Oxygen Vacancies for Low‐Temperature and Knittable Zinc–Air Batteries

Abstract High kinetics oxygen reduction reaction (ORR) electrocatalysts under low temperature are critical and highly desired for temperature‐tolerant energy conversion and storage devices, but remain insufficiently investigated. Herein, oxygen vacancy‐rich porous perovskite oxide (CaMnO 3 ) nanofibers coated with reduced graphene oxide coating (V‐CMO/rGO) are developed as the air electrode catalyst for low‐temperature and knittable Zn–air batteries. V‐CMO/rGO exhibits top‐level ORR activity among perovskite oxides and shows impressive kinetics under low temperature. Experimental and theoretical calculation results reveal that the synergistic effect between metal atoms and oxygen vacancies, as well as the…

• NN
  National Natural Science Foundation of China

  Awards: 22075141, 22101132
• GO
  Government of Jiangsu Province

  Award: BK20220039
• NS
  National Synchrotron Radiation Research Center
• FR
  Fundamental Research Funds for the Central Universities

  Award: kfjj20180605