▎ 摘　　要

NOVELTY - Preparing lithium-oxygen battery involves providing a lithium anode, an air cathode comprising reduced graphene oxide, and an electrolyte comprising an ether solvent, benzonitrile, and a lithium salt forming an electrochemical cell, and cycling the electrochemical cell to form a coating of red poly(benzonitrile) on a portion of the lithium anode. USE - Method for preparing lithium-oxygen battery. ADVANTAGE - The method improves battery performance and enhances cycle life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of forming an iridium or rhodium catalyst on an air cathode, which involves: heating a reduced graphene oxide impregnated with iridium (cyclooctadiene)(acetylacetonate) (or Rh(COD)(acac)) in the presence of hydrogen to decompose the Ir(COD)(acac) (or Rh(COD)(acac)) and form iridium or rhodium particles on the reduced graphene oxide to form the air cathode.