▎ 摘　　要

NOVELTY - The method involves preparing a lithium ion conducting protective film (100); disposing a lithium conducting electrolyte between an anode comprising lithium and an oxygen gas diffusive cathode; and disposing the lithium ion conducting protective film between the anode and the electrolyte. The method for preparing the lithium ion conducting protective film involves providing a lithium anode protective layer comprising a graphene oxide layer; providing a lithium ion conductive layer; and introducing a cross-linking component to cross-link between the lithium anode protective layer and the lithium ion conductive layer of the lithium ion conducting protective film. USE - Method for preparing a lithium-air electrochemical cell. ADVANTAGE - The protective film provides lithium ion conductivity across the film, prevents degradation of the lithium anode and inhibits lithium dendrite growth in the electrochemical cell. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of layer-by-layer lithium ion conducting protective barrier. 100Lithium ion conducting protective film 105Substrate 110First PEO layer 115Graphene oxide (GO) layer 120Second PEO layer 125PAA layer 130Tetralayers