▎ 摘　　要

NOVELTY - A continuous phase asymmetric porous graphene oxide film, comprises a first sub-layer and a second sub-layer arranged in a stack. The second sub-layer is formed of graphene oxide, and the first sub-layer is formed of reduced graphene oxide. USE - Continuous phase asymmetric porous graphene oxide film of nanogenerator (claimed). ADVANTAGE - The porous graphene oxide film has high mechanical strength, strong power generation capability and excellent stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) Preparation of continuous phase asymmetric porous graphene oxide film, involves (1) providing a graphene oxide foam and (2) subjecting the graphene oxide foam to a laser reduction treatment; and (2) a nanogenerator comprises one substructure including a positive electrode, a power generation layer, and a negative electrode which are stacked, and the power generation layer is formed of the porous graphene oxide film.