▎ 摘　　要

NOVELTY - Preparing a triboelectric nanogenerator based on a three-dimensional multilayer film structure composite electrode, comprises (i) performing laser etching on the polyimide film to obtain a laser-induced graphene electrode, (ii) mixing a polydimethylsiloxane base solution and a curing agent, performing magnetic stirring to prepare a polydimethylsiloxane solution, mixing the solution A and solution B, stirring to prepare an Ecolflex solution, mixing a polydimethylsiloxane solution and an Ecolflex solution, performing magnetic stirring to obtain a mixed silicone rubber solution, and vacuumizing the mixed silicone rubber solution to remove bubbles, (iii) scraping the mixed silicon rubber solution removing bubbles on laser induced graphene electrode of the polyimide film, carrying out vacuum treatment in a vacuum drying oven, drying and curing to obtain a composite silicon rubber substrate, where the laser-induced graphene electrode is transferred to the composite silicon rubber substrate, USE - The method is useful for preparing a triboelectric nanogenerator based on three-dimensional multilayer film structure composite electrode. ADVANTAGE - The method: solves the defect that the laser induced graphene electrode is transferred to the composite silicon rubber substrate; relieves the laser induced graphene electrode under the tensile deformation of electric performance deterioration; and the obtained product has excellent tensile stability and large electrode square resistance value. DETAILED DESCRIPTION - Preparing a triboelectric nanogenerator based on a three-dimensional multilayer film structure composite electrode, comprises (i) performing laser etching on the polyimide film to obtain a laser-induced graphene electrode, (ii) mixing a polydimethylsiloxane base solution and a curing agent according to the volume ratio of 10:1, performing magnetic stirring to prepare a polydimethylsiloxane solution, mixing the solution A and the solution B in a volume ratio of 1:1, magnetically stirring to prepare an Ecolflex solution, mixing a polydimethylsiloxane solution and an Ecolflex solution according to the volume ratio of 1:1, performing magnetic stirring to obtain a mixed silicone rubber solution, and vacuumizing the mixed silicone rubber solution to remove bubbles, where the Ecolflex solution is an aromatic random copolyester solution, (iii) uniformly scraping the mixed silicon rubber solution removing bubbles on the laser induced graphene electrode of the polyimide film, then carrying out vacuum treatment in a vacuum drying oven, drying and curing to obtain a composite silicon rubber substrate, where the laser-induced graphene electrode is transferred to the composite silicon rubber substrate, (iv) pre-stretching a composite silicon rubber substrate, uniformly spraying a silver nanowire solution on a laser-induced graphene electrode in a pre-stretched state, forming a silver nanowire film on the laser-induced graphene electrode, forming an Ag NWs/LIG composite electrode in a three-dimensional multilayer film structure on the composite silicon rubber substrate and then removing the pre-stretching force, (v) uniformly spin-coating a solution for preparing the negative friction electric layer on the glass plate, heating and curing to obtain a negative friction electric layer film, taking down the negative triboelectric layer film from the glass plate and sticking the negative triboelectric layer film to the Ag NWs/LIG composite electrode, (vi) placing the cut fabric into an absolute ethyl alcohol solution for ultrasonic treatment and drying the fabric after the ultrasonic treatment, using the dried fabric as a positive triboelectric layer and arranged opposite to a negative triboelectric layer, where in the step (v), the negative friction electric layer film is a pure PDMS film, a PDMS/Ecoflex film or an MXene/silicone rubber composite film, and when the MXene/silicone rubber composite film is used as negative friction electric layer and the output performance of the friction nano generator is optimal.