▎ 摘　　要

NOVELTY - Preparing stretchable MXene/graphene composite electrode involves (a) preparing a Polyvinyl alcohol (PVA) film as a transfer substrate by an electrostatic spinning process; (b) stirring and ultrasonically treating MXene dispersion liquid (c) transferring the single-layer graphene grown on the copper foil to the MXene film in a wet transfer printing mode; (d) preparing a template with a nano columnar microstructure, coating polymer liquid on the surface of the template; (e) transferring the MXene/graphene electrode obtained to the pre-stretched extensible polymer obtained and dissolving the PVA transfer substrate on the surface by using water; (f) releasing the stress after the transfer printing to form a folded structure, and finally obtaining the MXene/graphene composite electrode with an enhanced folded microstructure, namely the stretchable MXene/graphene composite electrode. USE - Method for preparing stretchable MXene/graphene composite electrode. ADVANTAGE - The method provides stretchable MXene/graphene composite electrode with high efficient friction generating effect. The method has strong commonality, easy popularization, low manufacturing cost, and simple operation. The composite electrode improves the friction area and friction effect, and effectively enhances the friction power generation effect. DETAILED DESCRIPTION - Preparing stretchable MXene/graphene composite electrode involves (a) preparing a Polyvinyl alcohol (PVA) film as a transfer substrate by an electrostatic spinning process; (b) stirring and ultrasonically treating MXene dispersion liquid with the concentration 1-20 mg/mL, and preparing MXene film on a vacuum filtration device by taking the transfer printing substrate as a filter membrane in a suction filtration manner; (c) transferring the single-layer graphene grown on the copper foil to the MXene film in a wet transfer printing mode, and forming an MXene/graphene electrode through Vander Waals force; (d) preparing a template with a nano columnar microstructure, coating polymer liquid on the surface of the template, and heating and curing to form an extensible polymer with a nano root system microstructure; (e) transferring the MXene/graphene electrode obtained to the pre-stretched extensible polymer obtained and dissolving the PVA transfer substrate on the surface by using water; (f) releasing the stress after the transfer printing to form a folded structure, and finally obtaining the MXene/graphene composite electrode with an enhanced folded microstructure, namely the stretchable MXene/graphene composite electrode. An INDEPENDENT CLAIM is included for an MXene/graphene composite electrode, which is prepared by the preparation method.