▎ 摘　　要

NOVELTY - The preparation method involves dissolving (S10) the electrochemically polymerized monomer and the flexible reinforcement in a solvent to obtain an electrolyte. The electrode system is constructed (S20), the electrolyte is added to the electrode system, so that an electrolysis reaction is performed, a flexible composite film is formed on the surface of the working electrode, and a flexible composite electrode is obtained by separation. A conductive agent is added to the electrolyte. The electrochemically polymerized monomer is selected from pyrrole, aniline, and thiophene. The flexible reinforcement is selected from titanium carbide, graphene, carbon nanospheres, and carbon nanotubes. The conductive agent is selected from sodium benzenesulfonate, sodium p-toluenesulfonate, sodium dodecylsulfonate, and sodium dodecylbenzenesulfonate. USE - Preparation method of flexible composite electrode for flexible energy storage device (all claimed) used in small microelectronics, and various applications such as wearable sensors, epidermal electronics and nano robots. ADVANTAGE - The method is simple, mild, and suitable for industrial large-scale production and application. The size of the prepared flexible composite electrode can be flexibly controlled, according to different application requirements, and the working electrode with corresponding size can be selected, to efficiently synthesize composite electrode with excellent flexibility, especially suitable for micro flexible energy storage device. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a flexible composite electrode, which includes a flexible polymer matrix and a flexible reinforcement doped in the flexible polymer matrix; and (2) a flexible energy storage device. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart illustrating a preparation method of a flexible composite electrode. (Drawing includes non-English language text) S10Step for dissolving the electrochemically polymerized monomer and the flexible reinforcement in a solvent to obtain an electrolyte S20Step for constructing the electrode system