▎ 摘　　要

NOVELTY - Flexible covalent organic framework-based composite fibers, is claimed. The covalent organic framework with different structures and different electrochemical activities is synthesized by different amino monomers and aldehyde monomers, and compounding the covalent organic framework with graphene oxide, and wet spinning and reducing. USE - The flexible covalent organic framework-based composite fiber is useful in quasi-solid symmetric supercapacitor (claimed). ADVANTAGE - The composite fiber: has uniform distribution and controllable morphology, excellent electrochemical properties as electrode materials for supercapacitors, and excellent application prospect; realizes the intercalation design of reduced graphene oxide by covalent organic frameworks with pseudocapacitive properties; combines the excellent electrochemical properties of covalent organic frameworks and graphene; and improves the mechanical properties of one-dimensional electrode materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing flexible covalent organic framework-based composite fiber, comprising (i) synthesizing covalent organic frameworks with different structures and different electrochemical activities by selecting different amino monomers and aldehyde monomers, where the molar ratio of the amino monomer and the aldehyde monomer is 3-4:2, and (ii) placing aqueous graphene oxide solution and covalent organic frameworks in a closed environment with the mass ratio of 1:0.5-20, and stirring evenly to obtain spinning solution, and wet spinning in a coagulation bath, and reducing to obtain final product.