▎ 摘　　要

NOVELTY - Preparing high-capacity MXene composite fiber electrode material comprises (a) preparing Ti3C2TxMXene dispersion and graphene oxide dispersion, mixing two dispersions in specific and dispersing uniformly, adding conductive polymer dispersion and reducing agent ascorbic acid, stirring and ultrasonically processing; (b) filling precursor dispersion into a syringe, injecting into a hollow glass capillary at a constant speed, sealing both ends, hydrothermally reacting, self-assembling Ti3C2TxMXene, GO and conductive polymer in hydrothermal process, partially reducing GO to reduced graphene oxide (rGO) by ascorbic acid to obtain MXene composite hydrogel fibers; and (c) placing MXene composite hydrogel fiber vertically into cold source with temperature difference along radial direction around it, making ice crystals in the MXene composite hydrogel fiber grow along radial direction of the fiber, and freeze-drying to obtain MXene composite airgel fiber with radial channel structure. USE - The electrode material is useful in the super capacitor (claimed). ADVANTAGE - The method provides MXene composite fiber electrode material with high capacity, belonging to technical field of energy material, and exhibits good electrochemical performance, and high quality specific capacity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for high-capacity MXene composite fiber electrode material prepared by the above method.