A novel 1D MXene fibers-loaded metal-organic framework derived bimetallic sulfide for high-performance supercapacitors

Metal-organic frameworks (MOFs), when directly used as electrode materials, encounter issues due to their poor conductivity and low energy density, which restricts their practical application. In this work, the MXene-fibers has been obtained by treating flake Mxene with KOH solution firstly. Then, a novel composite of nanoscale one-dimensional (1D) Mxene-fibers loaded with MOFs-derived metal sulfides (Ni(Co)(3)S-4@MXene-fibers) has been synthesized. The electrochemical analysis results show that the specific capacitance of Ni(Co)(3)S-4@MXene-fibers reaches 829.4C g(-1) at 1 A g(-1). Moreover, the asymmetric device (Ni(Co)(3)S-4@MXene-fibers//AC) has an energy density of 63.3 Wh kg(-1) at a power densi ty of 850 W kg(-1). This thanks for the 1D MXene-fibers. SEM and other characterization demonstrate that the 1D MXene-fibers can not only avoid the accumulation of Ni(Co)(3)S-4, but also construct a stable structure with fast charge transfer ability. Besides, it is more conducive to the redox reaction of active substances loaded on its surface, which improves the electrochemical performance.