Flexible supercapacitor electrode material and preparation method thereof

The invention discloses a preparation method of a flexible supercapacitor electrode material, and the method comprises the following steps: mixing MWCNTs and TOCNFs dispersion liquid according to a certain mass ratio, assisting the MWCNTs to be uniformly dispersed in the TOCNFs dispersion liquid through ultrasound, adding a certain volume of MXene solution into the mixed solution, and enabling the three materials to be uniformly dispersed through ultrasound; and finally, carrying out vacuum-assisted suction filtration on the cellulose membrane to obtain a mixed membrane. The TOCNFs and the MWCNTs act together to inhibit self-stacking of the MXene nanosheets, meanwhile, the mechanical strength and the electrochemical performance of the thin film are improved, the prepared flexible electrode material has the tensile strain of 48.79 Mpa and has excellent electrochemical performance when being used as an electrode material of a flexible supercapacitor, and the specific capacitance reaches 501.5 F g when the