Wrapping RGO/MoO2/carbon textile as supercapacitor electrode with enhanced flexibility and areal capacitance

Abstract Simultaneously enhancing the flexibility and electrochemical performances is of great significance for flexible supercapacitors. Herein, we designed a special structural electrode, in which the optimal loading mass of MoO 2 (9.1 mg cm −2 ) was grown on carbon fibers using a facile solvothermal method, and then filtrating RGO suspension, MoO 2 coated carbon fibers were covered and interconnected by RGO film. The wrapping RGO formed a conductive network to supply more pathways for accelerating fast electron transfer, and what's more, it could prevent MoO 2 peeling from carbon fibers and alleviate electrode structure's destruction in folding process. Consequently, RGO assisted MoO 2 textile electrode exhibited ultrahigh areal capacitance (8132 mF cm -2  at 2 mV s −1 ), outstanding cycle stability (95% capacitance retention after 30000 times charge/discharge cycles at 120 mA cm −2 ) and enhanced flexible properties (90%, 85% and 77% capacitance retention after 2000, 4000 and 6000 times folding in different directions, respectively). These merits make our RGO/MoO 2 /carbon textile promising candidates for flexible supercapacitor electrodes. Besides, the approach of introducing wrapping RGO into textile electrode is believed to provide a new thought for producing superior performance flexible energy storage devices.