Porous WO₃/graphene/polyester textile electrode materials with enhanced electrochemical performance for flexible...

In this work, a flexible and porous WO₃/grapheme/polyester (WO₃/G/PT) textile electrode was successfully prepared by in situ growing WO₃ on the fiber surface inside G/PT composite fabrics. The unique electrode structure facilitates to enhance the energy storage performance because the 3D conductive network constructed by the G/PT increase the electron transportation rate, nanotructured WO₃ exposed enhanced electrochemically active surface area and the hierarchically porous structure improved the electrolyte ion diffusion rate. The optimized WO₃/G/PT textile electrode exhibited good electrochemical performance with a high areal capacitance of 308.2mFcm^-2 at a scan rate of 2mVs^-1 and excellent cycling stability. A flexible asymmetric supercapacitor (ASC) device was further fabricated by using the WO₃/G/PT electrode and G/PT electrode, which exhibited a good specific capacitance of 167.6mFcm^-3 and high energy density of 60μWhcm^-3 at the power density of 2320 μWcm^-3.