Porous WO/graphene/polyester textile electrode materials with enhanced electrochemical performance for flexible solid-state supercapacitors.

In this work, a flexible and porous WO/grapheme/polyester (WO/G/PT) textile electrode was successfully prepared by in situ growing WO 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 WO exposed enhanced electrochemically active surface area and the hierarchically porous structure improved the electrolyte ion diffusion rate. The optimized WO/G/PT textile electrode exhibited good electrochemical performance with a high areal capacitance of 308.2mFcm at a scan rate of 2mVs and excellent cycling stability. A flexible asymmetric supercapacitor (ASC) device was further fabricated by using the WO/G/PT electrode and G/PT electrode, which exhibited a good specific capacitance of 167.6mFcm and high energy density of 60μWhcm at the power density of 2320 μWcm.