Electrochemical Self-Assembly of 3D Interpenetrating Porous Network PEDOT-PEG-WS2 Nanocomposite for High-Efficient Energy Storage

Like interchange bridges used in traffic, 3D interpenetrating porous network (3D IPN) nano-/micro materials are of great significance in the field of energy storage. Here, we developed a 3D IPN poly(3,4-ethyleenedioxythiophene)-poly(ethylene glycol)-WS2 (PEDOT-PEG-WS2) nanocomposite through the electrochemical self-assembly of EDOT and WS2 nanosheets with assistance of PEG. The SEM, EDS and XPS results explicitly demonstrated the formation of 3D IPN PEDOT-PEG-WS2 nanocomposite. The electrochemical results indicated that the PEDOT-PEG-WS2 nanocomposite had high specific capacitance of 236.5 mF cm-2 at 5 mV s-1, which was about 3.1 times higher than PEDOT-PEG (77.5 mF cm-2). The symmetric supercapacitors based on PEDOT-PEG-WS2 presented a high specific energy of 78 Wh m-2 at 900 W m-2 and high cycle stability of 91% after 5000 cycles. It was proposed that the enhanced performance were attributed to the unique 3D IPN structures and the synergistic effect between WS2 and PEDOT, which made them promising candi...