Еlectrochemical properties of poly-3,4-ethylenedioxythiophene:polystyrene sulfonate/manganese dioxide composite electrode material

Abstract

Electrochemical properties of a composite material based on PEDOT:PSS and MnO 2 were investigated. The composite was synthesized by spontaneous redox reaction between reduced fragments of PEDOT:PSS (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)) and permanganate ions. PEDOT:PSS/MnO 2 composite dispersion can be drop-cast both on rigid and flexible, conducting and non-conducting substrates. Electrochemical studies of PEDOT:PSS/MnO 2 electrodes were performed in 0.1 M LiClO 4 aqueous electrolyte. The specific capacity values of the composite were 46 and 33 F g −1 at 10 and 50 mV s −1 , respectively. Capacity retention after 1000 galvanostatic charge-discharge cycles was 73 %. The morphology of the material was investigated by SEM; the oxidation state of manganese in oxide was characterized by XPS.

A Review of MnO2 Composites Incorporated with Conductive Materials for Energy Storage

“…With a longer deposition time, more MnO 2 precipitates on the PEDOT film (Figure 12c–e), and it was found that the composites exhibited higher specific capacitance and better recyclable properties. By spontaneous redox reactions between the reduced fragment of PEDOT:PSS and MnO 4 − , [78] the composite of MnO 2 @PEDOT:PSS also can be achieved. In addition to the redox method, electrodeposition is another one of the most used methods.…”

“…À , [78] the composite of MnO 2 @PEDOT:PSS also can be achieved. In addition to the redox method, electrodeposition is another one of the most used methods.…”