Enhancement of double-layer capacitance behavior and its electrical conductivity in layered poly (3, 4-ethylenedioxythiophene)-based nanocomposites

In this letter, we report on the enhanced double-layer capacitance of a layered poly (3, 4-ethylene dioxythiophene) PEDOT- Mo O 3 nanocomposite, which has been synthesized by a novel microwave irradiation method. The x-ray photoelectron spectroscopy analysis shows the changes in electron density and the shift in binding energy suggesting charge transfer from sulfur atoms upon PEDOT intercalation between Mo O 3 layers. The room-temperature conductivity for the PEDOT- Mo O 3 composite is found to be 1.82 × 10 − 1 S cm − 1 , which is four orders of magnitude higher than that of the pristine oxide ( 3.78 × 10 − 5 S cm − 1 ) . The enhanced double-layer capacitance of the PEDOT- Mo O 3 nanocomposite ( ∼ 300 F g − 1 ) compared to that ( ∼ 40 mF g − 1 ) of pristine Mo O 3 is attributed to higher electronic conductivity, enhanced bidimensionality, and increase in surface area of the nanocomposite.