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-MoO<SUB>3</SUB> 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 MoO<SUB>3</SUB> layers. The room-temperature conductivity for the PEDOT-MoO<SUB>3</SUB> composite is found to be 1.82×10<SUP>−1</SUP> S cm<SUP>−1</SUP>, which is four orders of magnitude higher than that of the pristine oxide (3.78×10<SUP>−5</SUP> S cm<SUP>−1</SUP>). The enhanced double-layer capacitance of the PEDOT-MoO<SUB>3</SUB> nanocomposite (~300 F g<SUP>−1</SUP>) compared to that (~40 mF g<SUP>−1</SUP>) of pristine MoO<SUB>3</SUB> is attributed to higher electronic conductivity, enhanced bidimensionality, and increase in surface area of the nanocomposite