Facile electrochemical synthesis of polydopamine-incorporated graphene oxide/PEDOT hybrid thin films for pseudocapacitive behaviors

• Polydopamine-functionalized grapheme oxide (PDA-GO) was incorporated into PEDOT hybrid films via simple one-pot coelectrodeposition.
• Catechol moieties in polydopamine furnished additional pseudo-capacitive behaviors.
• Specific capacitance of PDA-GO/PEDOT hybrid films showed twice as much as that of GO/PEDOT hybrid films.

We report facile synthesis of polydopamine-functionalized graphene oxide/conducting polymer hybrids as an electrode material for supercapacitors. Bio-inspired polydopamine has catechol moieties that can undergo redox transformation, which may result in extra faradic capacitance. Polydopamine-functionalized graphene oxide hybrid materials, which were easily prepared by concomitant dopamine oxidation and slight reduction of graphene oxide, showed enhanced specific capacitance when compared to bare graphene oxide hybrid materials. Although polydopamine layers slightly decreased the conductivity of the hybrid materials, extra redox reactions appeared to contribute more to the overall specific capacitance.

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