High Performance Flexible Solid-State Asymmetric Supercapacitor Composed of a Polyaniline/PEDOT/Polyaniline/Ultralarge Reduced Graphene Oxide Tetralayer Film and a PEDOT/MoS2 Composite Film

Publication date: Available online 17 August 2019Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Wai-Hwa Khoh, Boon-Hong Wee, Jong-Dal HongAbstractA flexible solid-state asymmetric supercapacitor (ASC) was assembled with a polyaniline (PANi)/PEDOT/PANi/ultralarge reduced graphene oxide (UrGO) tetralayer film (denoted as PPPrG, used as the positive electrode) and a PEDOT/MoS2 film (denoted as PMo, used as the negative electrode) on a flexible polyethylene terephthalate (PET) substrate with polyvinyl alcohol/H2SO4 gel electrolyte. The PPPrG tetralayers were fabricated on PET via a layer-by-layer self-assembly method, whereas the PMo electrode was fabricated on PET using a drop-coating approach. The ASC exhibited a maximum energy density of 5.4 mW h/cm3 at a power density of 110 mW/cm3, demonstrating excellent electrochemical performance without performance loss despite various deformation states due to high conductivity and flexibility of the multilayer film electrodes, which act as both the active electrode and the current collector. The ASC retained an energy density of 4.0 mW h/cm3 at a power density of 265 mW/cm3 with an optimized cell voltage of 0.8 V. The excellent performance of this ASC was ascribed mainly to the conductivity of the multilayer film electrodes, which was improved by the combination of PANi, UrGO and PEDOT layers, which functioned as conducting networks in the nanostructured composite films. This flexible A...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Category: Chemistry Source Type: research