Three-Dimensional\nPrinting of Polyaniline/Reduced\nGraphene Oxide Composite for High-Performance Planar Supercapacitor

Abstract

We\napply direct ink writing for the three-dimensional (3D) printing\nof polyaniline/reduced graphene oxide (PANI/RGO) composites with PANI/graphene\noxide (PANI/GO) gel as printable inks. The PANI/GO gel inks for 3D\nprinting are prepared via self-assembly of PANI and GO in a blend\nsolvent of <i>N</i>-methyl-2-pyrrolidinone and water, and\noffer both shaping capability, self-sustainability, and electrical\nconductivity after reduction of GO. PANI/RGO interdigital electrodes\nare fabricated with 3D printing, and based on these electrodes, a\nplanar solid-state supercapacitor is constructed, which exhibits high\nperformance with an areal specific capacitance of 1329 mF cm^–2. The approach developed in this work provides a simple, economic,\nand effective way to fabricate PANI-based 3D architectures, which\nleads to promising application in future energy and electric devices\nat micro-nano scale.