All-Solid-State\nFlexible Supercapacitors Based on Highly Dispersed Polypyrrole Nanowire and Reduced Graphene Oxide\nComposites

Abstract

Highly dispersed polypyrrole nanowires\nare decorated on reduced graphene oxide sheets using a facile in situ\nsynthesis route. The prepared composites exhibit high dispersibility,\nlarge effective surface area, and high electric conductivity. All-solid-state\nflexible supercapacitors are assembled based on the prepared composites,\nwhich show excellent electrochemical performances with a specific\ncapacitance of 434.7 F g^–1 at a current density\nof 1 A g^–1. The as-fabricated supercapacitor also\nexhibits excellent cycling stability (88.1% capacitance retention\nafter 5000 cycles) and exceptional mechanical flexibility. In addition,\noutstanding power and energy densities were obtained, demonstrating\nthe significant potential of prepared material for flexible and portable\nenergy storage devices.