Hierarchical Pore Engineering by Graphene Nanoscroll for All-Solid-State Fiber Supercapacitors

Abstract

In the burgeoning field of flexible energy storage, creating resilient and efficient supercapacitors suitable for integration into wearable technology remains a formidable challenge. This paper introduces the hybrid fiber supercapacitors based on the reduced graphene oxide (rGO) and the scrolled reduced graphene oxide (SrGO). The unique 1-D morphology of SrGO addresses the limited dispersibility of graphene components, benefiting the wet-spinning process and performance of supercapacitor application. The SrGO provides hierarchical pore structures to rGO/SrGO hybrid fiber composed of the open pores of SrGO and the interconnected pores between rGO and SrGO. This structural enhancement translates into exceptional electrochemical attributes, including increased specific capacitance and electoral conductivity, outperforming standard graphene-based fibers. Furthermore, we demonstrate the mechanical robustness of these hybrid fibers, maintaining their electrochemical integrity under dynamic bending conditions, a breakthrough feature for wearable applications. The successful interlacing of these supercapacitors into functional textiles, offering versatility in energy storage parameters, represents a significant advancement in smart textiles.