Fabrication of Asymmetric Supercapacitors Utilizing Sophisticated Three-Dimensional Composites

초록

Three-dimensional (3D) structured carbon nanofiber (CNF)/metal oxide/conducting polymer composites were synthesized for high-performance supercapacitors. CNFs were fabricated via carbonization of electrospun PAN/PVP fibers, then coated with SnO2 or Fe2O3 using hydrothermal treatment. An outer polypyrrole (PPy) layer was added via dispersion polymerization to form CNF/SnO2/PPy and CNF/Fe2O3/PPy structures. These materials exhibited excellent specific capacitances of 506.2 and 425.2 F g?¹, respectively. An asymmetric supercapacitor using these composites achieved 103.5 F g?¹ and 82.7% retention after 2000 cycles. The outer PPy layer prevented metal oxide detachment, enhancing stability. This study demonstrates a simple and effective strategy for fabricating stable, high-capacitance supercapacitor electrodes using sophisticated 3D nanostructures. -본 연구는 2025년도 산업통상자원부 및 산업기술기획평가원(KEIT) 연구비 지원에 의한 연구임(RS-2022-00156073). Keywords: Three-dimensional, Electrospinning, Hydrothermal, Polymerization, Supercapacitor electrode.