Preparation and Capacitive Performance Study of Graphene/Carbon Nanotubes

Graphene and carbon nanotubes, as representatives of novel carbon materials, have demonstrated immense application potential in the field of energy storage owing to their distinctive structures and excellent physicochemical properties. Graphene boasts high electrical conductivity, a large specific surface area, and favorable mechanical properties, while carbon nanotubes are renowned for their high aspect ratio and outstanding electrical performance. Combining the two not only enables the utilization of their respective advantages but also further enhances the comprehensive performance of the material through a synergistic effect. As a highly efficient energy storage device, the performance of a supercapacitor largely depends on the characteristics of the electrode material. The graphene/carbon nanotube composite material, with its large specific surface area, excellent electrical conductivity, and good electrochemical stability, emerges as an ideal choice for supercapacitor electrode materials. This paper investigates the preparation methods of graphene/carbon nanotubes and their capacitive performance, which not only contributes to a profound understanding of the structure-property relationship of the material but also provides theoretical basis and technical support for the development of high-performance supercapacitors.