Ultra-Fast and Facile Fabrication of Turbostratic Holey Graphene and Its Supercapacitor Applications

Abstract

A facile, cost-effective, and scalable method for producing turbostratic holey graphene (tHG) nanosheets has been developed using an age-old atmospheric plasma spray technique. This single-step, residue-free process originates from the hole and simultaneously induces twisting in the graphene layers. The twisting minimizes electronic interactions between the layers, increasing interlayer spacing and significantly enhancing the graphene’s effective specific surface area. The fabricated tHG electrode exhibits the highest specific capacitance of 220.4 F g^–1 at 0.5 A g^–1, an energy density of 27.54 W h kg^–1, and a power density of 225 W kg^–1 in the three-electrode system. Furthermore, the electrode exhibits outstanding electrochemical stability, retaining about 92% of its capacitance after 10,000 cycles. These characteristics position the tHG as a highly promising material for next-generation high-performance supercapacitors.