ReS₂: A High-Rate Pseudocapacitive Energy\nStorage Material

Abstract

Transition-metal\ndichalcogenides have attracted exceptional attention\nin the field of energy storage such as lithium-ion batteries and supercapacitors\nbecause of their unique electronic, optical, and mechanical properties.\nIn this work, we synthesized rhenium disulfide (ReS₂) on\nhigh-throughput, electronics industry-standard, screen-printed electrodes\n(SPEs) to use as an electrode material for supercapacitor application.\nThe ReS₂ nanoparticles were grown by a room-temperature,\naqueous-solution-based electrochemical deposition method, which is\ncapable of parallel modification of SPEs. The topographic detail and\nelectrochemical activity of the sample surface were characterized\nby a spatial electroanalytical mapping technique known as scanning\nelectrochemical microscopy. The charge storage kinetics are appraised\nwith deep insight following diffusion-controlled and capacitive-like\nmechanisms. The ReS₂-coated SPE displayed a promising specific\ncapacitance of 156 mF cm^–2 at a current density\nof 1.6 mA cm^–2, which shows that ReS₂ can be used as a potential pseudocapacitive material in supercapacitors.