Fabrication of 1T VS₂ Electrode‐Based In‐Plane Micro‐Supercapacitor Using a Cost‐Effective Mask‐Assisted Printing Technique

Abstract

Vanadium disulfide (VS 2 ) is an important member of the transition‐metal dichalcogenides (TMDs) family, which offers high conductivity. In nature, it can exist in two phases, i.e., 1T and 2H. Herein, the metallic 1T VS 2 ‐based in‐plane micro‐supercapacitor (MSC) is fabricated by a facile‐mask‐assisted printing technique. Initially, the 1T VS 2 nanosheets are synthesized using a simple one‐pot hydrothermal route. The material characterizations have claimed the formation of a 1T phase and the density of states (DOS) reveal that the 1T phase of VS 2 is metallic in nature. After experimental and theoretical investigations of synthesized nanosheets, a VS 2 electrode‐based in‐plane MSC is fabricated using a simple mask‐assisted printing technique. The fabricated device demonstrates excellent capacitance retention of 97.6% after 1000 cycles of cyclic voltammetry measurement at a 100 mV s −1 scan rate. The device also shows an excellent areal capacitance of 212.7 mF cm −2 and a high areal energy density of 10.63 μWh cm −2 at a high‐power density of 4.45 mW cm −2 . This low‐cost and simple fabrication process can produce high‐performance in‐plane MSC devices.