TiO2 /g-C3 N4 Composite Electrodes for All-SolidState Supercapacitor Applications

Abstract

Research on supercapacitors has recently shifted its attention to the development of low-cost electrode materials with long-cycle stability. It has been thought that titanium dioxide, an important semiconductor material with strong chemical stability and a low cost, is a potential material for capacitors1 . During charging and discharging processes, TiO2 frequently exhibits poor electrical conductivity and agglomeration2 . The overall strategy is to combine conductive carbon-based materials to create hybrid materials to improve their performance3 . g-C3 N4 is a stable allotrope of C3 N4 and it has been gaining more attention for some time. This material is a good alternative for building hybrid systems, and it has optical, electrical, and structural properties that make it a multi-functional material4 and enhances the performance of supercapacitors5 . TiO2 /C3 N4 hybrid material created in this study using an effective, inexpensive, and simple thermal process and utilized as supercapacitor electrodes by using aqueous LiCl/PVA electrolyte. Supercapacitor has shown specific capacitance, power density, and Coulombic efficiency as high as 20.6F.g1, 63Wh.kg-1 and 92% respectively. TiO2 /C3 N4 hybrid materials outperform TiO2 in terms of electrochemical performance.