Carbon Nitride Supported Ultra-fine Bismuth Sulfide Based Supercapacitor for Low Frequency Oscillator Application

Abstract

In this study, a high temperature in-situ route is reported for the synthesis of one dimensional carbon nitride supported bismuth sulfide nanoparticles. The x-ray diffraction study confirmed the formation of orthorhombic crystal structure of bismuth sulfide with the space group of Pnma (62). The synthesized product was used as an electrode material for supercapacitor application. Electrochemical performance of the three-electrode configuration demonstrated the specific capacitance value of 190 F.g−1 at the current density 1.5 A.g−1. A symmetric supercapacitor device, fabricated using identical synthesized material, resulted a specific capacity of 101.7 mAh.g−1 at 0.02 A.g−1, with energy and power density values of 24.35 mWh.kg−1 and 186.57 W.kg−1, respectively. The symmetric device also exhibited excellent cycling stability that retained 99% of its initial capacity after 500 cycles at 0.12 A.g−1. The coin cell based symmetric supercapacitor can generate the low frequency waveform and functioned as an oscillator. Graphical Abstract