High-performance rGO@CNTs@AgNbS nanocomposite electrode material for hybrid supercapacitor and electrochemical glucose sensor

Due to its outstanding ability to store energy, the hybrid energy storage system known as the supercapattery has attained a lot of attention. These devices give extraordinary power and energy densities than supercapacitors and batteries. In this research, a hydrothermal method is used to synthesize a composite material with equal amounts of both components (a 50/50 weight ratio) of silver niobium sulfide and doped with rGO@CNT. Its potential is evaluated using a variety of electrochemical investigations, including galvanostatic charge-discharge and cyclic voltammetry measurements. The rGO@CNT@AgNbS is considered the most attractive material for electrodes based on the electrochemical analysis results, with a specific capacity of 2750 C/g. Additional investigations, including cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), XRD, SEM, and a 15000-cycle stability test, are carried out to better understand this asymmetric device. The device displayed a significant energy density of 65 Wh kg-1 and a fantastic power density of 2229 W /k g . Besides, the composite devices are used as an electrochemical glucose sensor to detect glucose. The device showed an extraordinary sensitivity (greater than 95%) up to a small level of glucose. This study demonstrates the excellent achievement of composite rGO@CNT@AgNbS electrodes for supercapattery applications, with tremendous power and energy densities.