The supercapattery designed with a binary composite of niobium silver sulfide (NbAg2S) and activated carbon for enhanced electrochemical performance

Hirra Rafique; Muhammad Waqas Iqbal; Saikh Mohammad Wabaidur; Haseeb Ul Hassan; Amir Muhammad Afzal; Tasawar Abbas; Mohamed A Habila; Ehsan Elahi

doi:10.1039/d3ra01230a

The supercapattery designed with a binary composite of niobium silver sulfide (NbAg₂S) and activated carbon for enhanced electrochemical performance

RSC Adv. 2023 Apr 24;13(19):12634-12645. doi: 10.1039/d3ra01230a.

Authors

Hirra Rafique¹, Muhammad Waqas Iqbal¹, Saikh Mohammad Wabaidur², Haseeb Ul Hassan¹, Amir Muhammad Afzal¹, Tasawar Abbas¹, Mohamed A Habila², Ehsan Elahi³

Affiliations

¹ Department of Physics, Riphah International University, Campus Lahore Pakistan waqas.iqbal@riphah.edu.pk.
² Chemistry Department, College of Science, King Saud University Riyadh 11451 Saudi Arabia.
³ Department of Physics and Astronomy, Sejong University Seoul South Korea.

Abstract

A supercapattery is a hybrid device that is a combination of a battery and a capacitor. Niobium sulfide (NbS), silver sulfide (Ag₂S), and niobium silver sulfide (NbAg₂S) were synthesized by a simple hydrothermal method. NbAg₂S (50/50 wt% ratio) had a specific capacity of 654 C g^-1, which was higher than the combined specific capacities of NbS (440 C g^-1) and Ag₂S (232 C g^-1), as determined by the electrochemical investigation of a three-cell assembly. Activated carbon and NbAg₂S were combined to develop the asymmetric device (NbAg₂S//AC). A maximum specific capacity of 142 C g^-1 was delivered by the supercapattery (NbAg₂S//AC). The supercapattery (NbAg₂S/AC) provided 43.06 W h kg^-1 energy density while retaining 750 W kg^-1 power density. The stability of the NbAg₂S//AC device was evaluated by subjecting it to 5000 cycles. After 5000 cycles, the (NbAg₂S/AC) device still had 93% of its initial capacity. This research indicates that merging NbS and Ag₂S (50/50 wt% ratio) may be the best choice for future energy storage technologies.