Investigating the Impact of Ag Nanoparticles on N and S Co‐Doped TiO2 for Battery‐Type Supercapacitor Application

Abstract

AbstractIn this work, we demonstrate a successful synthesis of heteroatom co‐doped TiO2 decorated with Ag nanoparticles using a direct combustion approach. These materials serve as a high‐performance active layer for advanced battery‐type supercapacitors. Among all the investigated materials, N,S co‐doped TiO2 nanoparticles and Ag/N,S co‐doped TiO2 nanocomposite exhibited impressive specific capacitances of 360 and 480 F g−1 at a current density of 1 A g−1. Moreover, we employed Ag/N,S co‐doped TiO2 nanocomposite as symmetric supercapacitor in a wide potential window of −1 to 1 V. The symmetric device demonstrated a specific capacitance of 183 F g−1 at 3 A g−1 with an energy density of 105 Wh kg−1 at a power density of 6 kW kg−1. One of the most promising aspects of this study was the high cyclic stability of the device, with capacity retention of 80 % when tested for 3000 discharge cycles at 3 A g−1.The improved electrochemical performance of Ag nanoparticle decorated N,S co‐doped TiO2 structure confirms the synergistic behavior of each component in the nanocomposite. These results indicate the remarkable durability of the device. Additionally, the materials used in this work are environmentally friendly, making them attractive candidates for battery‐type supercapacitors.