Binary metallic sulphide‐based nanocomposites with <scp>ZnO</scp> additives: A dual‐functioning electrode material for energy storage and glucose sensing
Muhammad Imran, Mahrukh Saif Khan, Amir Muhammad Afzal, Muhammad Waqas Iqbal, Sohail Mumtaz, Mohamed A. Habila, Zubair Ahmad
Abstract
Abstract In the contemporary age, there is a growing need for innovative energy storage solutions that integrate the crucial features of supercapacitors and rechargeable batteries to meet evolving energy requirements. Herein, we used the hydrothermal method to synthesize a binary composite electrode material. The addition of ZnO as a doping material significantly enhances the specific capacity of cobalt niobium sulphide (CoNbS) from 538.16 C g −1 to 912.62 C g −1 due to its high conductivity and the presence of redox‐active sites. We have also developed a supercapattery (CoNbS@ZnO//activated carbon [AC]), which has demonstrated outstanding performance with a remarkable specific capacity of 325.92 C g −1 at a current density of 1.5 A g −1 . Furthermore, the supercapattery device shows improved energy and power densities, measuring 35 Wh/kg and 2397 W/kg, respectively. After 5000 galvanostatic charging discharging (GCD) cycles, the device shows columbic efficiency (90%) and capacity retention (83%). Additionally, the CoNbS@ZnO//AC hybrid device is used as an electrochemical sensor for glucose detection. The device showed a high sensitivity against the glucose and detected up to a small value. The synthesis of nanomaterials opens up new opportunities to create high‐performance energy related systems.