Effect of monovalent ion electrolyte on energy storage mechanism of nanocomposites TiO2@CNTs

Abstract

Electrolyte plays the vital role of carrying ions in the operation of chemical power sources. In this work, the lithium, sodium and posstasium-based aqueous electrolytes were performed in the supercapacitor using nano TiO2 electrode. The anataste phase TiO2 was prepared via sol-gel route, which were charaterized by Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), Thermogravimetric analysis (TGA), and Raman. The electrochemical behaviors were conducted by cyclic voltammetry and charge-discharge cycling test. Electrochemical results showed TiO2@CNTs exhibited the pseudocapacitor behavior through the quasi-rectangle voltammetry, the maximum capacity achived using Li2SO4 1M is 245 F/g and Na2SO4 1M is 168 F/g at scan rate of 5 mV/s.