pps proceeding - Abstract Preview
pps proceeding
Symposium: S03 - Nanotechnologies and nanomaterials
Oral Presentation
 
 

Asymmetric Supercapacitor Electrode designed with NiCo2O4 Nanoneedle Arrays Cathode and TiO2-C Nanorod Anode on Carbon Cloth

Naseem Saba (1), Wu Chang Mou (1)*, Imae Toyoko (1), Huang Chien-Yao (2)

(1) National Taiwan University of Science and Technology - Taipei - Taiwan, (2) National Taiwan University of Science and Technology - Taipei - Taiwan

A flexible asymmetric Supercapacitor (ASC) based on NiCo2O4 nanoneedle arrays has been synthesized on carbon cloth by a facile hydrothermal method and subsequently TiO2/Carbon nanorods were grown on carbon cloth by two step hydrothermal process with post annealing treatment. An asymmetric Supercapacitor consisting of positive electrode based on pure pseudocapacative and negative electrode based on electric double layer capacitive behaviour, with wide operational potential window leading to enhancement in the energy density comparative to symmetric double layer-supercapacitor. In such ASC design, NiCo2O4 and TiO2/Carbon acts as cathode and anode respectively, react with KOH electrolyte to store energy. Strategy have been focussed to improve the electrical conductivity of TiO2 by coating carbon further throughout the TiO2 layer which have boosted storage capability of TiO2 based hybrids. The electrochemical properties of the supercapacitor electrodes was investigated by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy via three electrode configuration and two electrode cell. All electrochemical measurements were carried out at room temperature using electrochemical workstation. Therefore, this novel strategy for designing new type of electrode material will offer keen interest in the field of ASC application.