Mescoporous Nickel Titanate–Titanium Oxide Complex Material for Enhanced Energy Storage Application
Love Bansal, Chanchal Rani, Tanushree Ghosh, Suchita Kandpal, Sandeep Chhoker, Manushree Tanwar, Rajesh Kumar
Abstract
Materials need to be engineered to make them device-ready. A mescoporous, a combination of meso- and microporous, nickel titanate–titanium oxide (m-NTTO) complex has been synthesized here using a simple sol–gel method for making a solid-state binder-free supercapacitor from the as-prepared powder. The m-NTTO sample, well characterized using electron microscopy, N 2 adsorption–desorption isotherm, X-ray diffraction, and Raman spectroscopy was tested for its energy storage capabilities. The supercapacitive performance of m-NTTO is investigated through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge–discharge (GCD). It shows a dominant electric double-layer capacitance with a total specific capacitance of 195 F/g at 10 mV/s and fast charging and slow discharging. Additionally, it exhibits high specific capacitance, excellent cyclic stability, and high retention. Using this sample, a prototype solid-state symmetric supercapacitor device has been fabricated to demonstrate excellent electrochemical performance with high specific capacitance, energy density, and power density was obtained, which suggests that the m-NTTO is suitable candidate material for energy storage application.