Li Doped Nickel Ferrite/Pani Nanocomposite as an Eco-Friendly Electrode Material for Energy Storage Devices

Abstract

Recently transition metal oxides as capacitive electrodes are finding place in supercapacitor. However, low specific energy and poor electrical conductivity are main drawbacks for energy storage applications. This study introduces lithium doped nickel ferrite nanoparticles (LNF) and LNF/polyaniline (LNF/PAni) as an advanced option for application as electrodes in supercapacitors.

These nanocomposites were prepared by sol gel auto-combustion and in-situ polymerization method and characterized by XRD. The XRD pattern revealed the single phase of highly crystalline LNF nanoparticles and crystalline- amorphous nature of nanocomposite. The surface morphology is studied by FEG-SEM which shows cubic structure of LNF nanoparticles and formation of core-shell of nanocomposite. Capacitance was measured by electrochemical measurements to examine the impact of introducing PAni in ferrite nanoparticles. The specific capacitance value increased due to high conductivity of PAni.