Exploring the influence of Ni doping thin films for supercapacitor application

This study explores the impact of nickel (Ni) doping bismuth ferrite (BiFeO₃) thin film synthesis by spray pyrolysis method. The structural and morphological study shows that the thin films are slightly amorphous with granular morphology. Investigated the supercapacitive behavior of synthesized material by using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The thin films synthesized are capable of storing a 253.31 F/g capacitance at a 10 mV/s scan rate and by introducing nickel into the synthesis process, we obtained 312.12 F/g capacitance at a 10 mV/s scan rate. The material shows good cyclic stability after 91000 cycles. It is also observed that no structural and morphological changes were made by doping Ni into BiFeO₃ thin films. The significant improvement in capacitance was displayed by Ni doping into BiFeO₃ obtained via spray pyrolysis methods indicating its potential for use in supercapacitor applications.