Nanocrystalline Barium Nickel Titanate (Ba2NiTi5O13) nanoparticles were successfully synthesised via simple solution combustion method and carried out for various characterisation techniques such as XRD, UV–DRS, SEM, EDAX, TEM and XPS were employed. The XRD results indicated that the synthesised sample was highly crystalline and in a single-phase form, with a crystallite size of 33 nm (Debye–Scherrer analysis) and 36.77 nm (Williamson–Hall analysis), respectively. The morphological investigations showed that the nanostructure is porous and has wrinkled surfaces with well-dispersed particles. Synthesized BNT was used to pencil graphite electrode (BNT/PGE) in order to detect electrochemical tartrazine (TZ) using cyclic voltammetry. The modified electrode exhibited enhanced electrocatalytic activity with a low limit of detection (LOD) of 0.41 µM and limit of quantification (LOQ) of 1.39 µM, outstanding sensitivity and an electron transfer behavior that was adsorption- controlled. The sensor was able to simultaneously detect the sunset yellow (SY) and tartrazine. The electrochemical impedance spectroscopy (EIS) and galvanostatic charge–discharge (GCD) analyses showed low charge-transfer resistance, good ion diffusion characteristics and a high specific capacitance of 337.21 Fg-1 at 0.5 Ag-1 with excellent cycling stability. Based on these results, BNT is a promising multifunctional material for electrochemical sensing and energy storage applications.