Synthesis, Structural Characterization, and Electrochemical Analysis of La-Sr Doped NiO3 Perovsikte for Energy Storage Applications

The increasing demand for efficient energy storage systems has accelerated research into advanced electrode materials that can balance high energy and power densities. In contrast, supercapacitors offer ultrafast charge-discharge cycles, high power density, and excellent cycle
life, but their low energy density hinders large-scale applications. To address this challenge,
La,Sr-doped NiO3 Perovsikte was synthesized via a controlled co-precipitation route, followed
by thermal treatment to achieve optimized crystallinity and morphology. The co-doping
strategy improves electrical conductivity, redox activity, and structural stability, thereby
enhancing electrochemical performance. Structural analysis XRD, FTIR, SEM- EDAX, BЕT
and XPS is underway to validate functional groups, morphology, and elemental states.
Electrochemical performance was assessed in alkaline electrolyte using cyclic voltammetry
(CV), galvanostatic charge-discharge (GCD), electrochemical impedance spectroscopy (EIS.
The optimized La, Sr-doped NiO3electrode demonstrated high specific capacitance, excellent
rate capability, and superior cycling stability, retaining over 90% of capacitance after 10,000
cycles. Reduced charge-transfer resistance and enhanced ion transport highlight the synergistic
role of La-Sr substitution in improving conductivity and electrochemical kinetics.