<p>The increasing global demand for sustainable energy solutions necessitates the development of efficient energy storage systems. Sodium-ion batteries (SIBs) offer a viable alternative to conventional lithium-ion batteries (LIBs) owing to the abundance and cost-effectiveness of sodium. This study focuses on the solvothermal synthesis, structural characterization, and electrochemical performance of sodium iron phosphate (NaFePO₄) or NFP as a cathode material for SIBs. NFP was synthesized using a novel approach though the solvothermal synthesis method, tailored to enhance its electrochemical properties. Unlike existing methods for NFP synthesis, the synthesized NFP demonstrates a unique morphology, characterized by dumbbell-shaped structures capped with sheet-like ends. Comprehensive characterization using advanced techniques for the determination of NFP structural, morphological, and electrochemical properties were thoroughly examined using scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDS), x-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and electrochemical testing (cyclic voltammetry and battery testing). The results demonstrate that NFP exhibits excellent structural stability over time which is evident from the cycling stability results with specific capacity of up to 62 mA h g^–1 at 0.1 C, rate capability ranges from 0.1 C to 20 C, and cycling performance of up to 300 cycles at 1 C with cycle efficiencies of up to 95%, making it a viable candidate for next-generation energy storage systems.</p> Graphical abstract <p></p>