➀ Researchers developed a novel one-step stretching technique to enhance the energy storage capabilities of BaTiO3/PVDF nanocomposites; ➁ The technique optimizes PVDF crystallization and BaTiO3 nanowire orientation, improving energy density and efficiency; ➂ The results show significant improvements in dielectric properties, breakdown strength, and energy density, with a remarkable energy density of 38.3 J/cm³ for single-layer films.