Enhanced energy storage performance of confined co-doping dielectric films via nanoparticle self-assembly in ferroelectric phases

Nature Communications, Published online: 22 June 2026; doi:10.1038/s41467-026-74471-5 The authors present a confined co-doping strategy for polymer-based dielectric films by incorporating BaTiO3 and Al2O3 nanoparticles into the ferroelectric core of coaxial electrospun fibers. The enhanced performance arises from the synergistic effects of high-polarization BaTiO3, wide-bandgap Al2O3, and BaTiO3/Al2O3 heterointerfaces.