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- W4382280071 abstract "Perovskite BiFeO3-based capacitors have demonstrated potential for static electric energy storing applications with superb polarizations and rapid charge-discharge response. This report demonstrates a binary design with high storage energy densities using the lead-free 0.5 mol% Nb2O5–added 0.7(Bi1-xGdx)FeO3-0.3BaTiO3 ceramics (x = 0-0.40) tailored by the A-site gadolinium (Gd3+) substitution from ferroelectric to relaxor-ferroelectric state. An excellent recoverable energy density Wrec~6.5 J/cm3 (at 260 kV/cm) and a storing efficiency η ~75% (at 280 kV/cm) were respectively attained at x = 0.15 and x = 0.30. The breakdown electric field (Eb) rises from ~120 to ~260-280 kV/cm with increasing Gd3+ from x = 0 to x = 0.4 owing to the improved interatomic bonding, including the B-O bonds and the BO6 oxygen octahedron. The high recoverable energy densities can be correlated to the evolution of multi-phase lattice distortions, nanoscale domains, and polar nanoregions. This study signifies that the Gd3+-modified BF-BT ceramics can be candidates for electric energy-storing capacitors." @default.
- W4382280071 created "2023-06-28" @default.
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- W4382280071 date "2023-11-01" @default.
- W4382280071 modified "2023-10-09" @default.
- W4382280071 title "Tailoring energy storage in Nb2O5-added 0.7BiFeO3–0.3BaTiO3 ceramics via A-site Gd3+ substitution" @default.
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- W4382280071 doi "https://doi.org/10.1016/j.jallcom.2023.171144" @default.
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