Article Dans Une Revue Materials Science in Semiconductor Processing Année : 2025

Enhancing energy storage performance of BT-based ceramics by doping modification

Résumé

The dielectric capacitor is widely used in dielectric energy storage materials for its faster charging and discharging rates, and the higher maximum polarization (Pmax) of BaTiO3(BT)-based lead-free ceramics has attracted extensive research, however, the lower breakdown electric field (Eb) and recoverable energy storage density (Wrec) limit their applications in energy storage. In this work, (1-x) (0.9Ba0.9Ca0.1TiO3-0.1Bi0.5La0.5(Mg0.67Nb0.33)O3)- xBi0.5Na0.5TiO3 lead-free relaxation has been prepared using a solid reaction method by introducing the second component, Bi0.5Na0.5TiO3 (BNT) and Ca2+ doping based on 0.9BaTiO3-0.1Bi0.5La0.5(Mg0.67Nb0.33)O3 (0.9BT-0.1BLMN) ferroelectric ceramics. The introduction of BNT increases the saturation polarization strength of ceramics materials and enhances the relaxation properties of ceramics due to the difference in the radius of the introduced ions, which leads to distortion of the lattice and disruption of the ferroelectric long-range ordered structure. The 0.85 (0.9Ba0.9Ca0.1TiO3-0.1Bi0.5La0.5(Mg0.67Nb0.33)O3)- 0.15Bi0.5Na0.5TiO3 (0.85 (0.9BCT-0.1BLMN)-0.15BNT) ceramics obtained excellent performance at Eb of 260 kV/cm with Wrec of 2.68 J/cm3 and energy storage efficiency (η) of 86.7 %. In addition, the charging and discharging performance of the 0.85 (0.9BCT-0.1BLMN)-0.15BNT ceramics measured electric field at 140 kV/cm, the power density (PD) is 15.51 MW/cm3 and t0.9 is 1.12 μs.

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Dates et versions

hal-05072224 , version 1 (18-05-2025)

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Yuanyuan Zheng, Zhonghua Dai, Chenxi Liu, Xujun Li, Xin Zhao, et al.. Enhancing energy storage performance of BT-based ceramics by doping modification. Materials Science in Semiconductor Processing, 2025, 196, pp.109656. ⟨10.1016/j.mssp.2025.109656⟩. ⟨hal-05072224⟩
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