TY - JOUR
T1 - Multiscale Domain and Defect Engineering for High-Performance Energy Storage in Bi(Zn2/3Nb1/3)O3-Modified Ba0.85Ca0.15Zr0.1Ti0.9O3 Relaxor Ferroelectrics
AU - Cao, Jiaxiang
AU - Zhang, Xiaohua
AU - Zhang, Yutao
AU - Zhang, Jie
AU - Zhao, Jinyan
AU - Ren, Wei
AU - Yue, Zhenxing
N1 - Publisher Copyright:
© 2026 American Chemical Society
PY - 2026/5/12
Y1 - 2026/5/12
N2 - Driven by the increasing demands for miniaturization and environmental sustainability, the development of high-performance lead-free energy storage materials for electronic systems has become a pivotal research focus. However, the issues of low energy density and low breakdown strength, coupled with high leakage conductance and inadequate thermostability, are still the main obstacles facing the practical application of dielectric energy storage. Here, a synergistic strategy is proposed to optimize the energy storage performance of lead-free polycrystalline ceramics through modulating normal ferroelectrics and relaxor ferroelectrics. The high-quality Bi(Zn2/3Nb1/3)O3-modified Ba0.85Ca0.15Zr0.1Ti0.9O3 [(1-x)BCZT-xBZN] ceramics are designed to investigate their multiscale domain structure, relaxation behavior, defect chemistry, and energy storage properties. This approach effectively regulates the phase structure and refines the grain size, essentially breaking the long-range ordering and constructing polar nanoregions. It significantly enhances the recoverable energy density, with improvements in the maximum polarization (Pmax) and breakdown field strength (Eb) simultaneously. The optimized composition of 0.95BCZT-0.05BZN exhibits a high recoverable energy density (Wrec) of 2.956 J/cm3, high storage efficiency (η) of 78.69%, and an ultrafast discharge time (t0.9) of only 68.4 ns, along with excellent fatigue endurance and remarkable frequency stability. Thermally stimulated depolarizing currents (TSDC) reveal the equilibrium of the defect chemistry in the (1-x)BCZT-xBZN dielectrics. The introduction of A-site Bi3+ undergoes donor doping, consuming oxygen vacancies, thereby reducing leakage conductivity and increasing the breakdown electric field. Concurrently, B-site (Zn2/3Nb1/3)3+ composite ions enhance the relaxation properties and synergistically improve the energy storage performance.
AB - Driven by the increasing demands for miniaturization and environmental sustainability, the development of high-performance lead-free energy storage materials for electronic systems has become a pivotal research focus. However, the issues of low energy density and low breakdown strength, coupled with high leakage conductance and inadequate thermostability, are still the main obstacles facing the practical application of dielectric energy storage. Here, a synergistic strategy is proposed to optimize the energy storage performance of lead-free polycrystalline ceramics through modulating normal ferroelectrics and relaxor ferroelectrics. The high-quality Bi(Zn2/3Nb1/3)O3-modified Ba0.85Ca0.15Zr0.1Ti0.9O3 [(1-x)BCZT-xBZN] ceramics are designed to investigate their multiscale domain structure, relaxation behavior, defect chemistry, and energy storage properties. This approach effectively regulates the phase structure and refines the grain size, essentially breaking the long-range ordering and constructing polar nanoregions. It significantly enhances the recoverable energy density, with improvements in the maximum polarization (Pmax) and breakdown field strength (Eb) simultaneously. The optimized composition of 0.95BCZT-0.05BZN exhibits a high recoverable energy density (Wrec) of 2.956 J/cm3, high storage efficiency (η) of 78.69%, and an ultrafast discharge time (t0.9) of only 68.4 ns, along with excellent fatigue endurance and remarkable frequency stability. Thermally stimulated depolarizing currents (TSDC) reveal the equilibrium of the defect chemistry in the (1-x)BCZT-xBZN dielectrics. The introduction of A-site Bi3+ undergoes donor doping, consuming oxygen vacancies, thereby reducing leakage conductivity and increasing the breakdown electric field. Concurrently, B-site (Zn2/3Nb1/3)3+ composite ions enhance the relaxation properties and synergistically improve the energy storage performance.
KW - Bi(ZnNb)O
KW - Energy storage
KW - Lead-free BCZT-based ceramics
KW - Relaxor ferroelectrics
KW - TSDC
UR - https://www.scopus.com/pages/publications/105038646115
U2 - 10.1021/acsaelm.6c00299
DO - 10.1021/acsaelm.6c00299
M3 - 文章
AN - SCOPUS:105038646115
SN - 2637-6113
VL - 8
SP - 4148
EP - 4161
JO - ACS Applied Electronic Materials
JF - ACS Applied Electronic Materials
IS - 9
ER -