TY - JOUR
T1 - Weakly coupled relaxor construction in lead-free ferroelectrics with simple composition for superior energy-storage performance
AU - Liu, Minghao
AU - Ming, Chen
AU - Liu, Zhen
AU - Liu, Hongbo
AU - Han, Bing
AU - Narayanan, Narendirakumar
AU - Liu, Xuantong
AU - Dai, Kai
AU - Lu, Teng
AU - Chen, Xuefeng
AU - Hu, Zhigao
AU - Liu, Yun
AU - Wang, Genshui
N1 - Publisher Copyright:
© 2025 The Royal Society of Chemistry.
PY - 2025/3/12
Y1 - 2025/3/12
N2 - The development of advanced environmentally friendly energy storage capacitors is critical to meet escalating demands of pulsed power systems. However, challenges persist in enhancing both the recoverable energy density (Wrec) and efficiency (η) simultaneously. In the present study, a strategy involving domain configuration modulation, achieved by simple single rare earth ion doping, was proposed to enhance the energy-storage performance of BaTiO3. The designed Ba1−1.5xLaxTiO3 (BLT-x) ceramics exhibited an ultrahigh Wrec of 9.2 J cm−3 and η of 85.0% when x = 0.10. Furthermore, the origin of the superior performance was revealed through first-principles calculations and atomic-scale displacement analysis. The introduction of La generated intense structural fluctuations in the ordered ferroelectric domains, leading to relaxors with weakly coupled polar nanoregions and delayed saturation polarization. Such factors, combined with enhanced Eb, contributed to elongated P-E loops and ultimately ultrahigh Wrec and η. Meanwhile, the BLT-0.10 ceramic demonstrated exceptional temperature stability (−40-120 °C), frequency stability (10-250 Hz) and fatigue stability (106 cycles), along with notable charging-discharging capabilities. The present research not only provides a potential candidate for advanced pulsed power systems, but also offers a novel strategy for achieving superior energy-storage performance in perovskite ferroelectrics through single rare earth ion-doping.
AB - The development of advanced environmentally friendly energy storage capacitors is critical to meet escalating demands of pulsed power systems. However, challenges persist in enhancing both the recoverable energy density (Wrec) and efficiency (η) simultaneously. In the present study, a strategy involving domain configuration modulation, achieved by simple single rare earth ion doping, was proposed to enhance the energy-storage performance of BaTiO3. The designed Ba1−1.5xLaxTiO3 (BLT-x) ceramics exhibited an ultrahigh Wrec of 9.2 J cm−3 and η of 85.0% when x = 0.10. Furthermore, the origin of the superior performance was revealed through first-principles calculations and atomic-scale displacement analysis. The introduction of La generated intense structural fluctuations in the ordered ferroelectric domains, leading to relaxors with weakly coupled polar nanoregions and delayed saturation polarization. Such factors, combined with enhanced Eb, contributed to elongated P-E loops and ultimately ultrahigh Wrec and η. Meanwhile, the BLT-0.10 ceramic demonstrated exceptional temperature stability (−40-120 °C), frequency stability (10-250 Hz) and fatigue stability (106 cycles), along with notable charging-discharging capabilities. The present research not only provides a potential candidate for advanced pulsed power systems, but also offers a novel strategy for achieving superior energy-storage performance in perovskite ferroelectrics through single rare earth ion-doping.
UR - https://www.scopus.com/pages/publications/105000314931
U2 - 10.1039/d5mh00261c
DO - 10.1039/d5mh00261c
M3 - 文章
C2 - 40111212
AN - SCOPUS:105000314931
SN - 2051-6347
VL - 12
SP - 3939
EP - 3948
JO - Materials Horizons
JF - Materials Horizons
IS - 11
ER -