TY - JOUR
T1 - Improvement of energy storage properties of BNT-based ceramics via compositional modification
AU - Yan, Yangxi
AU - Hui, Jiejie
AU - Wang, Xiaoying
AU - Zhang, Dongyan
AU - Zhang, Maolin
AU - Zhao, Mo
AU - Wan, Meng
AU - Jin, Li
AU - Li, Zhimin
N1 - Publisher Copyright:
© 2024 Elsevier Ltd and Techna Group S.r.l.
PY - 2024/12/1
Y1 - 2024/12/1
N2 - Lead-free ceramic capacitors are extensively utilized in pulsed power systems for their environmentally friendly characteristics, high power density, and fast charging/discharging rate. However, it remains highly challenging to achieve concurrent improvements in both recoverable energy storage density (Wrec) and efficiency (η). In this study, Ta2O5 with a wide bandgap (∼4 eV) was chosen in complex with Mg2+ ions to form Ba(Mg1/3Ta2/3)O3 as the second phase of a BNT-based solid solution. Combined with phase modulation, a compositional disorder of equipotential sites is formed in chalcogenide crystals, which in turn induces charge disorder generating localized random fields. We have designed and prepared a set of binary (1-x)Bi0.5Na0.5TiO3-xBa(Mg1/3Ta2/3)O3 (BNT-xBMT) ceramics using a conventional solid-phase method. An ultra-high breakdown field strength (Eb) value (245 kV/cm) was attained in 0.80BNT-0.20BMT ceramic, resulting in desirable values of Wrec (3.99 J/cm3) and η (92.0 %). These results offer a new strategy for designing high entropy ceramic materials of high performance in the future.
AB - Lead-free ceramic capacitors are extensively utilized in pulsed power systems for their environmentally friendly characteristics, high power density, and fast charging/discharging rate. However, it remains highly challenging to achieve concurrent improvements in both recoverable energy storage density (Wrec) and efficiency (η). In this study, Ta2O5 with a wide bandgap (∼4 eV) was chosen in complex with Mg2+ ions to form Ba(Mg1/3Ta2/3)O3 as the second phase of a BNT-based solid solution. Combined with phase modulation, a compositional disorder of equipotential sites is formed in chalcogenide crystals, which in turn induces charge disorder generating localized random fields. We have designed and prepared a set of binary (1-x)Bi0.5Na0.5TiO3-xBa(Mg1/3Ta2/3)O3 (BNT-xBMT) ceramics using a conventional solid-phase method. An ultra-high breakdown field strength (Eb) value (245 kV/cm) was attained in 0.80BNT-0.20BMT ceramic, resulting in desirable values of Wrec (3.99 J/cm3) and η (92.0 %). These results offer a new strategy for designing high entropy ceramic materials of high performance in the future.
KW - Energy storage characteristics
KW - Lead-free ceramics
KW - Relaxation characteristics
KW - Solid solution
UR - https://www.scopus.com/pages/publications/85205734580
U2 - 10.1016/j.ceramint.2024.09.361
DO - 10.1016/j.ceramint.2024.09.361
M3 - 文献综述
AN - SCOPUS:85205734580
SN - 0272-8842
VL - 50
SP - 48918
EP - 48930
JO - Ceramics International
JF - Ceramics International
IS - 23
ER -