Energy storage performance of high-entropy SBN-based tungsten bronze-structure ceramic

被引：0
作者：
Tang, Liupan [1 ,2 ]
Ning, Wenzhi [1 ,2 ]
Wu, Sha [1 ,2 ]
Xie, Jianming [1 ,2 ]
Hu, Changzheng [1 ,2 ,3 ]
Liu, Laijun [1 ,2 ,3 ]
Fang, Liang [1 ,2 ,3 ]
机构：
[1] Guilin Univ Technol, Coll Mat Sci & Engn, Key Lab New Proc Technol Nonferrous Met & Mat, Minist Educ, Guilin 541004, Peoples R China
[2] Guilin Univ Technol, Guangxi Key Lab Opt & Elect Mat & Devices, Guilin 541004, Peoples R China
[3] Guilin Univ Technol, Collaborat Innovat Ctr Explorat Nonferrous Met Dep, Guilin 541004, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2025年 / 1015卷
基金：
中国国家自然科学基金;
关键词：
Energy storage; High-entropy; Tungsten bronze structure; Relaxor ferroelectric; Ultra-fast discharge; DENSITY;
D O I：
10.1016/j.jallcom.2025.178902
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In the realm of high-power and pulse power electronic devices, lead-free dielectric ceramics have emerged as crucial components owing to their exceptional power density and ultra-fast charge-discharge capabilities. In this study, the high-entropy strategy was combined with bandgap engineering, to synthesize tungsten bronze- structured high-entropy lead-free dielectric ceramics with the formula of Sr0.475Ba0.475- La0.1Hf0.1Ti0.1Sb0.2TaxNb1.6-xO6 (Tax, where x varies from 0 to 0.3). The high-entropy strategy employed in this study effectively promotes cationic disorder and disrupts the long-range ferroelectric order, thereby intensifying the ferroelectric relaxation phenomenon. Additionally, the diminished grain size, augmented conductivity activation energy, and broadened bandgap collectively result in a remarkable increase in breakdown electric field strength. Remarkably, within the specific composition of Sr0.475Ba0.475La0.1Hf0.1Ti0.1Sb0.2Ta0.3Nb1.3O6 (x = 0.3) ceramics, outstanding energy storage parameters are achieved. A recoverable energy density of 5.22 J center dot cm-3 and an efficiency rate of 83.4 % are observed. Furthermore, a current density of approximately 1077.49 A center dot cm-2 and a power density of approximately 193.95 MW center dot cm-3 are attained, underscoring the superior performance of these materials. It is worth noting that the Ta0.3 ceramic sample exhibits a discharge time of only 13.8 ns, while maintaining excellent temperature stability within a range from 30 degrees C to 180 degrees C with a Delta Wdisof less than 10 %. These attributes position it as a potential candidate for an ultrafast charge-discharge pulse power capacitor. This research presents a promising methodology in advanced design of dielectric ceramics possessing outstanding energy storage capabilities and favourable temperature stability, paving the way for future advancements in high-power and pulse power electronic devices.
引用
收藏
页数：11
相关论文
共 65 条
  • [1] Cao L., Yuan Y., Li E., Zhang S., Relaxor regulation and improvement of energy storage properties of Sr<sub>2</sub>NaNb<sub>5</sub>O<sub>15</sub>-based tungsten bronze ceramics through B-site substitution, Chem. Eng. J., 421, (2021)
  • [2] Peng H., Liu Z., Fu Z., Dai K., Lv Z., Et al., Superior energy density achieved in unfilled tungsten bronze ferroelectrics via multiscale regulation strategy, Adv. Sci., 10, (2023)
  • [3] Jain A., Wang Y., Guo H., Microstructure induced ultra-high energy storage density coupled with rapid discharge properties in lead-free Ba<sub>0.9</sub>Ca<sub>0.1</sub>Ti<sub>0.9</sub>Zr<sub>0.1</sub>O<sub>3</sub>-SrNb<sub>2</sub>O<sub>6</sub> ceramics, Ceram. Int., 47, pp. 487-499, (2021)
  • [4] Luo W., Li D., Li Z., Shen Z., Structure and dielectric energy storage properties of secondary phase CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> modified BSBNT relaxor ferroelectric ceramics, Adv. Ceram., 44, pp. 218-225, (2023)
  • [5] Dai S., Li M., Wu X., Wu Y., Li X., Et al., Combinatorial optimization of perovskite-based ferroelectric ceramics for energy storage applications, J. Adv. Ceram., 13, pp. 877-910, (2024)
  • [6] Montecillo R., Chen C., Lee Y., Chen P., Tu C., Et al., Optimized electric-energy storage in BiFeO<sub>3</sub>–BaTiO<sub>3</sub> ceramics via tailoring microstructure and nanocluster, J. Eur. Ceram. Soc., 43, pp. 1941-1951, (2023)
  • [7] Montecillo R., Chen C., Feng K., Chien R., Haw S., Et al., Achieving superb electric energy storage in relaxor ferroelectric BiFeO<sub>3</sub>-BaTiO<sub>3</sub>-NaNbO<sub>3</sub> ceramics via O<sub>2</sub> atmosphere, J. Eur. Ceram. Soc., 43, pp. 7446-7454, (2023)
  • [8] Wu S., Fu B., Zhang J., Du H., Zong Q., Et al., Superb energy storage capability for NaNbO<sub>3</sub>-based ceramics featuring labyrinthine submicro-domains with clustered lattice distortions, Small, 19, (2023)
  • [9] Jayakrishnan A.R., Silva J.P.B., Kamakshi K., Dastan D., Annapureddy V., Et al., Are lead-free relaxor ferroelectric materials the most promising candidates for energy storage capacitors?, Prog. Mater. Sci., (2022)
  • [10] Wang H., Wu S., Fu B., Zhang J., Du H., Et al., Hierarchically polar structures induced superb energy storage properties for relaxor Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-based ceramics, Chem. Eng. J., 471, (2023)
1234567