Structure and dielectric properties of NBT-xBT-ST lead-free ceramics for energy storage

Luo, Wen–Qin; Shen, Zong–Yang; Yu, Yuanying; Song, Fang; Wang, Zhumei; Li, Yueming

doi:10.1142/s2010135x18200047

Cited by 8 publications

(4 citation statements)

References 23 publications

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“…NBT-based ceramics are promising candidates of lead-free dielectrics due to their high P max and T c . However, their large hysteresis and low BDS are not ideal for high energy density capacitor applications. − Attempts to improve their properties generally fall into the following approaches: (i) doping on the A-site (Ba, Sr, K, Li, La, Dy, Nd) ,,,− and B-site (commonly Nb) and codoping (K,Sr/Nb; K,La/Zr; Li,K,Sr/Ta,Nb; K,Mg/Nb; Ba/Nb; Ba/Sn; Ba/Sn,Zr; Ba/Ta; Ba/Zr; Ba,Ca/Zr; Ba,K,Ca/Nb,Zr; Ba/Mg,Nb; Ba/Mg; Ba,La/Al,Nb; Ba,Sr/Yb,Nb; Ba/Hf; La/Al; La,Ba/Nb; Sr/Sn; Sr/Zr; Sr/Mg; Sr/Mg,Nb); ,− (ii) forming solid solution with other end-members, such as AN, NN, and SBT; ,− (iii) using additives such as MnO, Fe 2 O 3 , MgO, SnO 2 , ZnO, CaO, and ZrO 2 ,,,− and (iv) employing different processing methods such as hot-pressing and synthesis using sol–gel derived powders. ,,,, The energy storage properties of NBT-based materials are summarized in Table .…”

Section: State-of-the-art In Electroceramics For Energy Storagementioning

confidence: 99%

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

et al. 2021

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Materials exhibiting high energy/power density are currently needed to meet the growing demand of portable electronics, electric vehicles and large-scale energy storage devices. The highest energy densities are achieved for fuel cells, batteries, and supercapacitors, but conventional dielectric capacitors are receiving increased attention for pulsed power applications due to their high power density and their fast charge–discharge speed. The key to high energy density in dielectric capacitors is a large maximum but small remanent (zero in the case of linear dielectrics) polarization and a high electric breakdown strength. Polymer dielectric capacitors offer high power/energy density for applications at room temperature, but above 100 °C they are unreliable and suffer from dielectric breakdown. For high-temperature applications, therefore, dielectric ceramics are the only feasible alternative. Lead-based ceramics such as La-doped lead zirconate titanate exhibit good energy storage properties, but their toxicity raises concern over their use in consumer applications, where capacitors are exclusively lead free. Lead-free compositions with superior power density are thus required. In this paper, we introduce the fundamental principles of energy storage in dielectrics. We discuss key factors to improve energy storage properties such as the control of local structure, phase assemblage, dielectric layer thickness, microstructure, conductivity, and electrical homogeneity through the choice of base systems, dopants, and alloying additions, followed by a comprehensive review of the state-of-the-art. Finally, we comment on the future requirements for new materials in high power/energy density capacitor applications.

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Section: State-of-the-art In Electroceramics For Energy Storagementioning

confidence: 99%

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

et al. 2021

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“…By comparing the W rec values under a unit electric field, the quality of energy‐storage properties under a specific electric field is evaluated 20 . This result illustrates that under the low electric field ( E = 200 kV/cm), W rec and η of 9NT are better than most typical reported systems 16,21–46 …”

Section: Resultsmentioning

confidence: 87%

“…Comparison of energy‐storage performance between 9NT ceramics and other lead‐free dielectric ceramics under unit electric field 16,21–46 …”

Section: Resultsmentioning

confidence: 99%

Energy‐storage properties of (0.7Bi_0.65Na_0.35Fe_0.3Ti_0.7O₃–0.3Sr_0.85Bi_0.1TiO₃)–NaTaO₃ relaxor under low electric fields

Yang,

Ren,

et al. 2023

Int J Applied Ceramic Tech

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Currently, the energy‐storage properties of dielectric ceramic capacitors have aroused wide attention; however, most materials exhibiting excellent energy‐storage properties are based on high electric fields, which increase the cost of insulation technology. Herein, the energy‐storage and charge–discharge properties of (1 − x)(0.7Bi0.65Na0.35Fe0.3Ti0.7O3–0.3Sr0.85Bi0.1TiO3)–xNaTaO3 (x = 0.03–0.18, abbreviated as 100xNT) ceramics are investigated. 9NT achieves superior energy‐storage properties under a low electric field of 210 kV/cm, with an energy‐storage density (Wrec) of 3.44 J/cm3 and efficiency (η) of 86.6%. The energy‐storage properties exhibit excellent frequency stability in 3–100 Hz as well as temperature stability between 25 and 175°C. Furthermore, the charge–discharge performance features a high‐power density (PD = 67.04 MW/cm3), and an ultrafast discharge speed (t0.9 = 52 ns). This work paves a new way to explore energy‐storage competitive materials under low electric fields.

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“…Meanwhile, barium titanate (BaTiO 3 , BT) was reported to form unlimited solid solution with ST to have tunable dielectric properties [12,13], as well as form morphotropic phase boundary (MPB) with NBT to enhance ferroelectric, piezoelectric and dielectric properties [14][15][16]. Actually, in our previous work, BT modified NBT-ST with a composition of 0.7NBT-0.26ST-0.04BT was found to possess an optimized energy storage density and efficiency [17].…”

Section: Introductionmentioning

confidence: 99%

Structure Characterization and Energy Storage Evaluation of Manganese-Doped 0.7NBT-0.26ST-0.04BT Ceramics

Shen¹

2019

Ceramics - Silikaty

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Bi 0.5)TiO 3-0.26SrTiO 3-0.04BaTiO 3 (0.7NBT-0.26ST-0.04BT) ceramics was chosen as the base material, and x mol. % MnCO 3 (x = 0, 0.1, 0.3, 0.5, 0.7) was externally introduced to investigate its effect on the phase structure, microstructure, dielectric and ferroelectric properties for energy storage. X-ray diffraction (XRD) analysis revealed that no diffraction peak location shifting but intensity weakening can be observed with manganese doping amount, indicating manganese did not enter the crystal lattice but form glass phases and/or impurities. Scanning electron microscopy (SEM) analysis showed that manganese doping promoted grain growth, and some liquid or precipitated impurity particles were found at grain boundaries, which was consistent with the results of XRD. Manganese doping can effectively suppress the dielectric loss near room temperature of the ceramics. When the doping amount of MnCO 3 was 0.5 mol. % and the applied electric field was only 60 kV•cm-1 , the optimal recoverable energy density and efficiency of the ceramics were 0.63 J•cm-3 and 65 % respectively, presenting a valuable solid state energy storage ceramic capacitor material.

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Structure and dielectric properties of NBT-xBT-ST lead-free ceramics for energy storage

Cited by 8 publications

References 23 publications

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

Energy‐storage properties of (0.7Bi_0.65Na_0.35Fe_0.3Ti_0.7O₃–0.3Sr_0.85Bi_0.1TiO₃)–NaTaO₃ relaxor under low electric fields

Structure Characterization and Energy Storage Evaluation of Manganese-Doped 0.7NBT-0.26ST-0.04BT Ceramics

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Structure and dielectric properties of NBT-xBT-ST lead-free ceramics for energy storage

Cited by 8 publications

References 23 publications

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

Energy‐storage properties of (0.7Bi0.65Na0.35Fe0.3Ti0.7O3–0.3Sr0.85Bi0.1TiO3)–NaTaO3 relaxor under low electric fields

Structure Characterization and Energy Storage Evaluation of Manganese-Doped 0.7NBT-0.26ST-0.04BT Ceramics

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Energy‐storage properties of (0.7Bi_0.65Na_0.35Fe_0.3Ti_0.7O₃–0.3Sr_0.85Bi_0.1TiO₃)–NaTaO₃ relaxor under low electric fields