A-site compositional modulation in barium titanate based relaxor ceramics to achieve simultaneously high energy density and efficiency

Wang, Yuanhao; Wang, Tong; Wang, Jiahui; Liu, Jiaqi; Xing, Zhuo; Yang, Haibo; Kong, Luo; Cheng, Yan; Chen, Guanjun; Wang, Fen; Li, Chunchun

doi:10.1016/j.jeurceramsoc.2021.05.052

Cited by 85 publications

(13 citation statements)

References 65 publications

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“…Figure summarizes the W rec , η, and E b values of newly reported NaNbO 3 -, Bi 0.5 Na 0.5 TiO 3 -, BaTiO 3 -, BiFeO 3 -, and AgNbO 3 -based lead-free dielectric ceramics. ,,,,− Of note, the synergistic improvement of W rec (>10 J/cm 3 ) and η (>80%) has been a significant long-term challenge for lead-free ceramic capacitors (Figure a). Specifically, relaxor ferroelectric ceramics can easily achieve high η (>80%) because of their superior dielectric relaxor behavior, while W rec is seriously restricted by their relatively low E b (<60 kV/mm, Figure b).…”

Section: Introductionmentioning

confidence: 97%

Achieving Ultrahigh Energy Storage Density in Lead-Free Sodium Niobate-Based Ceramics by Modulating the Antiferroelectric Phase

Zhang

Guo

et al. 2022

Chem. Mater.

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Lead-free antiferroelectric ceramics have drawn widespread interest recently on account of their environmentally friendly components and potential applications in high-power systems. However, their relatively low recoverable energy storage density (W rec < 10 J/cm 3 ), limited by the electric breakdown strength (E b < 60 kV/mm), and low efficiency (η < 80%), generated by large hysteresis during the antiferroelectric−ferroelectric phase transition, have seriously restricted their application in portable and compact electronic devices. In this study, the relaxor antiferroelectric (1− x)NaNbO 3−x (0.55BiFeO 3 -0.45SrTiO 3 ) ceramics were elaborately designed and systematically explored. With the help of composition regulation, the ceramics not only exhibited a stable antiferroelectric phase but also underwent a structural transformation from an antiferroelectric P (Pbma) phase to R (Pnma) phase, as confirmed by the temperature-dependent dielectric constants, Raman spectra, X-ray diffraction (XRD) refinement, pinched polarization-electric field (P−E) curves, and four-peak current-electric field (I−E) curves. In addition, the relaxor characteristic was demonstrated by the diffuse dielectric peaks, slim P−E curves, flattened Raman peaks, and I−E curves. Consequently, novel relaxor antiferroelectric ceramics were successfully obtained, which simultaneously revealed the features of relaxor and antiferroelectricity. Specifically, the E b was significantly improved because of the reduced grain size, small sample thickness, exceptionally low dielectric loss, and a moderate dielectric constant. Finally, the sample with x = 0.12 showed an ultrahigh W rec value of 16.2 J/cm 3 and satisfactory η of 82.3% at 97 kV/mm, outperforming most state-of-the-art counterparts. Furthermore, the ceramic also exhibited a large current density (C D ) of 1268.4 A/cm 2 and power density (P D ) of 177.6 MW/cm 3 at 28 kV/mm, offering prospective applications in high-power capacitors. This work not only achieved outstanding comprehensive energy storage performance in sodium niobate-based ceramics by modulating the antiferroelectric structure but also provided a feasible route to developing high-performance dielectric capacitors from the viewpoint of structure−property relationship.

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Section: Introductionmentioning

confidence: 97%

Achieving Ultrahigh Energy Storage Density in Lead-Free Sodium Niobate-Based Ceramics by Modulating the Antiferroelectric Phase

Zhang

Guo

et al. 2022

Chem. Mater.

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“…Optimized energy storage properties with W rec = 2.92 J/cm 3 , η = 85%, and BDS = 315 kV/cm can be achieved at x = .06 composition. Comparisons of energy storage properties (Wrec and η) obtained in this case with other BaTiO3-based bulk ceramics [12][13][14][15][16][17][18][19]22,24,[49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65] are shown in Figure 13. The BaTi 1-x Li x O 3-3x F 3x (x = .06) oxy-fluoride ceramic obtained in this case demonstrates a reasonably high Wrec and η due to an increase in the E g and dielectric relaxor.…”

Section: Resultsmentioning

confidence: 99%

“…BaTiO 3 (BT) perovskite‐based ceramics have been most widely investigated for lead‐free dielectric capacitors and commercially attractive candidates for energy storage applications. Numerous researches have been devoted to improving their energy storage properties 12–16 . Nevertheless, the easy reduction of Ti 4+ at high sintering temperatures (>1300°C), limiting its dielectric break‐down strength (BDS) and thus energy storage density, is still a challenge for practical applications 17–19 .…”

Section: Introductionmentioning

confidence: 99%

“…Numerous researches have been devoted to improving their energy storage properties. [12][13][14][15][16] Nevertheless, the easy reduction of Ti 4+ at high sintering temperatures (>1300 • C), limiting its dielectric break-down strength (BDS) and thus energy storage density, is still a challenge for practical applications. [17][18][19] Although the reduction of Ti 4+ can be considerably suppressed with reoxidation treatment by annealing in an oxygen atmosphere, it is still quite difficult to be completely eliminated.…”

Section: Introductionmentioning

confidence: 99%

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Structural evolution, dielectric, electric, and energy storage properties of BaTi_1‐xLi_xO_3‐3xF_3x oxyfluorides

Li,

Bian

2023

Int J Applied Ceramic Tech

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Sintering behavior, structural evolution, dielectric, electric, and energy storage properties of BaTi1‐xLixO3‐3xF3x (x = 0‐0.10) oxy fluorides have been investigated by x‐ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), impedance, and ferroelectric analyzer in this paper. The oxy‐fluoride ceramic (x = 0.06) could be densified at ∼1000°C/2h in an N2 atmosphere without reduction of Ti4+. The solid solutions experienced a transformation from tetragonal phase into pseudo‐cubic phase at room temperature with increasing doping levels, exhibiting typical relaxor features. Pseudo‐cubic phase with a small amount of residual tetragonal phase could be observed in x = 0.02, while a trace amount of BaF2 secondary phase appeared, resulting in the formation of oxygen vacancies in the x≥0.08 compositions. Temperature‐dependent Raman analysis of the doped compositions seems to imply the presence of local polar clusters even above the Burns temperature. Insulation of the grain could be improved by appropriate doping of BaLiF3 due to an increase in the band gap, whereas high‐level doping (x>0.06) leads to a decrease in insulation due to the formation of oxygen vacancies (BaTi0.94‐xLi0.06+xO2.82‐2xF0.18+x). Optimized energy storage properties with recoverable energy density Wrec = 2.92J/cm3, efficiency η = 85%, and breakdown strength (BDS) = 315kV/cm can be achieved at x = 0.06 composition. Sintering of BaTi1‐xLixO3‐3xF3x in the ambient atmosphere leads to the deterioration of the dielectric, electric and energy storage properties compared with the counterpart sintered in N2 due to the formation of F− vacancies (BaTi0.94Li0.06O2.82+xF0.18‐2x).This article is protected by copyright. All rights reserved

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“…25 We then take the advantage of the hybridization between Bi 3+ and O 2À as well as Nb 5+ (with large ionic polarizability) to maintain high induced polarization. 23,26 Finally, MgO and Nb 2 O 5 are highly insulating materials, 27 which are beneficial to the improvement of the breakdown strength of ceramics. In addition, as the content of SMN increases, the configurational entropy DS conf of the ceramics increases from 1.43 R at x = 0.06 to 1.57 R, 1.69 R and 1.79 R at x = 0.09, 0.12, and 0.15, respectively.…”

Section: Introductionmentioning

confidence: 99%

Enhanced energy storage properties in BNT-based ceramics with a morphotropic phase boundary modified by Sr(Mg_1/3Nb_2/3)O₃

Liu,

Yan,

et al. 2023

J. Mater. Chem. C

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A-site compositional modulation in barium titanate based relaxor ceramics to achieve simultaneously high energy density and efficiency

Cited by 85 publications

References 65 publications

Achieving Ultrahigh Energy Storage Density in Lead-Free Sodium Niobate-Based Ceramics by Modulating the Antiferroelectric Phase

Achieving Ultrahigh Energy Storage Density in Lead-Free Sodium Niobate-Based Ceramics by Modulating the Antiferroelectric Phase

Structural evolution, dielectric, electric, and energy storage properties of BaTi_1‐xLi_xO_3‐3xF_3x oxyfluorides

Enhanced energy storage properties in BNT-based ceramics with a morphotropic phase boundary modified by Sr(Mg_1/3Nb_2/3)O₃

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A-site compositional modulation in barium titanate based relaxor ceramics to achieve simultaneously high energy density and efficiency

Cited by 85 publications

References 65 publications

Achieving Ultrahigh Energy Storage Density in Lead-Free Sodium Niobate-Based Ceramics by Modulating the Antiferroelectric Phase

Achieving Ultrahigh Energy Storage Density in Lead-Free Sodium Niobate-Based Ceramics by Modulating the Antiferroelectric Phase

Structural evolution, dielectric, electric, and energy storage properties of BaTi1‐xLixO3‐3xF3x oxyfluorides

Enhanced energy storage properties in BNT-based ceramics with a morphotropic phase boundary modified by Sr(Mg1/3Nb2/3)O3

Contact Info

Product

Resources

About

Structural evolution, dielectric, electric, and energy storage properties of BaTi_1‐xLi_xO_3‐3xF_3x oxyfluorides

Enhanced energy storage properties in BNT-based ceramics with a morphotropic phase boundary modified by Sr(Mg_1/3Nb_2/3)O₃