Simultaneously achieving high energy storage performance and remarkable thermal stability in Bi0.5K0.5TiO3-based ceramics

Liang, Zheng; Niu, Zhiyong; Zheng, Peng; Zhang, Kai; Luo, Chong; Zhang, Jingji; Wang, Ningning; Bai, Wangfeng; Zhang, Yang

doi:10.1016/j.mtener.2022.101078

Cited by 21 publications

(17 citation statements)

References 48 publications

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“…3(c) and (d)). The appearance of curved domain walls was relevant to lattice mismatching between two different phases, 25 while the formation of hierarchical nanodomains resulted from the disturbance of the local stress eld and electrostatic eld caused by the occupation of multiple types of ions on the same lattice, 26 which was consistent with the previous analysis results of the Vogel-Fulcher function. As reported, the nanodomain responded to an external electric eld more easily as compared to large This journal is © The Royal Society of Chemistry 2023 counterparts, and the facilitated domain wall motion enhanced the piezoelectricity.…”

Section: Resultssupporting

confidence: 89%

Diffuse multiphase coexistence renders temperature-insensitive lead-free energy-harvesting piezoceramics

Hou

et al. 2023

J. Mater. Chem. A

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Section: Resultssupporting

confidence: 89%

Diffuse multiphase coexistence renders temperature-insensitive lead-free energy-harvesting piezoceramics

Hou

et al. 2023

J. Mater. Chem. A

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“…e) The comparison of W rec and η values of SLBNT and other recently reported lead‐free bulk ceramics. [ 17,18,22–24,27–29,38–53 ]…”

Section: Resultsmentioning

confidence: 99%

“…As a result, W rec increases to 5.895 J cm −3 with an enhancement of 50.69%, and 𝜂 is also improved to 85.37%. The achievement of optimized composition of Sr 0.425 La 0.1 □ 0.05 Ba 0.425 Nb 1.4 Ta 0.6 O 6 can also be supported by a systematical investigation on the [17,18,[22][23][24][27][28][29][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53] structure and properties of Sr 0.425 La 0.1 □ 0.05 Ba 0.425 Nb 2−x Ta x O 6 ceramics with different Ta 5+ concentrations, which is summarized in Figures S1-S4 (Supporting Information). A comparison of the ESP of our SLBNT ceramics and previously reported lead-free bulk ceramics are illustrated in Figure 2e.…”

Section: Figure 2amentioning

confidence: 88%

“…It is evident that the excellent overall performance of SLBNT ceramics leads the field in tetragonal tungsten bronze structure ferroelectric ceramics and can even be comparable with some state-of-the-art perovskite structure ceramics. [17,18,[22][23][24][27][28][29][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53] Figure 3a shows the X-ray diffractometer (XRD) patterns of SBN, SLBN, and SLBNT ceramics. All the patterns reveal pure tungsten bronze structure, indicating that the La 3+ and Ta 5+ successfully entered the SBN host lattice.…”

Section: Figure 2amentioning

confidence: 99%

“…d) A comparison of E b , P m , W rec , and 𝜂 values between SBN, SLBN, and SLBNT ceramics. e) The comparison of W rec and 𝜂 values of SLBNT and other recently reported lead-free bulk ceramics [17,18,[22][23][24][27][28][29][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53].…”

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Superior Energy Density Achieved in Unfilled Tungsten Bronze Ferroelectrics via Multiscale Regulation Strategy

Peng

Liu

et al. 2023

Advanced Science

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The most promising candidates for energy storage capacitor application are relaxor ferroelectrics, among which, the perovskite structure ferroelectric ceramics have witnessed great development progress. However, less attention has been paid on tetragonal tungsten bronze structure (TTBS) ceramics because of their lower breakdown strength and polarization. Herein, a multiscale regulation strategy is proposed to tune the energy storage performances (ESP) of TTBS ceramics from grain, domain, and macroscopic scale. The enhanced relaxor behavior with dynamic polar nanodomains guarantees low remanent polarization, while the refined grains and enlarged bandgap ensure increased breakdown strength. Hence, excellent ESP is realized in unfilled TTBS Sr0.425La0.1□0.05Ba0.425Nb1.4Ta0.6O6 (SLBNT) ceramics with an ultrahigh recoverable energy density of 5.895 J cm−3 and a high efficiency of 85.37%. This achievement notably surpasses previous studies in TTBS ceramics and is comparable to that of perovskite components. Meanwhile, the energy density exhibits a wide temperature, frequency, and cycling fatigue stability. In addition, high power density (257.89 MW cm−3), especially the ultrafast discharge time (t0.9 = 16.4 ns) are achieved. The multiscale regulation strategy unlocks the energy storage potential of TTBS ceramics and thus highlights TTBS ceramics as promising candidates for energy storage, like perovskite structured ceramics.

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Unleashed Remarkable Energy Storage Performance in Bi_0.5K_0.5TiO₃‐based Relaxor Ferroelectrics by Local Structural Fluctuation

Cao,

Li,

et al. 2024

Angewandte Chemie

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Dielectric capacitors harvest energy through an electrostatic process, which enables an ultrafast charging‐discharging rate and ultrahigh power density. However, achieving high energy density (Wrec) and efficiency (η) simultaneously, especially when preserving them across a wide frequency/temperature range or cycling numbers, remains challenging. In this work, by especially introducing NaTaO3 into the representative ferroelectric relaxor of Bi0.5K0.5TiO3‐Bi0.5Na0.5TiO3 and leveraging the mismatch between B‐site atoms, we proposed a method of enhancing local structural fluctuation to refine the polar configuration and to effectively improve its overall energy‐storage performances. As a consequence, the ceramic exhibits an ultrahigh Wrec of 15.0 J/cm3 and high η up to 80%, along with a very wide frequency stability of 10 – 200 Hz and extensive cycling number up to 108. In‐depth local structure and chemical environment investigations, consisting of atom‐scale electron microscopy, neutron total scattering, and solid‐state nuclear magnetic resonance, reveal that the randomly distributed A/B‐site atom pairs emerge in the system, leading to the evident local structural fluctuations and concomitant polymorphic polar nanodomains. These key ingredients contribute to the large polarization, minimal hysteresis, and high breakdown strength, thereby promoting energy‐storage performances. This work opens a new path for designing high‐performance dielectric capacitors via manipulating local structural fluctuations.

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Simultaneously achieving high energy storage performance and remarkable thermal stability in Bi0.5K0.5TiO3-based ceramics

Cited by 21 publications

References 48 publications

Diffuse multiphase coexistence renders temperature-insensitive lead-free energy-harvesting piezoceramics

Diffuse multiphase coexistence renders temperature-insensitive lead-free energy-harvesting piezoceramics

Superior Energy Density Achieved in Unfilled Tungsten Bronze Ferroelectrics via Multiscale Regulation Strategy

Unleashed Remarkable Energy Storage Performance in Bi_0.5K_0.5TiO₃‐based Relaxor Ferroelectrics by Local Structural Fluctuation

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Simultaneously achieving high energy storage performance and remarkable thermal stability in Bi0.5K0.5TiO3-based ceramics

Cited by 21 publications

References 48 publications

Diffuse multiphase coexistence renders temperature-insensitive lead-free energy-harvesting piezoceramics

Diffuse multiphase coexistence renders temperature-insensitive lead-free energy-harvesting piezoceramics

Superior Energy Density Achieved in Unfilled Tungsten Bronze Ferroelectrics via Multiscale Regulation Strategy

Unleashed Remarkable Energy Storage Performance in Bi0.5K0.5TiO3‐based Relaxor Ferroelectrics by Local Structural Fluctuation

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Unleashed Remarkable Energy Storage Performance in Bi_0.5K_0.5TiO₃‐based Relaxor Ferroelectrics by Local Structural Fluctuation