Achieving high energy storage performance and ultrafast discharge speed in SrTiO3-based ceramics via a synergistic effect of chemical modification and defect chemistry

Liu, Lulu; Chu, Bingkai; Li, Peng; Fu, Peng; Du, Juan; Hao, Jigong; Li, Wei; Zeng, Huarong

doi:10.1016/j.cej.2021.132548

Cited by 58 publications

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References 69 publications

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“…The first abnormal peak at T s is derived from the thermal evolution of T ( P 4 bm ) and R ( R 3 c ) discrete PNRs, while the abnormality at T m is related to the phase transition of PNRs from R 3 c to P 4 bm . , From Figure a,b, it can be learned that although the samples with x ≥ 0.12 still have two dielectric anomalies, the high-temperature peak T m turns into a shoulder, while the low-temperature shoulder T s transforms into a peak. Meanwhile, with the increasing La 3+ content, ε r decreases significantly and the dielectric temperature plateau between T s and T m widens, suggesting stronger relaxation in samples with high La 3+ content . Moreover, in the whole measurement temperature range, the dielectric loss, tan δ, of all samples is less than 0.05, especially for samples with high La 3+ content, indicating excellent thermal stability.…”

Section: Resultsmentioning

confidence: 92%

“…One is the improved structural symmetry of x La, being close to cubic symmetry, which provides the basic structure for breakdown resistance. Another reason can be the fine-grained microstructures with smaller grain size, rendering materials more resistant to electric fields . The average BDS ( E b ) is also critical for dielectric energy storage materials for applications in advanced pulsed power systems.…”

Section: Resultsmentioning

confidence: 99%

“…The simulated evolution of the electric potential/field distribution along with the electrical tree propagation for the 0.12La ceramic is shown in Figure (under 430 kV/cm) and Videos S1, S2, S3, S4, S5, and S6 (under 200, 300, and 430 kV/cm). It is generally known that the breakdown energy of grain boundaries is much higher than that of the grain interior, , so grain boundaries cannot be easily broken down, whereas grains are prone to breakdown under electric field. Therefore, the growth of electrical trees initially occurs at the grain boundary and then gradually penetrates the grain interior. , For the present 0.12La sample, the electrical trees increase with the externally applied electric field.…”

Section: Resultsmentioning

confidence: 99%

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High-Energy Storage Properties over a Broad Temperature Range in La-Modified BNT-Based Lead-Free Ceramics

Chu

Hao

et al. 2022

ACS Appl. Mater. Interfaces

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The development of high-performance energy storage materials is decisive for meeting the miniaturization and integration requirements in advanced pulse power capacitors. In this study, we designed high-performance [(Bi0.5Na0.5)0.94Ba0.06](1–1.5x)La x TiO3 (BNT-BT-xLa) lead-free energy storage ceramics based on their phase diagram. A strategy combining phase adjustment and domain control via doping was proposed to enhance the energy storage performance. The obtained results showed that La3+ ions doped into BNT-BT improved the crystal structure symmetry and induced a strong dielectric relaxation behavior, which destroyed the long-term ferroelectric order and effectively promoted the formation of polar nanoregions. At x = 0.12, a high recoverable energy density (W rec) of ∼5.93 J/cm3 and a relatively large energy storage efficiency (η) of 77.6% were obtained under a high breakdown electric field of 440 kV/cm. By using a two-step sintering approach for the microstructural optimization, the energy storage performance was further improved, yielding much higher W rec (6.69 J/cm3) and η (87.0%). Additionally, both conventionally sintered and two-step-sintered samples showed excellent frequency stability (0.5–500 Hz), thermal endurance (25–180 °C), and fatigue resistance (105 cycles). Regarding the pulse charge–discharge performance, the samples exhibited ultrashort discharge time (t 0.9 ∼ 89 ns for the conventionally sintered sample and ∼75 ns for the two-step-sintered sample) under an electric field of 240 kV/cm. Furthermore, the breakdown process of the material was simulated based on the finite element analysis, and it was shown that high breakdown strength of the material could be ascribed to fine grains, which significantly hindered the crack propagation during the application of the electric field. These results show that the presented materials have great potential as high-energy storage capacitors.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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High-Energy Storage Properties over a Broad Temperature Range in La-Modified BNT-Based Lead-Free Ceramics

Chu

Hao

et al. 2022

ACS Appl. Mater. Interfaces

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“…For example, Liu et al obtained the W rec ∼ 3.9 J/cm 3 and superior η ∼ 94.7% in 0.8SBT-0.2BNT ceramic with the P max of 28 μC/cm 2 at 390 kV/cm. 33 Kong et al realized moderate W rec ∼ 3.1 J/ cm 3 and η ∼ 93% with the P max of 23 μC/cm 2 in 0.9SBT-0.1 Bi(Mg 0.5 Hf 0.5 )O 3 ceramic. 34 Through A-site defect tuning, Zhu et al realized higher W rec ∼ 4.77 J/cm 3 with the P max ∼ 25 μC/ cm 2 at 570 kV/cm.…”

Section: Introductionmentioning

confidence: 98%

“…Much previous work has demonstrated good W rec and η in SBT-modified ceramic capacitors. ,− However, the research about SBT-based energy-storage ceramics is comparatively sparse. For example, Liu et al obtained the W rec ∼ 3.9 J/cm 3 and superior η ∼ 94.7% in 0.8SBT-0.2BNT ceramic with the P max of 28 μC/cm 2 at 390 kV/cm . Kong et al realized moderate W rec ∼ 3.1 J/cm 3 and η ∼ 93% with the P max of 23 μC/cm 2 in 0.9SBT-0.1 Bi(Mg 0.5 Hf 0.5 )O 3 ceramic .…”

Section: Introductionmentioning

confidence: 99%

Achieving Ultrahigh Energy-Storage Density with Excellent Thermal Stability in Sr_0.7Bi_0.2TiO₃-Based Relaxors via Polarization Behavior Modulation

Wang

Kang

Hong

et al. 2022

ACS Appl. Mater. Interfaces

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Dielectric capacitors possessing the inherent superiorities of high power density and ultrafast charge–discharge speed make their utilization in energy-storage devices extremely propitious, although the relatively low recoverable energy-storage density (W rec) may impede their applications. In this work, unlike the mainstream approach of destroying long-range ferroelectric/antiferroelectric order and inducing relaxor properties to achieve a high W rec value, we have selected end members with a high polarization gene to promote the polarization behavior of the typical relaxor Sr0.7Bi0.2TiO3. Therefore, an ultrahigh W rec ∼ 8 J/cm3 and a superior efficiency (η) ∼ 91% are accomplished in the 0.98[0.56(Sr0.7Bi0.2)TiO3-0.44(Bi0.5Na0.5)TiO3]-0.02 Bi(Mg0.5Ti0.5)O3 sample. The achieved W rec value is record high in Sr0.7Bi0.2TiO3-based systems as far as we know. The polarization-enhancement behavior can be explained by the phase field simulation results, phase content variance in X-ray diffraction Rietveld refinement, hardening trend in Raman spectroscopy, domain morphology, and local symmetry in transmission electron microscope analysis. Meanwhile, the ceramic possesses excellent thermal stability (ΔW rec < 12.7% and Δη < 10.4%, −50–200 °C), frequency (ΔW rec < 2.69% and Δη < 2.06%, 0.5–500 Hz), and fatigue-resistant stability (ΔW rec < 0.08% and Δη < 0.2%, up to 1 × 105 cycles). Accordingly, this work proposes a design idea to tailor the polarization behavior and energy-storage properties of typical relaxors.

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Delayed Polarization Saturation Induced Superior Energy Storage Capability of BiFeO₃‐Based Ceramics Via Introduction of Non‐Isovalent Ions

Zhao

et al. 2023

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Electrostatic capacitors are emerging as a highly promising technology for large‐scale energy storage applications. However, it remains a significant challenge to improve their energy densities. Here, an effective strategy of introducing non‐isovalent ions into the BiFeO3‐based (BFO) ceramic to improve energy storage capability via delaying polarization saturation is demonstrated. Accordingly, an ultra‐high energy density of up to 7.4 J cm−3 and high efficiency ≈ 81% at 680 kV m−1 are realized, which is one of the best energy storage performances recorded for BFO‐based ceramics. The outstanding comprehensive energy storage performance is attributed to inhibiting the polarization hysteresis resulting from generation ergodic relaxor zone and random field, and generating highly‐delayed polarization saturation with continuously‐increased polarization magnitudes with the electric field of supercritical evolution. The contributions demonstrate that delaying the polarization saturation is a consideration for designing the next generation of lead‐free dielectric materials with ultra‐high energy storage performance.

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Achieving high energy storage performance and ultrafast discharge speed in SrTiO3-based ceramics via a synergistic effect of chemical modification and defect chemistry

Cited by 58 publications

References 69 publications

High-Energy Storage Properties over a Broad Temperature Range in La-Modified BNT-Based Lead-Free Ceramics

High-Energy Storage Properties over a Broad Temperature Range in La-Modified BNT-Based Lead-Free Ceramics

Achieving Ultrahigh Energy-Storage Density with Excellent Thermal Stability in Sr_0.7Bi_0.2TiO₃-Based Relaxors via Polarization Behavior Modulation

Delayed Polarization Saturation Induced Superior Energy Storage Capability of BiFeO₃‐Based Ceramics Via Introduction of Non‐Isovalent Ions

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Achieving high energy storage performance and ultrafast discharge speed in SrTiO3-based ceramics via a synergistic effect of chemical modification and defect chemistry

Cited by 58 publications

References 69 publications

High-Energy Storage Properties over a Broad Temperature Range in La-Modified BNT-Based Lead-Free Ceramics

High-Energy Storage Properties over a Broad Temperature Range in La-Modified BNT-Based Lead-Free Ceramics

Achieving Ultrahigh Energy-Storage Density with Excellent Thermal Stability in Sr0.7Bi0.2TiO3-Based Relaxors via Polarization Behavior Modulation

Delayed Polarization Saturation Induced Superior Energy Storage Capability of BiFeO3‐Based Ceramics Via Introduction of Non‐Isovalent Ions

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Product

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Achieving Ultrahigh Energy-Storage Density with Excellent Thermal Stability in Sr_0.7Bi_0.2TiO₃-Based Relaxors via Polarization Behavior Modulation

Delayed Polarization Saturation Induced Superior Energy Storage Capability of BiFeO₃‐Based Ceramics Via Introduction of Non‐Isovalent Ions