Ultra-high energy storage performance with mitigated polarization saturation in lead-free relaxors

Yang, Letao; Kong, Xi; Cheng, Zhenxiang; Zhang, Shujun

doi:10.1039/c9ta01165j

Cited by 224 publications

(86 citation statements)

References 56 publications

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“…However, BNT also has a very large remnant polarization (P r ≈ 38 μC/cm 2 ), which makes its P-E hysteresis loop showing fat shape unsatisfied for energy storage applications [10]. In recent years, BNT modifications, such as doped by (Sr,Bi)TiO 3 (SBT), (K,Na)NbO 3 (KNN), or SrTiO 3 (ST), have been extensively studied to reduce its P r markedly and enhance breakdown strength, thus achieving high recoverable energy density [9,[11][12][13][14][15][16][17]. Meanwhile, BNT is lead-free, which is highly expected to replace the widely used relaxor ferroelectric Pb-containing systems in ceramic capacitor applications [18].…”

Section: Introduction mentioning

confidence: 99%

P-E hysteresis loop going slim in Ba0.3Sr0.7TiO3-modified Bi0.5Na0.5TiO3 ceramics for energy storage applications

Shen

et al. 2020

J Adv Ceram

108

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Ba 0.3 Sr 0.7) x (Bi 0.5 Na 0.5) 1-x TiO 3 (BS x BNT, x = 0.3-0.8) ceramics were prepared to investigate their structure, dielectric and ferroelectric properties. BS x BNT ceramics possess pure perovskite structure accompanied from a tetragonal symmetry to pseudo-cubic one with the increase of x value, being confirmed by X-ray diffraction (XRD) and Raman results. The T m corresponding to a temperature in the vicinity of maximum dielectric constant gradually decreases from 110 ℃ (x = 0.3) to-45 ℃ (x = 0.8), across T m = 36 ℃ (x = 0.5) with a maximum dielectric constant (ɛ r = 5920 @1 kHz) around room temperature. The saturated polarization P s gradually while the remnant polarization P r sharply decreases with the increase of x value, making the P-E hysteresis loop of BS x BNT ceramics goes slim. A maximum difference between P s and P r (P s-P r) is obtained for BS x BNT ceramics with x = 0.5, at which a high recoverable energy density (W rec = 1.04 J/cm 3) is achieved under an applied electric field of 100 kV/cm with an efficiency of  = 77%. Meanwhile, the varied temperature P-E loops, fatigue measurements, and electric breakdown characteristics for the sample with x = 0.5 indicate that it is promising for pulsed power energy storage capacitor candidate materials.

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Section: Introduction mentioning

confidence: 99%

P-E hysteresis loop going slim in Ba0.3Sr0.7TiO3-modified Bi0.5Na0.5TiO3 ceramics for energy storage applications

Shen

et al. 2020

J Adv Ceram

108

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“…Bi 3+ ions possess similar 6s 2 lone-pair electronic configuration to Pb 2+ , thus Bi-containing relaxors are considered as promising alternatives to lead-based relaxors [8,9]. Recently, many efforts have been made for developing bismuth-containing lead-free relaxors for high energy-density capacitors [10,11,12,13,14,15,16,17,18,19,20,21,22]. For example, by improving the…”

Section: Introductionmentioning

confidence: 99%

Enhanced energy density and electric cycling reliability via MnO2 modification in sodium niobate‐based relaxor dielectric capacitors

Yang

Kong

Cheng

et al. 2021

Journal of Materials Research

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Sodium niobate (NaNbO 3 )-based dielectrics have received much attention for energy storage applications due to their low-cost, lightweight, and nontoxic nature. The field-induced metastable ferroelectric phase in NaNbO 3 -based dielectrics, however, leads to a large hysteresis of the polarizationelectric field (P-E) loops and hence deteriorate the energy storage performance. In this study, the hysteresis was successfully reduced by introducing Bi 3+ and Ti 4+ into A-site and B-site of NaNbO 3 , respectively. MnO 2 addition was added to further increase the ceramic density and enhance the cycling reliability. As a result, a high recoverable energy density of 4.3 J/cm 3 and a high energy efficiency of 90% were simultaneously achieved in the ceramic capacitor at an applied electric field of 360 kV/cm. Of particular importance is that the ceramic capacitor exhibits a stable energy storage properties over a wide temperature range of −70 to 170 °C, with much improved electric cycling reliability up to 10 5 cycles.

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“…As shown in Figure 5d, the m value for 6BMZ ceramic is 17, leading to a high level of confidence. The calculated E b of 6BMZ is 460 kV/cm which is much higher than other lead-free energy storage ceramics [32][33][34][35][36], as shown in Table 2. The energy storage properties of BaTiO 3 -Bi(Me Me")O 3 ceramics have been widely studied, and the obtained energy densities have been found to be around 1-3 J/cm 3 in previous research as shown in Table 2.…”

Section: Energy Storage Properties Of 094sbt-006bmz Ceramicmentioning

confidence: 82%

Ultrahigh Energy Storage Properties in (Sr0.7Bi0.2)TiO3-Bi(Mg0.5Zr0.5)O3 Lead-Free Ceramics and Potential for High-Temperature Capacitors

et al. 2020

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Due to the enhanced demand for numerous electrical energy storage applications, including applications at elevated temperatures, dielectric capacitors with optimized energy storage properties have attracted extensive attention. In this study, a series of lead-free strontium bismuth titanate based relaxor ferroelectric ceramics have been successfully synthesized by high temperature solid-state reaction. The ultrahigh recoverable energy storage density of 4.2 J/cm3 under 380 kV/cm, with the high efficiency of 88%, was obtained in the sample with x = 0.06. Of particular importance is that this ceramic composition exhibits excellent energy storage performance over a wide work temperature up to 150 °C, with strong fatigue endurance and fast discharge speed. All these merits demonstrate the studied ceramic system is a potential candidate for high-temperature capacitors as energy storage devices.

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Ultra-high energy storage performance with mitigated polarization saturation in lead-free relaxors

Abstract: A strategy of mitigating polarization saturation is applied to enhance the energy storage properties of Sn-modified NBT–ST relaxor ceramics.

Cited by 224 publications

References 56 publications

P-E hysteresis loop going slim in Ba0.3Sr0.7TiO3-modified Bi0.5Na0.5TiO3 ceramics for energy storage applications

P-E hysteresis loop going slim in Ba0.3Sr0.7TiO3-modified Bi0.5Na0.5TiO3 ceramics for energy storage applications

Enhanced energy density and electric cycling reliability via MnO2 modification in sodium niobate‐based relaxor dielectric capacitors

Ultrahigh Energy Storage Properties in (Sr0.7Bi0.2)TiO3-Bi(Mg0.5Zr0.5)O3 Lead-Free Ceramics and Potential for High-Temperature Capacitors

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