Expanded linear polarization response and excellent energy-storage properties in (Bi0.5Na0.5)TiO3-KNbO3 relaxor antiferroelectrics with medium permittivity

Huang, Jinhai; Qi, He; Gao, Ya; Xie, Aiwen; Zhang, Yuhan; Li, Yifan; Wang, Siyue; Zuo, Ruzhong

doi:10.1016/j.cej.2020.125639

Cited by 93 publications

(37 citation statements)

References 35 publications

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“…The PNRs responded quickly when the electric field was switched and maintained a large P m while reducing P r , thereby leading to a thin P - E loop. As the BMT content increased, the P - E curves were gradually pinched, suggesting the ergodic relaxor behavior is enhancement and the ferroelectricity inhibited . The P m showed a reducing trend with increasing BMT content, which is consistent with the decrease of ε m and is beneficial for improving the E b because the dielectric breakdown strength is inversely proportional to the permittivity and polarization. , Interestingly, a nearly zero P r was obtained in the x = 0.08 and x = 0.1 samples due to the enhanced relaxor behavior induced by the PNRs.…”

Section: Results and Discussionmentioning

confidence: 95%

“…The comparison of the performance of BNST-0.08BMT ceramics with other reported lead-free bulk materials as shown in Figure (a). ,,,,,− Previous research only exhibited a maximum BNT-based bulk ceramic W rec of 7.5 J/cm 3 with η of 92%, which was at a disadvantage as compared to BF-based ( W rec = 8.12 J/cm 3 , η = 90%) and NN-based ( W rec = 12.2 J/cm 3 , η = 69%) materials. ,, Satisfyingly, this study greatly improved the W rec of the BNT-based bulk materials using the above component design strategy. As such, the comprehensive properties of the BNST-0.08BMT ceramics are expected to be superior to all known lead-free bulk ceramics due to the simultaneous achievement of an ultrahigh W rec (8.58 J/cm 3 ) and superior η (93.5%), thus exhibiting great application potential in the energy storage field.…”

Section: Results and Discussionmentioning

confidence: 99%

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Ultrahigh Energy Storage Density and Efficiency in Bi_0.5Na_0.5TiO₃-Based Ceramics via the Domain and Bandgap Engineering

Wang

Feng

Luo

et al. 2021

ACS Appl. Mater. Interfaces

116

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Environmentally friendly lead-free dielectric ceramics have attracted wide attention because of their outstanding power density, rapid charge/dischargerate, and superior stability. Nevertheless, as a hot material in dielectric ceramic capacitors, the energy storage performance of Na0.5Bi0.5TiO3-based ceramics has been not satisfactory because of their higher remnant polarization value and low dielectric breakdown strength, which is a problem that must be urgently overcome. In this work, the (1 – x) (0.6Na0.5Bi0.5TiO3 – 0.4Sr0.7Bi0.2TiO3) – xBa(Mg1/3Ta2/3)O3 (BNST-xBMT) systems were designed based on a dual optimization strategy of domain and bandgap to solve the above problems. As a result, a record-breaking ultrahigh energy density and excellent efficiency (W rec = 8.58 J/cm3, η = 93.5%) were obtained simultaneously under 565 kV/cm for the BNST-0.08BMT ceramic. The introduction of Sr0.7Bi0.2TiO3 induces the formation of nanodomains in BNT-based ceramics, leading to slim P-E curves, and the further modification of Mg/Ta reduces the grain sizes and increases the bandgap width, resulting in significant enhancement of the dielectric breakdown strength. Moreover, excellent stability and superior discharge performance (W d = 4.7 J/cm3, E = 320 kV/cm) in the BNST-0.08BMT ceramic were also achieved. The results suggest that the BNST-0.08BMT ceramic shows potential applicability for dielectric energy storage ceramics. Simultaneously, the composition-design concept in the system provides a good reference for the further development of ceramic dielectric capacitors.

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Section: Results and Discussionmentioning

confidence: 95%

Section: Results and Discussionmentioning

confidence: 99%

Ultrahigh Energy Storage Density and Efficiency in Bi_0.5Na_0.5TiO₃-Based Ceramics via the Domain and Bandgap Engineering

Wang

Feng

Luo

et al. 2021

ACS Appl. Mater. Interfaces

116

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“…For temperature stability, with increasing temperature, the P max and P r show a slight decreasing trend (Figure S10a) due to the enhanced thermal fluctuation, the decreased size of PNRs, and the increased dynamics of PNRs. 63 This results in a slight decrease of W rec and an increase of η, but both variations of W rec and η are less than 2.8%. For frequency stability, with increasing frequency, the P max fluctuates around 18.36 μC/cm 2 and the P r slightly increases (Figure S10b) because the domain wall motions and domain switching lag behind the increasing frequencies.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

“…The sample exhibits thin P – E loops under different conditions with low P r , indicating excellent relaxation stability. For temperature stability, with increasing temperature, the P max and P r show a slight decreasing trend (Figure S10a) due to the enhanced thermal fluctuation, the decreased size of PNRs, and the increased dynamics of PNRs . This results in a slight decrease of W rec and an increase of η, but both variations of W rec and η are less than 2.8%.…”

Section: Results and Discussionmentioning

confidence: 99%

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr_0.7Bi_0.2TiO₃-Based Lead-Free Relaxor Ferroelectric Ceramics

Zhao

Fang

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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Sr 0.7 Bi 0.2 TiO 3 (SBT) is a promising pulse energy storage material due to minor hysteresis, but its low maximum polarization (P max ) is bad for energy storage. K + −Bi 3+ defect pairs were introduced into the A-site of SBT to obtain Sr 0.35 Bi 0.35 K 0.25 TiO 3 (SBKT) with larger P max . Through firstprinciples calculations, we determined that the introduction of defect pairs destroys the paraelectric order phase and increases local polarization, resulting in more and larger polar nanoregion (PNR) formation. On this basis, doping NaNbO 3 (NN) in A-and B-sites of SBKT increases the cationic disorder and ferroelectric destabilization, further destroying the long-range order structure and forming more PNRs with smaller sizes. This enhances relaxation and decreases remnant polarization, and the broadened dielectric peak enables 0.85SBKT−0.15NN to meet the X7R specification. Furthermore, the decreased grain size and oxygen vacancy, increased thermal conductivity, and weakened local electric field (simulated by COMSOL) increase the dielectric breakdown strength (BDS). As a result, 0.95SBKT−0.05NN exhibits a high energy storage density (W) of 2.45 J/cm 3 with a high efficiency of 93.1%, a high pulsed discharge energy density of 2.1 J/cm 3 , and a high power density of 54.1 MW/cm 3 at 220 kV/cm. The energy storage properties show excellent stability of temperature (−55 to 150 °C), frequency (10−500 Hz), and cycling (10 5 cycles). Notably, for the pulse charge−discharge properties, 0.95SBKT−0.05NN shows great fatigue resistance during 10 5 cycles under 25 and 150 °C, accompanied by excellent thermal stability. Moreover, the BDS and P max of 0.95SBKT−0.05NN sintered in O 2 further enhance. A higher W of 2.92 J/cm 3 with a high efficiency of 89% at 250 kV/cm is achieved. Therefore, 0.95SBKT−0.05NN shows great application potential for pulse energy storage. In this work, we provide a novel strategy and systematic in-depth study for improving the energy storage properties of SBT.

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“…Figure 6 exhibits the comparison of W rec and η values between x = 0.12 in this work and some recently reported typical lead-free dielectric ceramics, including Bi 0.5 Na 0.5 TiO 3 (BNT)-, BaTiO 3 (BT)-, BiFeO 3 (BF)-, and K 0.5 Na 0.5 NbO 3 (KNN)-based ceramics. 12,13,18,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] As can be seen, excellent energy storage properties have been achieved in many works, but the simultaneous enhancement of W rec (> 5 J/cm 3 ) and η (> 80%) is still a challenge. Fortunately, the x = 0.12 ceramic explored in this work exhibits more superior comprehensive energy storage properties than most of lead-free bulk ceramics.…”

Section: Resultsmentioning

confidence: 99%

Energy storage performance of BiFeO₃–SrTiO₃–BaTiO₃ relaxor ferroelectric ceramics

et al. 2022

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Dielectric capacitors reveal great potential in the application of high power and/or pulsed power electronic devices owing to their ultrafast charge-discharge rate and ultrahigh power density. Among various dielectric capacitors, the environment-friendly lead-free dielectric ceramics have drawn extensive investigations in recent years. Nevertheless, the relatively small recoverable energy storage density (W rec ) is still an obstacle for their application. Herein, the (0.55−x)BiFeO 3 -0.45SrTiO 3 -xBaTiO 3 ternary ceramics with 0.1 wt% MnO 2 were prepared by the solid-state reaction, and achieved enhanced relaxor behavior as well as breakdown strength E b . As a result, the x = 0.12 ceramic exhibited superior comprehensive energy storage performance of large E b (50.4 kV/mm), ultrahigh W rec (7.3 J/cm 3 ), high efficiency η (86.3%), relatively fast charge-discharge speed (t 0.9 = 6.1 μs) and outstanding reliability under different frequency, fatigue, and temperature, indicating that the BiFeO 3 -based relaxor ferroelectric ceramics are prospective alternatives for electrostatic energy storage.

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Expanded linear polarization response and excellent energy-storage properties in (Bi0.5Na0.5)TiO3-KNbO3 relaxor antiferroelectrics with medium permittivity

Cited by 93 publications

References 35 publications

Ultrahigh Energy Storage Density and Efficiency in Bi_0.5Na_0.5TiO₃-Based Ceramics via the Domain and Bandgap Engineering

Ultrahigh Energy Storage Density and Efficiency in Bi_0.5Na_0.5TiO₃-Based Ceramics via the Domain and Bandgap Engineering

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr_0.7Bi_0.2TiO₃-Based Lead-Free Relaxor Ferroelectric Ceramics

Energy storage performance of BiFeO₃–SrTiO₃–BaTiO₃ relaxor ferroelectric ceramics

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Expanded linear polarization response and excellent energy-storage properties in (Bi0.5Na0.5)TiO3-KNbO3 relaxor antiferroelectrics with medium permittivity

Cited by 93 publications

References 35 publications

Ultrahigh Energy Storage Density and Efficiency in Bi0.5Na0.5TiO3-Based Ceramics via the Domain and Bandgap Engineering

Ultrahigh Energy Storage Density and Efficiency in Bi0.5Na0.5TiO3-Based Ceramics via the Domain and Bandgap Engineering

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr0.7Bi0.2TiO3-Based Lead-Free Relaxor Ferroelectric Ceramics

Energy storage performance of BiFeO3–SrTiO3–BaTiO3 relaxor ferroelectric ceramics

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Ultrahigh Energy Storage Density and Efficiency in Bi_0.5Na_0.5TiO₃-Based Ceramics via the Domain and Bandgap Engineering

Ultrahigh Energy Storage Density and Efficiency in Bi_0.5Na_0.5TiO₃-Based Ceramics via the Domain and Bandgap Engineering

Aliovalent Doping Engineering for A- and B-Sites with Multiple Regulatory Mechanisms: A Strategy to Improve Energy Storage Properties of Sr_0.7Bi_0.2TiO₃-Based Lead-Free Relaxor Ferroelectric Ceramics

Energy storage performance of BiFeO₃–SrTiO₃–BaTiO₃ relaxor ferroelectric ceramics