Enhanced dielectric breakdown strength and ultra-fast discharge performance of novel SrTiO3 based ceramics system

Jan, Abdullah; Liu, Hanxing; Hao, Hua; Yao, Zhonghua; Emmanuel, Marwa; Pan, Wengao; Ullah, Atta; Manan, Abdul; Ullah, Asmat; Cao, Minghe; Ahmad, Arbab Safeer

doi:10.1016/j.jallcom.2020.154611

Cited by 37 publications

(13 citation statements)

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“…The E b values of 0.85NN–0.15BNT and recently reported Pb-free ceramics are compared in Figure a. Compared with the recently reported lead-free ceramic substrates [BT-based, ,, BNT-based, ,, KNN-based, ,, and AgNbO 3 (AN)-based − ], 0.85NN–0.15BNT ceramics have an ultrahigh E b (575 kV cm –1 ), which is also the highest value for the NN-based systems. , To investigate the effect of high E b on the energy storage density of ceramics, the reported energy storage density and efficiency of other lead-free ceramics are compared with the W rec and η of the (1 – x )NN– x BNT ( x = 0.15) ceramics, as shown in Figure b. ,,,,,− ,− It is observed that the KNN-based and AN-based ceramics have high W rec values, while their η values are comparatively low. Although BT, BNT, SrTiO 3 (ST), and NN ceramics have a higher η, these materials have lower W rec values than the BNT-doped NN ceramics.…”

Section: Resultsmentioning

confidence: 97%

“…It is highly important to obtain a great power density and charge–discharge energy efficiency in ceramic capacitors . A high discharge energy density is beneficial for the miniaturization and integration of ceramic dielectric capacitors, and a high charge–discharge energy efficiency can remarkably decrease the heat generation of dielectric capacitors during the charge–discharge process, thus improving the reliability of the pulse system. , Generally, the charge energy storage density ( W ), discharge density ( W rec ), and energy storage efficiency (η) can be calculated by integrating the P – E circuit according to the following equation: − , , η = W rec / W × 100%, where E is the external electric field, P max is the maximum polarization, and P r is the residual polarization. To obtain better energy storage performance, the material should have a smaller P r and a higher P max and electric field breakdown strength ( E b ) .…”

Section: Introductionmentioning

confidence: 99%

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Ultrahigh Energy Storage Characteristics of Sodium Niobate-Based Ceramics by Introducing a Local Random Field

Pang

Chen

Sun

et al. 2020

ACS Sustainable Chem. Eng.

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Lead-free ceramic capacitors are widely applied for novel pulse power supply systems owing to their environmental friendliness, high power density, and fast charge−discharge characteristics. Nevertheless, the simultaneous achievement of a higher recoverable energy storage density (W rec ) and efficiency (η) is still challenging and must be investigated. To obtain a dielectric capacitor with a high W rec and η, the energy storage characteristics can be improved by reducing the residual polarization and increasing the breakdown strength. In this work, the doping modification of the NaNbO 3 (NN) ceramics is used to produce a local random field to improve the electrical breakdown strength, obtaining a lead-free dielectric capacitor with high energy storage characteristics. According to this strategy, Bi(Ni 0.67 Ta 0.33 )O 3 is added to NN, and an ultrahigh E b is obtained so that the ceramics have ideal W rec and η values. 0.85NN−0.15Bi(Ni 0.67 Ta 0.33 )O 3 has a very high W rec (5.53 J cm −3 ) and η (82.0%) at 575 kV cm −1 . Furthermore, the energy storage characteristics of the ceramics exhibit good thermal stability and frequency stability that are superior to those of most of the lead-free dielectric capacitors reported to date. In particular, the 0.85NN−0.15 Bi 0.5 Na 0.5 TiO 3 (0.85NN−0.15BNT) ceramic also allows an ultrafast discharge time (t 0.9 = 27.5 ns), large current density (C D = 506.42 A cm −2 ), and higher power density (P D = 35.45 mW cm −3 ). These results indicate that (1 − x)NN−xBNT ceramics are promising for applications in lead-free dielectric ceramic capacitors with a high energy storage density and conversion efficiency.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Storage Characteristics of Sodium Niobate-Based Ceramics by Introducing a Local Random Field

Pang

Chen

Sun

et al. 2020

ACS Sustainable Chem. Eng.

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“…The reason for pushing more on lead-free dielectrics rests on the detrimental effect of lead materials on the environment and living creatures at large. Lead-free ceramics include Bi 0.5 Na 0.5 TiO 3 (BNT)-based, ,− AgNbO 3 (AN)-based, − K 0.5 Na 0.5 NbO 3 (KNN)-based, − NaNbO 3 (NN)-based, − BaTiO 3 (BT)-based, − and SrTiO 3 (ST)-based ceramics. − Each category mentioned displays its peculiar characteristics; their representative recoverable energy density ( W rec ), efficiency (η), and breakdown strength (BDS) values are illustrated in Figure .…”

Section: Introductionmentioning

confidence: 99%

“…Illustration of the W rec , BDS, and η of various dielectric ceramic materials in comparison to the current compositions. AN-based. − KNN-based, − BT-based, − ST-based, − BNT-based, ,− and NN-based ceramics. − …”

Section: Introductionmentioning

confidence: 99%

Significantly Enhanced Energy Storage Density of NNT Ceramics Using Aliovalent Dy³⁺ Dopant

Emmanuel

Hao

Liu

et al. 2021

ACS Sustainable Chem. Eng.

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Sodium niobate (NN)-based lead-free ceramic Dy x Na 1−x (Nb 0.9 Ta 0.1 )O 3 denoted as (DNNT) x = 0, 0.05, 0.1, 0.2, and 0.3 was synthesized via a conventional solid-state method to achieve bulk lead-free dielectric ceramics having an improved energy storage capability that can conceivably be used in pulsed power technology. The addition of Dy 3+ broadened the phase transition peak, thereby strengthening the relaxor properties of the DNNT ceramic materials. The sample's microstructure was explored using a scanning electron microscope, and its corresponding phase structure via X-ray diffraction (XRD). A systematic study was carried out for energy storage properties of 0.2 mol of Dy 3+ (DNNT20) where a recoverable energy storage density (W rec ) of 4.61 J cm −3 with a breakdown strength (BDS) of 478 kV cm −1 and an energy storage efficiency (η) of ≈84% were achieved. Additionally, the DNNT20 ceramics displayed comparatively reasonable temperature stability (20−140 °C), excellent frequency stability (0.1−100 Hz), and also fast charge−discharge speed (≤0.5 μs). Thus, the DNNT20 ceramic materials can be of probable use for future energy storage applications.

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“…In addition, D is defined as the product of dielectric constant of material and applied electric field as given by eq : where ε r represents the relative permittivity of dielectric material. From eq and eq , it can be concluded that the energy density of dielectric materials can be improved collaboratively by increasing their E b (i.e., electric breakdown strength) and D or ε r . − However, it is a dilemma that ceramic and polymer dielectric materials do not attain high energy density because of inferior E b and ε r , respectively. − To solve this problem, polymers are coupled to ceramic nanofillers for realizing nanocomposite dielectrics. This technique garnered global emphasis due to its probable application in future flexible electronic devices. ,,− Till now, several high-functioning ferroelectric-type polymers, for example, poly(vinylidene fluoride) (i.e., PVDF), poly(vinylidene fluoride- co -hexafluoropropylene) (i.e., PVDF-HFP), and poly(vinylidene fluoride- co -chlorotrifluoroethylene) (i.e., PVDF-CTFE), and linear-type polymers like poly(etherimide) and poly(methyl methacrylate) have been utilized as polymer matrix materials. ,,,− Besides, various nanofillers, for instance, TiO 2 , SrTiO 3 , BaTiO 3 , and BN, to name some, are incorporated with the above-mentioned matrix materials to enhance the permittivity further and to some extent diverge the electric field treeing for realizing high energy density and efficient charge–discharge cycles. ,,, Further, the ferroelectric-type polymer nanocomposites usually show high permittivity but greater conductive losses and lower charge–discharge efficiency .…”

Section: Introductionmentioning

confidence: 99%

Significant Energy Density of Discharge and Charge–Discharge Efficiency in Ag@BNN Nanofillers-Modified Heterogeneous Sandwich Structure Nanocomposites

Marwat

Yasar

et al. 2020

ACS Appl. Energy Mater.

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The development of innovative dielectrics by considerably improving their energy densities of discharge is important for current electronic power systems. We present here newly designed heterogeneous sandwich structure nanocomposites (i.e., P(VDF-HFP)-xwt%Ag@BN nanosheets (Ag@ BNN)/PEI-P(VDF-HFP)). The outer ferroelectric-type P(VDF-HFP) layers enhanced the dielectric displacement, while PEI reduced the losses due to its linear characteristic. Besides, the use of Ag@BNN as nanofillers improved the dielectric displacement, as well as breakdown strength. Consequently, the ideal sandwich structure achieved a significant energy density of 11.3 J/cm 3 and decent charge−discharge efficiency of 80% at about 510 MV/m. This discharge energy density is the highest reported until now when charge−discharge efficiency of ≥80% is considered as the threshold. In-depth analysis revealed that comparatively higher D max − D r (i.e., 4.7 μC/cm 2 ), as well as the utmost breakdown strength (i.e., 510 MV/m), assisted in achieving this relatively higher discharge energy density. The finite element simulation demonstrated the efficacy of using Ag@BNN over BNN as nanofillers; i.e., it showed diverged electric field vectors near Ag nanoparticles, optimum electric field distribution between the sandwich structure layers, and improved dielectric displacement, in comparison with unmodified BNNs. The ideal sandwich structure also showed a short discharge time of 9.02 μs, a high power density of 0.165 MW/cm 3 , and an excellent lifetime until 40 000 cycles. This study shows that heterogeneous sandwich-structured nanocomposites with a surface decorated Ag@BNN nanofillers can be used in advanced dielectrics and pulsed power devices.

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Enhanced dielectric breakdown strength and ultra-fast discharge performance of novel SrTiO3 based ceramics system

Cited by 37 publications

References 53 publications

Ultrahigh Energy Storage Characteristics of Sodium Niobate-Based Ceramics by Introducing a Local Random Field

Ultrahigh Energy Storage Characteristics of Sodium Niobate-Based Ceramics by Introducing a Local Random Field

Significantly Enhanced Energy Storage Density of NNT Ceramics Using Aliovalent Dy³⁺ Dopant

Significant Energy Density of Discharge and Charge–Discharge Efficiency in Ag@BNN Nanofillers-Modified Heterogeneous Sandwich Structure Nanocomposites

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Enhanced dielectric breakdown strength and ultra-fast discharge performance of novel SrTiO3 based ceramics system

Cited by 37 publications

References 53 publications

Ultrahigh Energy Storage Characteristics of Sodium Niobate-Based Ceramics by Introducing a Local Random Field

Ultrahigh Energy Storage Characteristics of Sodium Niobate-Based Ceramics by Introducing a Local Random Field

Significantly Enhanced Energy Storage Density of NNT Ceramics Using Aliovalent Dy3+ Dopant

Significant Energy Density of Discharge and Charge–Discharge Efficiency in Ag@BNN Nanofillers-Modified Heterogeneous Sandwich Structure Nanocomposites

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Significantly Enhanced Energy Storage Density of NNT Ceramics Using Aliovalent Dy³⁺ Dopant