Enhanced energy storage properties under low electric fields in (Bi0.5Na0.5)TiO3-based relaxor ferroelectrics via a synergistic optimization strategy

Xie, Hang; Du, Hongliang; Liu, Linjing; Kou, Qiangwei; Xu, Jiwen; Sun, Yuan; Lv, Rui; Chang, Yunfei; Wang, Dawei

doi:10.1016/j.cej.2022.138432

Cited by 18 publications

(3 citation statements)

References 64 publications

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“…Meanwhile, compared to current reports, these values are superior to those of the most lead-free energy storage ceramics under MEFs (∼200–300 kV/cm) as compared in Figure h. The comparison of the W rec – E relationship between the x = 0.04 sample and other lead-free energy-storage ceramics also highlights that the MEF-energy-storage performance of the present sample rivals all the counterparts. ,,− …”

Section: Resultscontrasting

confidence: 43%

Outstanding Energy Storage Performance of NBT-Based Ceramics under Moderate Electric Field Achieved via Antiferroelectric Engineering

Cao

Zhao

et al. 2023

ACS Appl. Mater. Interfaces

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Ultrahigh energy-storage performance of dielectric ceramic capacitors is generally achieved under high electric fields (HEFs). However, the HEFs strongly limit the miniaturization, integration, and lifetime of the dielectric energy-storage capacitors. Thus, it is necessary to develop new energy-storage materials with excellent energy-storage densities under moderate electric fields (MEFs). Herein, the antiferroelectric material Ag0.9Ca0.05NbO3 (ACN) was used to modify the relaxor ferroelectric material 0.6Na0.5Bi0.5TiO3–0.4Sr0.7Bi0.2TiO3 (NBT-SBT). The introduction of ACN results in high polarization strength, regulated composition of rhombohedral (R3c) and tetragonal (P4bm), nanodomains, and refined grain size. An outstanding recoverable energy density (W rec = 4.6 J/cm3) and high efficiency (η = 82%) were realized under an MEF of 260 kV/cm in 4 mol % ACN-modified NBT-SBT ceramic. The first-principles calculation reveals that the interaction between Bi and O is the intrinsic mechanism of the increased polarization. A new parameter ΔP/E b was proposed to be used as the figure of merit to measure the energy-storage performance under MEFs (∼200–300 kV/cm). This work paves a new way to explore energy-storage materials with excellent-performance MEFs.

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Section: Resultscontrasting

confidence: 43%

Outstanding Energy Storage Performance of NBT-Based Ceramics under Moderate Electric Field Achieved via Antiferroelectric Engineering

Cao

Zhao

et al. 2023

ACS Appl. Mater. Interfaces

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“…There are a variety of ways to enhance the breakdown electric field of typical ferroelectrics, such as increasing density, reducing grain size, improving electrical resistivity, enhancing band gap width, and constructing core-shell structure. [15][16][17] Lately, many studies demonstrated that Nb doping at the B site is confirmed to be an effective approach to enhance the E b for perovskite ferroelectrics. In one way, Nb doping can be used to regulate the grain size of perovskite ferroelectrics.…”

Section: 𝐸𝑑𝑃mentioning

confidence: 99%

High energy storage performance of lead‐free Nb‐modified (Bi_0.2Na_0.2Ca_0.2Ba_0.2Sr_0.2)TiO₃ high‐entropy ceramics

Zhang,

Niu

et al. 2024

J Am Ceram Soc.

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Owing to the intrinsic chemical disorder of microscopic composition, perovskite high‐entropy ceramics exhibit dielectric relaxation behaviors and are favorable for energy storage performance. In this work, (Bi0.2Na0.2Ca0.2Ba0.2Sr0.2)(Ti1−xNbx)O3 (BNCBST‐xNb, 0.01 ≤ x ≤ 0.25) ceramics were prepared using a hydrothermal method. The results indicate that Nb doping into BNCBST induces lattice expansion and deepens dielectric relaxation. Moreover, the BNCBST‐xNb ceramics exhibit a great enhancement of electrical breakdown strength (Eb) with Nb content, which results from the reduction of grain size, the increase of resistivity, the decrease of oxygen vacancies, and the enlargement of band gap width. Consequently, the BNCBST‐0.15Nb system presents an outstanding Eb of 497 kV/cm with excellent recoverable energy density (Wrec = 3.85 J/cm3) and efficiency (η = 87.7%), accompanying by the wide temperature stability (Wrec and η vary within ± 9.8% and ± 1.4% at 40–100°C) and fast discharge rate (t0.9 = 88 ns). The significant improvement of Eb and energy storage properties suggest that our research offers an effective strategy for developing lead‐free energy storage ceramics.

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“…Some effective methods are considered to reduce leakage and enhance energy storage performances, including modifying the lattice structure, electric domain structure, and conductivity type by chemical doping and solid solution. − Although the modification may reduce leakage, it is sometimes accompanied with a decrease in polarization strength, which is not beneficial to improving the energy storage density. Therefore, limiting leakage without expanse of polarization is a challenging and meaningful topic.…”

Section: Introductionmentioning

confidence: 99%

Leakage-Limitation Engineering Derived from an Interfacial Charge Barrier for Dielectric Energy Storage in Relaxation Ferroelectric Films

et al. 2023

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For dielectric energy storage films, high leakage current always results in larger loss of energy, heating breakdown, and poor stability. This work designs an interfacial charge barrier by combining with Na0.5Bi3.25La1.25Ti4O15 and BaBi3.4La0.6Ti4O15 films with different conductivity and dielectric constant to substantially improve the leakage characteristics, thereby obtaining a breakdown electric field as high as 3683 kV/cm and superior energy storage performances with an energy storage density of 106 J/cm–3 and an efficiency of 73.6%. Meanwhile, excellent frequency, temperature, and fatigue for stable operating states are achieved in the composite films. The interfacial charge barrier plays a key role in limiting the leakage and enhancing the breakdown field due to the scattering or absorption for the space charges. The electric-field and electric-current density distribution simulated by the finite element analysis shows that the interfacial charge barrier impedes the flow of leakage current and raises the breakdown electric field. This work provides a leakage-limitation engineering for designing high-performance film dielectric capacitor devices.

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Enhanced energy storage properties under low electric fields in (Bi0.5Na0.5)TiO3-based relaxor ferroelectrics via a synergistic optimization strategy

Cited by 18 publications

References 64 publications

Outstanding Energy Storage Performance of NBT-Based Ceramics under Moderate Electric Field Achieved via Antiferroelectric Engineering

Outstanding Energy Storage Performance of NBT-Based Ceramics under Moderate Electric Field Achieved via Antiferroelectric Engineering

High energy storage performance of lead‐free Nb‐modified (Bi_0.2Na_0.2Ca_0.2Ba_0.2Sr_0.2)TiO₃ high‐entropy ceramics

Leakage-Limitation Engineering Derived from an Interfacial Charge Barrier for Dielectric Energy Storage in Relaxation Ferroelectric Films

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Enhanced energy storage properties under low electric fields in (Bi0.5Na0.5)TiO3-based relaxor ferroelectrics via a synergistic optimization strategy

Cited by 18 publications

References 64 publications

Outstanding Energy Storage Performance of NBT-Based Ceramics under Moderate Electric Field Achieved via Antiferroelectric Engineering

Outstanding Energy Storage Performance of NBT-Based Ceramics under Moderate Electric Field Achieved via Antiferroelectric Engineering

High energy storage performance of lead‐free Nb‐modified (Bi0.2Na0.2Ca0.2Ba0.2Sr0.2)TiO3 high‐entropy ceramics

Leakage-Limitation Engineering Derived from an Interfacial Charge Barrier for Dielectric Energy Storage in Relaxation Ferroelectric Films

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High energy storage performance of lead‐free Nb‐modified (Bi_0.2Na_0.2Ca_0.2Ba_0.2Sr_0.2)TiO₃ high‐entropy ceramics