MATERIALS LETTERS
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2022
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IF 3.574
Jinhua Du,Ye Zhao,Yanyu Wang,Jing Ai,Yong Li,Xihong Hao
High energy density is an important factor for antiferroelectric materials applied in power pulse devices. Herein, the Ag (1-3x) Yb x NbO 3 (AYNO-100 x ) ceramics with x = 0, 0.02 and 0.04 were synthesized via a solid-state reaction method in an oxygen atmosphere. The Yb 3+ doping at A-site reduces the oxygen vacancy and increases the silver vacancy after reaching saturation, which improves the antiferroelectric stability, leading to enhanced recoverable energy-storage density of 2.7 J/cm 3 under 255 kV/cm at room temperature. Meanwhile, a relatively high discharge energy density of 1.0 J/cm 3 at 200 kV/cm is also observed in the Ag 0.94 Yb 0.02 NbO 3 ceramic. These results indicate that AgNbO 3 -based ceramics are potential candidates in advanced power electronic devices.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2021
·Vol. 56
·期 34
·19155-19164
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IF 4.22
Fan Xuhui,Wang Jing,Rao Yu,Zhao Lei,Zhu Kongjun
Dielectric ceramics have attracted ever-increasing interest in energy storage applications due to their high-power density and fast charge–discharge speed. In particular, AgNbO 3 -based antiferroelectric ceramics are considered potential substitutes for lead-based ceramics. AgNbO 3 ceramics sintered with fine hydrothermal-synthesized powders show the advantage of high breakdown strength. However, the fine grains lead to the decreased polarization, which harms the recoverable energy density. In this work, a little amount over-stoichiometrical WO 3 and MnO 2 were introduced to synergistically improve the polarization and dielectric breakdown strength of obtained AgNbO 3 ceramics. The dependences of structures and dielectric properties on WO 3 doping were explored. A maximum polarization of 49.4 μC/cm 2 and E b as large as 285 kV/cm were achieved in 0.1 wt % WO 3 and MnO 2 co-doped AgNbO 3 ceramic. The corresponding W rec reached 2.75 J/cm 3 , which was 1.3 times larger than that of pristine AgNbO 3 ceramics. Moreover, benign thermal stability with W rec = 2.2–2.7 J/cm 3 over 30–150 °C at 240 kV cm −1 was also achieved in 0.1 wt.% WO 3 and MnO 2 co-doped AgNbO 3 ceramics.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2023
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IF 5.2
Haiyan Wang,Renzhong Xue,Xiang Zhu,Mengxin Ning,Haidan Liu
Improving energy storage density and efficiency of antiferroelectric materials could promote their use within energy storage field, particularly in the context of pulsed power sources. In this study, Sm and Hf co-doped silver niobate (AgNbO 3 ; AN) ceramics were prepared using traditional solid-state method. Comprehensive analysis of crystal structure, microstructure, defects, absorbance, and energy storage performance of the material was conducted. Results reveal that co-doping increased the concentration of cation vacancies and band gap, decreased the M 1 –M 2 and M 2 –M 3 phase transition temperatures, and enhanced the antiferroelectric phase stability and energy storage performance. The (Ag 0.955 Sm 0.015 )(Nb 0.95 Hf 0.05 )O 3 ceramic exhibited energy storage density of 5.35 J/cm 3 and energy storage efficiency of 73% at electric field ( E ) of 295 kV/cm, demonstrating significant improvement. The (Ag 0.955 Sm 0.015 )(Nb 0.95 Hf 0.05 )O 3 ceramic exhibited excellent thermal stability (<5% in the range of 25 °C-125 °C) and frequency stability (<3% in the range of 1–100 Hz under E = 290 kV/cm). Additionally, the (Ag 0.955 Sm 0.015 )(Nb 0.95 Hf 0.05 )O 3 ceramic exhibited ultrahigh discharge speed (∼18 μs) and high discharge energy density (4.9 J/cm 3 ). These advantages make these ceramics promising materials for energy storage applications.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2020
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IF 3.83
Yongbo Fan,Weijia Wang,Jinyan Zhao
Dielectric capacitors with high recoverable energy density are in high demand for their application in electrical and electronic systems. Among lead-free dielectric materials, silver niobate (AgNbO 3 ) has attracted growing interest due to its superior energy storage density at room temperature. The field-induced phase transition from antiferroelectric (AFE) phase to ferroelectric (FE) phase contributes to its large energy density. In this work, pure perovskite silver niobate ceramics were fabricated in an oxygen atmosphere by the solid-state reaction technique. The Pbcm orthorhombic phase of AgNbO 3 was closely observed using the Rietveld refinement method to provide explanation for the origin of high spontaneous polarization within a unit cell. Local structural analysis via piezoelectric force microscopy revealed the existence of ferroelectric nano domains, which may contribute to the high energy storage efficiency (η = 99.9926%) in AgNbO 3 at low electric fields. The phase transitions of AgNbO 3 were also investigated via the dependence of the dielectric permittivity (ε′ and ε″) and loss angle tangent (tanδ) on temperatures, providing insights into the further modification of AgNbO 3 .
研究领域:
材料科学
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电子工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Hao Yuan,Xuhui Fan,Zehan Zheng,Mingyuan Zhao,Lei Zhao,Kongjun Zhu,Jing Wang
Dielectric capacitors with large power densities are indispensable components in advanced electric and electronic devices. However, the limited energy density and efficiency are challenging and badly restrict their utilization in practice. Here, fine-grains, increased resistivity and activation energy, optimized maximum polarization, and benign relaxation features are simultaneously achieved in AgNbO 3 -based ceramics via a multi-scale synergistic design, combining hydrothermal methods with Bi and Sr doping. As a result, we synergistically realized high breakdown strength of 702 kV/cm, large recoverable energy storage density of 7.9 J/cm 3 and benign energy efficiency of 75.5 % in (Ag 0.80 Bi 0.04 Sr 0.04 )NbO 3 ceramics. Furthermore, excellent temperature-, frequency-, cycling-stability and ultrahigh discharge energy density of 5.6 J/cm 3 were simultaneously achieved in (Ag 0.80 Bi 0.04 Sr 0.04 )NbO 3 ceramics, indicating a promising candidate for competitiveness and development in advanced high-power applications.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2021
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IF 4.527
Jing Wang,Yu Rao,Xuhui Fan,Jin Zhang,Lei Zhao,Kongjun Zhu
AgNbO 3 -based ceramics have been the spotlight for the lead-free dielectric capacitors due to its unique antiferroelectric feature and the ever-increasing environmental concerns. Herein, synergic modulation on the energy storage properties of AgNbO 3 -based ceramics was reported, in which the over-stoichiometrical introduction of only 0.10 wt% MnO 2 at the atomic-scale leads to reduced leakage current, P r and enhanced antiferroelectric stability while the SiO 2 coating on the AgNbO 3 particles at the micro-scale greatly inhibits the grain growth, increases the breakdown strength and the electric filed inducing the AFE-FE transitions. As a result, a large recoverable energy density up to 3.34 J/cm 3 with efficiency of 60.0% was obtained in 0.10 wt% MnO 2 -doped AgNbO 3 @SiO 2 ceramic, which is 2.3 times larger than that of the pristine AgNbO 3 . This work provides a rational approach to synergically modulate the energy storage properties.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Yuqing Yang,Weipeng Liu,Xiangshuai Wang,Ting Tang,Lifeng Zhu,Lei Zhao,Kongjun Zhu,Jing Wang
Antiferroelectric (AFE) ceramics are competitive energy storage candidates for advanced high-power devices. However, the poor recoverable energy density and efficiency are challenging and severely hinder their applications. Here, superior energy storage performance is obtained in Bi3+-, Sr2+-, and Ta5+-codoped AgNbO3-based ceramics. Specifically, with the effective phase modulation via Bi3+, the paraelectric T phase stabilizes at room temperature and facilitates a recoverable energy storage density of 9.27 J/cm3 and an efficiency of 83.2% in (Ag0.71Bi0.07Sr0.04)(Nb0.85Ta0.15)O3 ceramics. The corresponding multilayer ceramic capacitor (MLCC) further promotes the recoverable energy storage density to 14.32 J/cm3 and efficiency to 97.8%, which is almost the best comprehensive energy storage performance among AN-based ceramics and MLCCs to the best of our knowledge. The proposed strategy is generally applicable to design high-performance energy storage devices and other functionalities of AFE dielectric materials.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）