POLYMER COMPOSITES
·
2024
·
IF 4.8
Can Qu,Yiting Long,Xuemei Zhang,Jingsong Liu,Linyu Pu,Xu Huang
In this paper, UiO-66 nanoparticles were synthesized through the hydrothermal synthesis technique. Subsequently, a series of metal-organic framework/polyvinylidene fluoride (MOF/PVDF) composite films were produced via a solution-casting approach. The dielectric properties of UiO-66/PVDF (U/P) composite are improved with the addition of UiO-66. The dielectric constant ( ɛ r ) of 20 wt% U/P composite film at 10 2 Hz is 11.20, 1.44 times that of pure PVDF film ( ɛ r = 7.78). However, the breakdown strength ( E b ) was only 95 kV mm −1 . To solve the problem of sharp decline in E b , TiO 2 with a wide band gap was introduced to form an insulating layer on the surface of UiO-66. This reduces the difference in electrical properties between the filler and PVDF, hinders the formation of the conductive path within the composite, reduces leakage current, and increases E b . Compared with the U/P composite, the ɛ r and E b of TiO 2 @UiO-66/PVDF (T@U/P) composite film are increased, and the dielectric loss (tan δ ) and leakage current density ( J ) are decreased. The energy storage density ( U e ) of 10 wt% T@U/P composite film is 4.51 J cm −3 and the charge and discharge efficiency ( η ) is 84.61% at 150 kV mm −1 . These results indicate that the dielectric properties of UiO-66 can be significantly enhanced by using titanium dioxide as an insulating layer. Highlights By introducing UiO-66, the ɛ r of PVDF material is improved. Modifying UiO-66 with TiO 2 can improve its breakdown strength significantly. The U e of the T@U/P-10 composite modified with UiO-66 is 4.51 J cm −3 .
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Zhiqiang Zhang,Fan Zhang,Yiwen Niu,Meiyue Li,Jihang Liu,Zhan Jie Wang
Dielectric capacitors typically require high electric fields to achieve excellent energy storage density, which limits the integration, miniaturization, and lifespan of energy storage devices. Therefore, it is essential to obtain good energy storage properties at a lower electric field. In this study, (Ag 0.94 La 0.02 )(Nb 0.85 Ta 0.15 )O 3 (ALNT)-modified (Bi 0.5 Na 0.5 )TiO 3 -based ceramics with improved energy storage characteristics were designed and prepared. The introduction of ALNT is conducive to optimizing the polarization, adjusting the phase composition, disrupting the long-range ferroelectric ordering, and enhancing the dielectric relaxation behavior, leading to an increase in the polarization difference. Accordingly, superior recoverable energy storage density of 3.07 J/cm 3 and high efficiency of 82.7% are synchronously realized under a lower electric field of 150 kV/cm in a 5 mol% ALNT system. In addition, the corresponding sample exhibits wide thermal (40–100°C) and frequency (10–100 Hz) stability and good charge–discharge properties. This study provides a new candidate material for advanced dielectric capacitors that can be applied in lower electric fields.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Keyu Chen,Ruiqi He,Jiacheng Guo,Lu Ye,Xi Chen,Changning Ran,Xinrui Yan,Jianjun Zhang,Sude Ma
(1- x ) BaTiO 3 – x Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ( x = 0.00, 0.06, 0.12, 0.20,molar ratio) ceramics were prepared by solid sintering method. The effects of Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 (BMZT) doping on microstructure, dielectric, ferroelectric and energy storage properties of BaTiO 3 (BTO) were studied. With BMZT addition, the sintering temperature gradually decreases, the grain size reaches a minimum at x = 0.12 and the phase structure changes from tetragonal to cubic. And dielectric properties changed from temperature-dependent to temperature-insensitive. Additionally, higher cubic phase content induced slim polarization and electric field (P-E) loop and low remnant polarization (P r ). Therefore, 0.88 BaTiO 3 - 0.12 Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ceramics achieved recoverable energy storage density (W rec ) of 702.7 mJ/cm 3 and high energy efficiency of 87.3 % under electric field of 93 kV/cm. It exhibited optimum properties, including a minimum grain size (0.620 μm), superior dielectric properties (ε r = 1811.3, tanδ = 0.0552 at 1150 °C), a high maximum polarization strength (14.3 μC/cm 2 ), and the maximum dielectric breakdown strength (93 kV/cm), as identified in the present study. It simultaneously maintains high energy storage density and efficiency over a wide electric field range and large temperature range (room temperature - 90 °C). Thus (1- x ) BaTiO 3 – x Bi(Mg 0.25 Zn 0.25 Ti 0.5 )O 3 ceramics are a promising material for energy storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2024
·
IF 8.3
Kun Wei,Jianhong Duan,Gaosheng Li,Huifen Yu,He Qi,Hao Li
Multi-phase NaNbO 3 (NN) exhibits high adjustability on the ordering of both polarization and oxygen octahedral tilt, becoming a perfect carrier to design heterogeneous structure for boosting comprehensive energy storage properties. To balance the energy storage density and efficiency, the coexistence of the relaxor antiferroelectric (AFE) with high polarization capability and the relaxor ferroelectrics (RFE) with high efficiency is designed in this work by introducing Sr 0.7 Bi 0.2 □ 0.1 Ti 0.75 Ta 0.2 □ 0.05 O 3 (SBTT) into NaNbO 3 -BiFeO 3 . As a result, an outstanding capacitive energy density ( W rec ) of 12.25 J cm −3 with a high η of 83 % can be achieved in NN-BF-SBTT ceramic, which can be identified as a novel heterogeneous coexisting structure with the crossover of high polarization capability in relaxor AFE and high efficiency in RFE in terms of high-resolution TEM. Furthermore, grain refinement and the dense structure inhibit the leak current, suppress the concentration of oxygen vacancy defects and raise the activation energy ( E a ), thus enhancing the E B . These excellent energy storage properties overcome the trade-offs between the two sets of parameters ( W rec - η , Δ P - E B ), offering a refreshing strategy for the development of high-performance ceramic capacitors.
研究领域:
材料科学
·
能源存储技术
·
陶瓷材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jitong Wang,Xinru Nie,Zhanhui Peng,Xiaoping Lei,Pengfei Liang,Zupei Yang,Xiaolian Chao
Lead-free antiferroelectric (AFE) NaNbO 3 (NN) is one of promising materials for dielectric capacitors, but the recoverable energy-storage density and efficiency get restrained owing to huge remanent polarization and limited dielectric breakdown field strength . In this work, a variety of NN based lead-free bulk (1- x )NaNbO 3 - x La(Mn 0.5 Ni 0.5 )O 3 (abbreviated as (1- x )NN- x LMN, x = 0, 0.05, 0.10, 0.15, 0.20) ceramics were designed using a solid-state synthesis method. Remarkably, an ultra-fast charge-discharge speed 47 ns and an acceptable recoverable energy-storage density W rec ~1.77 J/cm 3 with a high efficiency η = 77% were obtained under the E b of 200 kV/cm at x = 0.05. The superior energy storage performance is attributed to the regulation of domain size and voltage resistance by special ions substitution of A and B sites. This work not only proposes an efficient strategy to realize high recoverable energy-storage density and efficiency, but also provide an candidate material for application of advanced pulsed power capacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Weipeng Liu,Zhen Liu,Lei Zhao,Yongzhi Wang,Mengwei Tian,Qibin Yuan,Hu Nan,Kongjun Zhu,Jing Wang
Dielectric energy storage capacitors play a pivotal role in advanced electronics and power devices due to their superb power density and fast charge-discharge characteristics. A synergistic elevation of energy storage density and efficiency stands as an indispensable precondition for downsizing devices and expanding their functional versatility. In the present work, guided by the phase field simulation, the synergistic optimization of phase and entropy engineering is realized in (1- x ) (Ag 0.71 Bi 0.07 Sr 0.04 )(Nb 0.85 Ta 0.15 )O 3 - x (0.85NaNbO 3 -0.15BiFeO 3 ) ceramics. With the greatly enhanced maximum displacement and breakdown strength, suppressed remnant displacement and hysteresis, an ultrahigh recoverable energy storage density of 13.5 J cm −3 with the efficiency of 81.7% is achieved, attaining the peak value of bulk AgNbO 3 -based ceramics. This strategy offers a reasonable and universal approach to enhance the energy storage performance in dielectrics featuring diverse phase structures.
研究领域:
材料科学
·
凝聚态物理
·
电气工程
·
陶瓷材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Ming-Sheng Zheng,Yu-Ting Zheng,Jun-Wei Zha,Yu Yang,Peng Han,Yong-Qiang Wen,Zhi-Min Dang
The low permittivity of the polypropylene (PP) film has become a barrier for the further development of film capacitors with high energy storage density . An advanced strategy of the high-permittivity filler/polymer nanocomposite turns out to be a promising way of solving this problem. In this work, we coated ethylene propylene diene monomer (EPDM) as the shell on the surfaces of BaTiO 3 successfully to fabricate core-shell structural nanoparticles . The addition of surface rubberized BaTiO 3 into PP matrix promotes the permittivity to about 5.8, while the dielectric loss is barely changed as compared with PP itself. In addition, the elongation at break is as high as 364%, which is over 4 times higher than that of PP. The influences of shell thickness (3 nm, 5 nm and 7 nm) for the nanoparticles and hot-stretching process for the nanocomposite films were also carefully investigated, both of which greatly affected the properties of nanocomposites. Finally, the optimum breakdown strength as high as 370 MV/m is obtained, leading to a maximum energy density of 3.06 J/cm 3 , which can be attributed to both high breakdown strength and high permittivity of the core-shell structural BaTiO 3 /PP nanocomposites.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Fei Yang,Denghui Shao,Taokai Liang,Mengzhe Hou,Bihui Zhang,Yizhuo Li,Weijin Hu,Xiaofang Li,Yanchun. Hu,Dawei Zhang,Xianwei Wang
The Pb 1–1.5x La x Zr 0.95 Ti 0.05 O 3 films with different La 3+ contents were successfully prepared on the LaNiO 3 /SiO 2 /Si substrates by sol-gel method. The effect of La 3+ doping on the microstructure, electrical properties, and energy storage performance of the films are systematically investigated. It is found that the introducing of La 3+ with a smaller tolerance factor could enhance the lattice distortion and compressive stresses, leading to smaller grain size, slimmer electric hysteresis loops, and lower phase transition field hysteresis. As a result, a relatively high energy storage density of 30.2 J/cm 3 together with the energy storage efficiency of 62.2% has been achieved in Pb 0.82 La 0.12 Zr 0.95 Ti 0.05 antiferroelectric thin films with the optimum doping content. This improvement is largely attributed to the enhanced breakdown field strength from 1442 kV/cm to 1564 kV/cm as a result of grain size reduction. Our results demonstrate the crucial role of decreased tolerance factor in stabilizing the antiferroelectric phase and enhancing the phase transition electric field, and provide an effective route to enhance the energy storage performance of antiferroelectric thin films.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Rui Ge,Jing Yang,Shuang Zeng,Yuanyuan Zhang,Wei Bai,Xiaodong Tang
Dielectric capacitors are vital components in advanced electrical power systems due to their high power density. However, how to improve their comparatively low energy density is still a major challenge. In this work, we designed a dielectric capacitor with a multilayer structure by inserting different numbers of ferroelectric (Na 0.8 K 0.2 ) 0.5 Bi 4.5 Ti 4 O 15 (NKBT) layers into relaxor ferroelectric Bi 4 LaTi 3.5 Mg 0.5 O 15 (BLTM). Through the regulation of interface engineering, that is, the joint effects of electrical field amplifying, interlayer coupling, and block layer at the interface, enhancing the energy storage density and breakdown field in (NKBT/BLTM) N capacitors. A giant energy density ( W rec ) of 81.2 J/cm 3 and a high breakdown electric field of 4074 kV/cm are achieved in capacitors with N = 4. Consequently, interface engineering can be promoted as a universal route to optimize the energy storage performance of dielectric capacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Chaolong Li,Feng Wang,Hao Wang,Boying Wang,Xinru Sun,Xingcan Peng,Weikun Li,Chunli Diao,Haiwu Zheng
To meet the demand for miniaturization and integration of electronic and electrical equipments, developing dielectric capacitors with excellent energy storage properties is of utmost importance. Bi 0.5 Na 0.5 TiO 3 -based ceramics have been investigated extensively for potential energy storage applications. However, its low breakdown strength E b and high remnant polarization P r limit the energy storage density and efficiency ( η ). Therefore, we explored a synergistic design strategy of domain control and grain size adjustment via La doping to successfully synthesize 0.8Bi 0.5 Na 0.5 TiO 3 -0.2NaNbO 3 - x La 2 O 3 (0.8BNT-0.2NN- x La 2 O 3 ) ceramics with superior energy storage properties to overcome above issues. It shows that the composition regulation by antiferroelectric NaNbO 3 results in improved disrupted long rang order ferroelectric domain structure, effectively promoting the formation of polar nanoregions, subsequently weakening P r and enhancing relaxation behavior. The introduction of antiferroelectric NaNbO 3 effectively improves the η of the system. Moreover, the grain size is decreased and densification is enhanced after La tailoring, which is beneficial for the E b and recyclable energy storage density ( W rec ). Finally, a high W rec of 4.40 ± 0.20 J/cm 3 and η of 80.1 ± 2.1% at 450 kV/cm are obtained in 0.8BNT-0.2NN-0.07La 2 O 3 ceramic. Besides, the sample demonstrates admirable temperature stability (25–175 °C) and frequency stability (10–100 Hz). Simultaneously, it displays stable discharge energy density, rapid discharge time of 0.36 μs, and good fatigue endurance (10 5 cycles). The results offer useful guidance for the design of novel ceramic capacitors with comprehensive energy storage performance.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Yang Cui,Tiandong Zhang,Yu Feng,Changhai Zhang,Qingguo Chi,Yongquan Zhang,Qingguo Chen,Xuan Wang,Qingquan Lei
In this study, the ferroelectric polyvinylidene fluoride (PVDF) blended with linear dielectric polymethyl methacrylate (PMMA) is chosen as polymer matrix (named as PMMA/PVDF). The effect of PMMA content and differently structured fillers on the microstructures and electrical properties of PMMA/PVDF-based composites have been investigated. The inorganic 0.5Ba(Zr 0.2 Ti 0.8 )O 3 - 0.5(Ba 0.7 Ca 0.3 )TiO 3 fibers (abbreviated as BCZT), BCZT embedded with Ag particles (BCZT+Ag), and core-shell structured BCZT+Ag@Al 2 O 3 fibers as fillers were designed and prepared by electrospinning technology. As the insulating Al 2 O 3 shell layer could relieve the dielectric difference between the BCZT and polymer matrix and confine the mobility of carriers provided by Ag, the energy storage density and efficiency are 4.02 J/cm 3 and 78.0% for the 3 vol% BCZT+Ag@Al 2 O 3 /40% PMMA/PVDF composites at an electric field of 320 kV/mm. To further improve the energy storage properties of the single-layered composites, the sandwich-structured composite films have been designed to improve the breakdown strength . The results show that the energy storage density and efficiency of sandwich-structured composite film with 40 wt% PMMA/PVDF as outer layer and 3 vol% BCZT+Ag@Al 2 O 3 /40% PMMA/PVDF as inter layer are 9.6 J/cm 3 and 69.8%, respectively, at an electric field of 400 kV/mm. This work presents an effective way to improve the energy storage properties of inorganic/polymer composites.
研究领域:
材料科学
·
电介质物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 7
·5814-5819
·
IF 2.324
Diao Chunli,Liu Hanxing,Hao Hua,Cao Minghe,Yao Zhonghua
Mn-doped barium strontium titanate Ba 0.4 Sr 0.6 TiO 3 - x mol%Mn ( x = 0, 1, 3 and 5; BSTM x ) thin films were deposited on Pt/Ti/SiO 2 /Si(100) substrates by spin-coating and annealed at 800 °C. X-ray diffraction patterns revealed that all the thin films were a typical cubic perovskite structure and no impurity peaks were observed. The effect of Mn doping on the ferroelectric properties and energy storage performance of the samples was investigated. The results showed that the recoverable energy storage density U rec and the difference ∆ P ( P max − P r ) between maximum polarization P max and remnant polarization P r firstly increased, then decreased with the increase of Mn doping amount. The optimized energy storage performance was obtained in Pt/BSTM3/Pt thin films: energy storage density of 8.48 J/cm 3 and energy storage efficiency of 42.4% at 1.63 MV/cm, electrical resistivity of 4.19 × 10 10 Ω cm and leakage current density of 7.77 × 10 −6 A/cm 2 at 163 kV/cm. Moreover, the effect of different top electrodes on energy storage performance was studied, which displayed that the energy density of Au/BSTM3/Pt films was higher than that of Pt/BSTM3/Pt films. The results indicated that Mn doping and Au electrodes could be effective ways to improve the energy storage properties of BST thin films.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）