JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Jing Wang,Xinhong Wan,Yu Rao,Lei Zhao,Kongjun Zhu
Silver niobate AgNbO 3 ceramics have been regarded as a promising lead-free material for energy storage applications. In present work, pure and fine AgNbO 3 powders were successfully fabricated via the hydrothermal method using AgNO 3 as the raw material. It is found that the reaction products show strong dependence on the molar ratio of NH 4 HF 2 :AgNO 3 :Nb 2 O 5 , pH value and reaction time. Pure AgNbO 3 powders were obtained when the process conditions are 3NH 4 HF 2 :2AgNO 3 : x Nb 2 O 5 with x ≤0.85 or y NH 4 HF 2 :2AgNO 3 :1Nb 2 O 5 with y = 4–5, pH = 5 and reaction time t ≥ 10 h. Benefitting from the hydrothermal synthesised AgNbO 3 powders, AgNbO 3 ceramics with fine-grain of ∼3.4 μm were obtained. The fine-grain leads to increased electric breakdown strength E b up to 250 kV/cm, which is the highest among the pure AgNbO 3 ceramics to our best knowledge. The further enhancement in E b and recoverable energy density could be highly anticipated if the antiferroelectric phase could be stabilized.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Matter
·
2025
·
IF 17.5
Cuiying Ye,Di Liu,Yikui Gao,Fan Liu,Hongxuan Xu,Tao Jiang,Zhong Lin Wang
Electrification at water-solid interfaces, which enhances interfacial physical and chemical reactions, plays a crucial role in energy fields. However, the fundamental limits on charge transfer due to contact electrification (CE) at these interfaces remain poorly understood. Here, we first demonstrate electrostatic breakdown (EB) in the vicinity of liquid-solid-gas interfaces, which is attributed to the enhanced electric field in the gas close to the triple-phase contact line. Furthermore, we discover the significant impact of distant conductors on the interface electric field depending on their locations and grounding statuses and observe two types of breakdowns. Guided by an established physical model of breakdown, we achieve a record-high charge density of 1.36 mC m −2 in CE at water-insulator interfaces. Finally, we show the broad impact of EB on energy harvesting, surface wettability, and droplet motion at water-insulator interfaces. This previously unexplored EB phenomenon could offer new insights into interfacial charge and energy exchange at water-solid interfaces.
研究领域:
能源科学
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材料科学
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表面物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 7
·4846-4853
·
IF 3.5
Shunshun Jiang,Ji Zhang,Dmitry V. Karpinsky,Jinglei Li,Lisha Liu,Yaojin Wang
As one of the important electronic components, the dielectric capacitors for energy storage applications have been extensively studied in recent years. Among various dielectric materials, the perovskite oxide Bi 0.5 Na 0.5 TiO 3 -based ceramics have become promising candidates due to their high polarization, dielectric tunability, environment-friendly composition, and so forth. Herein, the relaxor ferroelectric ceramics of Bi 0.5 Na 0.5 TiO 3 –SrTiO 3 –Bi(Mg 0.5 Zr 0.5 )O 3 were prepared via solid-state reaction method. The sample with optimal composition not only retains the high polarization by introducing Bi 3+ ions, but also achieves the reduced remanent polarization by enhancing relaxor behavior and the promoted electric breakdown strength by the grain size refinement. Accordingly, a high recoverable energy density of 8.3 J/cm 3 under 450 kV/cm and the superb charge/discharge properties (current density C D = 1200 A/cm 2 , power density P D = 150 MW/cm 3 , charge/discharge time t 0.9 = 0.15 µs) are achieved, revealing great prospect in energy storage applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 17
·4780
·
IF 3.623
Yushu Li,Yao Zhou,Sang Cheng,Jun Hu,Jinliang He,Qi Li
The development of high-energy-density electrostatic capacitors is critical to addressing the growing electricity need. Currently, the widely studied dielectric materials are polymer nanocomposites incorporated with high-dielectric-constant nanoparticles. However, the introduction of high-dielectric-constant nanoparticles can cause local electric field distortion and high leakage current, which limits the improvement in energy density. In this work, on the basis of conventional polymer nanocomposites containing high-dielectric-constant nanoparticles, oriented boron nitride nanosheets (BNNSs) are introduced as an extra filler phase. By changing the volume ratios of barium titanate (BT) and BNNSs, the dielectric property of polymer nanocomposites is adjusted, and thus the capacitive energy storage performance is optimized. Experimental results prove that the oriented BNNSs can suppress the propagation of charge carriers and decrease the conduction loss. Using poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) as the polymer matrix, the P(VDF-HFP)/BNNS/BT nanocomposite has a higher discharged energy density compared with the conventional nanocomposite with the freely dispersed BT nanoparticles.Keywords:discharged energy density;charge–discharge efficiency;electric breakdown;ferroelectric films;dielectric losses
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Keyu Lian,Shengdu Yang,Dianheng Lu,Wei Tang,Junhua Zhang
Substantial interest in producing thermosets and photoresponsive chemicals from bioresources is garnering, yet moderate performance drastically confines their applicability in electronic packaging material. Herein, several thermosetting epoxy building blocks from lignin-derived monomers (vanillyl alcohol and eugenol) were constructed, and a range of lignin-based enhanced photocurable resins were further developed using acrylic acid and tetrahydrophthalic anhydride as modifiers by an one-pot synthesis method. The comprehensive performance of lignin-based functionalized photocurable resins was systematically investigated, such as their photopolymerization behavior, thermal–mechanical properties, and electrical breakdown properties. As a result, the biobased thermosetting resin stemming from vanillyl alcohol monomers fulfilled fascinating heat resistance (Tg ≈ 103.9 °C) and tensile strength (28.89 ± 4.39 MPa). Additionally, inspired by a tunable chain-extending tactic, the toughness and electrical breakdown strength of the biobased photo-cross-linked films were further intensified by the insertion of flexible alkyl chain segments between cross-linked sites. As proof of concept, the formulated EAAT green ink, consisting of photocurable resin and inorganic, demonstrated a superior patterning ability after alkali development. The rationally designed lignin-derived photo-cross-linked network strengthening mechanism reported here offers an important and universal strategy for significantly enhancing the comprehensive properties of biobased photocurable materials.
研究领域:
材料科学
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生物质化学
·
电子包装材料
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Zhipeng Wu,Jun Chen,D.W. Boukhvalov,Zhenyang Luo,Lijun Zhu,Yijun Shi
Triboelectric nanogenerator (TENG) can convert all kinds of mechanical energy into electricity. Comparing with the traditional electromagnetic generator (EMG), TENG has obvious higher efficiency in harvesting low frequency mechanical energy with advantages of much lower cost, smaller size and so on. However, TENG suffers unpredictable damages due to stretching, bending, compression, interface friction, electric breakdown, etc. Materials with self-healing properties provide a good solution to this problem. In this study, a new TENG was developed based on a new type polyurethane-based self-healing elastomer with good mechanical self-healing property (healing efficiency is about 96%) and excellent electric breakdown self-healing performance (healing efficiency is 90%). Self-healing mechanism study indicates that the excellent self-healing properties comes from a combination of intermolecular hydrogen bonding, weak and dynamic coordination bonds between Fe 3+ and pyridine rings. The developed TENG can generate an open-circuit voltage of 180 V, a short-circuit of 1.3 μA, and with a maximum power of 40 mW·m −2 . The developed TENG shows an excellent stability (no output performance degrading even after a 3000 cycles). It is also interesting to find that the output electrical properties of the developed TENG before and even after several times mechanical self-healing or electrical breakdown self-healing can be almost 100% restored to the original state.
研究领域:
材料科学
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能源技术
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2020
·
IF 4.495
Jiawei Zhang,Jian Wang,Dandan Gao,Huan Liu,Jiyang Xie,Wanbiao Hu
Ceramic-based capacitors for energy storage devices require simultaneously high energy density and efficiency. Achieving high electric breakdown field based on linear dielectrics is crucial. Here, A-site Sm 3+ doped perovskite Ca 1-1.5 x Sm x □ 0.5 x TiO 3 ceramics with introduced A-site vacancies ( V A ) were prepared. All Ca 1-1.5 x Sm x □ 0.5 x TiO 3 ceramics crystallize in an orthorhombic structure, with lattice constants a , b , and c linearly decreased. As a result of Sm 3+ dopants and V A , the grain size decreased while the ceramics’ density was improved. The permittivity decreases from 176 ( x = 0) to 135 ( x = 0.1), but tan δ is effectively constrained (∼10 −4 ). What’s more, the dielectric breakdown strength is significantly improved from 429 kV/cm ( x = 0) to 547 kV/cm ( x = 0.1) with dielectric linearity is maintained. The optimum energy storage density of 2 J/cm 3 ( x = 0.02) with ultrahigh energy efficiency of over 93.7 % is achieved, which are superior to many existing linear dielectrics and relaxor ferroelectrics. This work confirms the energy-storage enhancement through chemical modifications and microstructural engineering.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Wenyuan Li,Jianan Xu,Jia Chen,Yaxin Wei,Kai Li,Aimin Chang,Bo Zhang
Driven by the information industry, there is an urgent need for lead-free ceramic materials exhibiting excellent recoverable energy storage density (Wrec) and energy storage efficiency (η) to meet the practical application requirements of pulse power capacitors. Among these, Bi0.5Na0.5TiO3 (BNT) stands out as a highly promising and competitive environmentally-friendly ceramic material due to its exceptional dielectric properties. However, premature polarization saturation and low dielectric breakdown field (Eb) have been major obstacles to its practical application. Herein, the scheelite-structured La2WTiO8 (LWT) is successfully integrated with the perovskite-structured BNT to enhance the energy storage performance (ESPs) of BNT-based ceramics. The obtained results show that LWT doped into BNT matrix destroys the long-term ferroelectric order and effectively promotes the formation of polar nanoregions, which enhance Eb and delay polarization saturation. Ultimately, the optimized composition achieves the expected Wrec (∼6.3 J cm−3) and η (∼78.9%) at 400 kV cm−3 with excellent temperature stability (<9% variation in the temperature range of 20–200 °C) and frequency stability (∼2.8% variation in the frequency range of 1–100 Hz). In addition, a fast discharge performance of t0.9 ∼ 62.6 ns and a high power density of 105.71 MW cm−3 at 200 kV cm−1 are achieved. This work proposes a strategy to obtain high comprehensive ESPs of BNT-based ceramics, offering new prospects for the development of advanced pulse capacitors.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 47
·46837
·
IF 1.901
Junji Wei,Xiaojuan Meng,Xinyue Chen,Yafei Bai,Jiale Song,Ni Yan,Lei Zhu,Aiqin Shen
A new class of specialty polymer, fluorinated poly(arylene ether nitrile) (PAEN-F), was synthesized via the aromatic nucleophilic substitution reaction. Due to its rigid structure, PAEN-F exhibited enhanced heat resistance and thermal stability. Consequently, the glass-transition temperature and initial degradation temperature of PAEN-F reached as high as 179°C and 554°C, respectively. PAEN-F also showed excellent solubility in low-boiling solvents owing to fluorine groups and the nonplanar structure in the repeat unit. Due to its strong 6F dipoles, PAEN-F exhibited a high dielectric constant (ɛ r ) of 3.6, a high electrical breakdown strength of 346 MV/m, and a reasonably low dissipation factor (tan δ) of 0.014 at 25°C and 100 Hz. Therefore, this dipolar glass polymer is promising for high-temperature and low-loss electric energy storage applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46837.
研究领域:
高分子化学
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材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 10
·47158
·
IF 1.901
Yu Yang,Minhao Yang,Sumei Zhang,Xiang Lin,Zhi-Min Dang,Dongrui Wang
Dielectrics with the capability to sustain large electric fields and to repair electrical damages rapidly are attracting for advanced insulation systems. Herein we demonstrate, for the first time, polymer blends with a co-continuous structure can heal electrical-breakdown-damage under laser illumination. Polymer blends consisting of polyethylene (PE) and poly(ethylene- co -vinyl acetate) (EVA) plus a small amount of gold nanoparticles (AuNPs) were prepared via a solvent-assisted approach. The co-continuous structure was obtained by controlling the mass ratio of PE/EVA to 50/50 wt %. The PE/EVA blend showed a relatively high dielectric strength of 215 kV mm −1 at room temperature under a direct current electric field. The dielectric strength was slightly reduced to 202 kV mm −1 by incorporating with 0.42 wt % of AuNPs. Importantly, after electrical breakdown, the AuNPs-filled blend films were able to restore their dielectric strength to 80% of the initial values by laser irradiation for seconds. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47158.
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 EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Rong Lang,Qifan Chen,Tingting Gao,Jianguo Zhu,Jie Xing,Qiang Chen
Barium titanate (BaTiO 3 , BT) is widely used in capacitors because of its excellent dielectric properties . However, owing to its high remanent polarisation ( P r ) and low dielectric breakdown field strength ( E b ), achievement of high energy storage performance is challenging. Herein, a systematic strategy was proposed to reduce P r and elevate E b of BT via: (i) modification of the relaxor behavior by alloying it with Bi(Mg 2/3 Ta 1/3 )O 3 (BMT) and (ii) heightening E b by introducing NaTaO 3 (NT) with high band gap. Consequently, the energy storage efficiency ( η ) of 90 % and high E b of 780 kV cm −1 were achieved simultaneously for the BT-BMT- x NT system, which facilitated the recoverable energy density ( W rec ) of 6.02 J cm −3 . At 300 kV cm −1 , its temperature (20–120 °C) and frequency (1–500 Hz) stabilities were found to be good. Moreover, the BT-BMT-0.15NT possessed ultrafast discharge rate ( t 0.9 < 51 ns) and ultrahigh power density ( P D > 94 MW cm −3 ). This study offers an effective strategy for the design of novel high-performance dielectric energy storage materials .
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
·
2021
·
IF 4.527
Zhuo Yu,Jiangtao Zeng,Liaoying Zheng,Anthony Rousseau,Guorong Li,Abdelhadi Kassiba
Lead-free BiFeO 3 –BaTiO 3 –Bi(Mg 2/3 Nb 1/3 )O 3 (BFBT-BMN) ceramics with different grain sizes were fabricated by using a conventional solid-state reaction. The high-energy ball milling technique was utilized to obtain the fine-grained ceramics. The grain size reduction lowers the remanent polarization ( P r ) and enhances the dielectric breakdown strength ( E b ) leading to a drastic increase of the recoverable energy storage density ( W re ). For the fine-grained BFBT-BMN ceramics, W re greatly increases by 8 times from 0.16 J/cm 3 to 1.27 J/cm 3 , compared to the coarse-grained BFBT-BMN ceramics. Transmission electron microscopy (TEM) and piezo-response force microscopy (PFM) measurements revealed the occurrence of the polar nanoregions (PNRs) in the fine-grained BFBT-BMN ceramics. The dynamic and weakly correlated PNRs structure is responsible for the enhancement of recoverable energy storage density in the fined-grained BFBT-BMN ceramics. This work indicates that the grain size reduction is an effective way to modify the energy storage properties of BiFeO 3 -based ferroelectric ceramics .
研究领域:
材料科学
·
能源存储
·
电子显微学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）