Materials Today
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2024
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IF 21.1
Yu Wei,Xiang Li,Zhe Yang,Jiajia Shao,Zhong Lin Wang,Di Wei
Contact electrification (CE) is a well-known phenomenon that ubiquitously exists in the charge transfer between solid–solid (S-S) or solid–liquid (S-L) and plays pivotal roles in energy harvesting and self-powered sensing. However, little is known about the CE mechanism during the phase transition. Here, we investigated the mechanism of charge transfer between a representative crystalline ice and a dielectric material during the solid-to-liquid phase transition. This study aimed to determine how the phase transition affects the charge transfer efficiency. Before ice starts melting, electron transfer within S-S contact predominated. As the melted micro-droplets smoothed the rough surface of the ice, the contact area between the materials increased, resulting in a roughly 6-fold enhancement of charge transfer. When the ice melted, droplets condensed on the surface and established S-L contact with the dielectric material. It resulted in the formation of an electrical double layer (EDL) composed of ions and electrons at the contact interface, effectively shielding the surface net charge of the dielectric material and impeding charge transfer between the materials. After the complete melting of ice into water, a stable S-L contact was established, and the EDL formed a stable and strong screening effect, resulting in the lowest level of charge transfer. The findings contributed to enhancing knowledge about interaction and charge transfer between different substances in dynamic phase transition scenarios. It could also provide valuable insights into the optimization and advancement of CE-based triboelectric nanogenerators for energy harvesting and self-powered sensing.
研究领域:
物理学
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材料科学
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DOI
高影响因子
MATERIALS LETTERS
·
2022
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IF 3.574
Shuimiao Xia,Zhicheng Shi,Liang Sun,Shengbiao Sun,Davoud Dastan,Runhua Fan
High dielectric materials are widely used in electronic devices, but their applications are severely hindered by the high loss and low breakdown strength. Herein, a layered structure is designed to effectively suppress the loss and enhance the breakdown strength of high dielectric materials. In the design, the high dielectric films are stacked with linear dielectric films, which can not only form breakdown barriers between adjacent layers but also reduce the leakage conduction loss. As a result, an obvious suppression of loss from 0.13 to 0.05 at 100 Hz, along with a significant increase of breakdown strength from 138 kV/mm to 413 kV/mm, are successfully achieved.
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
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Fan Yongbo,Qu Wanbo,Qiu Haifa,Gao Shuaibing,Li Lu,Lin Zezhou,Yang Yuxuan,Yu Junyi,Wang Lin,Luan Saiwei,Li Hao,Lei Lin,Zhang Yang,Fan Huiqing,Wu Haijun,Yu Shuhui,Huang Haitao
Electrostatic capacitors are critical components in the power system of electric vehicles (EVs). The current commercially available solutions are largely based on ferroelectric oxides of which the permittivity decrease with increasing electric field. Here, we propose a high entropy modulation design in a quantum paraelectric-ferroelectric/antiferroelectric matrix, which enables a stable and field-independent energy charge/discharge response across a wide voltage range. By effectively synergizing the high efficiency (η) of quantum paraelectrics and the high polarization of the ferroelectric/anti-ferroelectric matrix with the entropy regulator, a high recoverable energy density (W rec ) of 13.3 J cm − 3 with an η of 92.4% is achieved in the bulk state of the perovskite material, promising for device scale-up. Versatile polar regions as well as a defect-less microstructure is achieved by the optimized compositional design and material processing. On a mesoscopic level, the electrical microstructure of the material is engineered to provide a large breakdown strength ( E b ) of 750 kV/cm, which is confirmed by the resolved electrochemical information and finite-element simulation. The proposed strategy provides a new path for designing high performance next generation energy storage/power converting dielectrics. This demonstration of quantum paraelectrics for energy storage application is expected to stimulate extensive efforts in the area.
研究领域:
材料科学
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能源技术
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物理学
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DOI
PubMed
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Rui Wang,Huasong Xu,Sang Cheng,Jiajie Liang,Bin Gou,Jiangang Zhou,Jing Fu,Congzhen Xie,Jinliang He,Qi Li
Polymer dielectrics have been widely used for capacitive energy storage. However, the volumetric energy density of polymer dielectrics is generally low, which falls short of the need for high-power and compact-size electronic devices and electrical systems . Here, a scalable all-organic composite based on a ferroelectric polymer incorporated with an abundant, cost-effective organic molecule, i.e. , glucose is reported, exhibiting record dischargeable energy density (37.7 J/cm 3 ) that outperforms the state-of-the-art dielectric polymer composites . The glucose molecules rich in hydroxyl groups are found to facilitate the formation of a physically cross-linking network of hydrogen bonds within the polymer matrix , which is responsible for the remarkable performance improvement. Both simulation and experimental results show that the hydrogen bonds serve as the trapping sites of charge carriers and suppress conduction loss . The hydrogen bond network is also found to account for the increased crystallinity , reduced crystallite size , and stabilized γ phase in the polymer, which leads to enhanced electric displacement and reduced hysteresis loss . In combining the advantages of extraordinary energy storage performance, abundant raw materials, ease of preparation, this approach is viable for large-scale production of polymer-based high-energy-density dielectric materials.
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
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 44
·12001-12005
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IF 5.976
Huihong Jiang,Zhuoting Huang,Guobiao Xue,Hongzheng Chen,Hanying Li
Dielectric material design is challenging for the fabrication of n-channel organic field-effect transistors (OFETs). Hydroxyl groups in dielectrics have been found to intensively trap electrons and completely eliminate electron transport in a variety of structurally disordered organic semiconductors, which generally excludes the widely used hydroxyl-containing dielectrics from n-channel OFETs. Here, we show that electrons are clearly more mobile at the interface of organic semiconductors and hydroxyl-containing dielectrics, including silica, polyvinyl alcohol (PVA) and poly(4-vinyl phenol) (PVP), when single-crystalline C60 or 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) are used as semiconductors in OFETs. With regards to C60, an electron mobility larger than 1 cm2 V−1 s−1 has been achieved, indicating that the hydroxyl groups have a limited trapping effect on electron transport. Electron trapping becomes more intensive either by exposing the dielectric/device to air or by increasing the hydroxyl density in the dielectrics, suggesting that the trapping effect is associated with water absorbed by the dielectrics. By showing their limited negative effect, this work suggests that the widely used, easily accessible and well-known hydroxyl groups might be incorporated into organic electronic materials for n-channel OFETs and complementary circuits fabricated in a glove box.
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
Polymer Chemistry
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2021
·Vol. 12
·期 33
·4812-4821
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IF 5.582
Yudi Feng,Ke Jin,Jia Guo,Changchun Wang
The development of the modern microelectronic industry calls for low permittivity interlayer dielectric materials with excellent thermal stabilities, robust mechanical strength and matching processability. Traditionally, it is difficult to fabricate materials with low k values, high heat endurance, high modulus and good processability simultaneously. Herein, we prepared two novel hydrocarbon precursors with dibenzocyclooctene (DBCOD) and thermo-crosslinkable benzocyclobutene (BCB) units by group transformation and cross-coupling reactions. These precursors can be cured at elevated temperatures to give crosslinked all-aliphatic/aromatic-ring structures. The low-polarizable hydrocarbon skeletons possess low dielectric constants (Dk = 2.66/2.54, respectively) and superior hydrophobicity (high water contact angle of ∼113°/125° and low water uptake of 0.10%/0.37%). Moreover, the rigid crosslinked cyclic structures render significantly high thermostability and mechanical modulus, such as very high glass transition temperatures (Tg > 380 °C/369 °C), high 5% weight loss temperatures (Td,5% = 499 °C/492 °C), low coefficient of thermal expansion of 41.7/41.8 ppm K−1, and storage modulus of 3.7/3.8 GPa, respectively. The enhanced comprehensive performances make the all-carbocycle hydrocarbon resins good candidates for next-generation interlayer dielectrics.
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
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
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2025
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IF 2.7
Xiaokang Guan,Chencheng Wei,Xiaowen Yan,Renato Zenobi
Dielectric barrier discharge ionization (DBDI) for mass spectrometry (MS) is still limited in terms of the upper mass range, the polarity of compounds that can be readily ionized, and thus the sensitivity. In this study, we studied the influence of several parameters, including the geometry and nature of the electrode and dielectric materials, on the performance of a DBDI source. We found that the electrode material had almost no impact on the ionization capability of DBDI. With increasing dielectric constant ϵ of the dielectric material, an improved performance could be achieved in terms of the mass range of ionizable molecules, which was found to be solely dependent on the choice of dielectric material. Increasing the voltage had little effect on expanding the mass range but instead produced more fragment ions. We were also able to ionize more polar compounds: the detection of nonapeptide-1 and the tryptic fragments of human serum albumin (HSA) became possible using DBDI-MS with a high-ε dielectric. The Table of Contents graphic depicts that with an increasing permittivity dielectric improved performance can be achieved in terms of the mass range of ionizable molecules.
研究领域:
分析化学
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质谱学
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电离技术
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DOI
PubMed
高影响因子
PHYSICA SCRIPTA
·
2024
·Vol. 99
·期 10
·105988
·
IF 2.6
Bin Rong,Wei Zhao,Yi Liao,Yixiao Zhang,Yangyang Zhu,Wei Shi,Bin Wei
Organic field-effect transistors (OFETs) incorporating hybrid high-κ inorganic Al2O3 and polymer dielectrics, including polyvinyl alcohol (PVA), polystyrene (PS), or polymethyl methacrylate (PMMA), through solution-processing techniques were fabricated. The analyses revealed that the high surface energy and hydrophilicity property of Al2O3 and PVA, and the relatively hydrophobic property of PS surface, hindered the performance of corresponding OFETs. The Al2O3/PMMA-based OFET achieved the optimized performance, with a threshold voltage of −2.7 V, a hole carrier mobility of 0.056 cm2/Vs, and a current on/off ratio of 1.0 × 104 at a low operating voltage of −5 V. Through analyzing the characteristics of leakage current, capacitance, contact resistance, and trap density of OFETs, we found that the PMMA-engaged films possessed the optimized electrical properties. The introduction of PMMA eliminated the interfacial trapping, thereby lowering the threshold voltage and enhancing the performance of the device. The COMSOL Multiphysics simulation was conducted to confirm the physical mechanism. The strategy of utilizing Al2O3/PMMA hybrid dielectric could simultaneously ensure the low operating voltage and good performance of OFET, while guaranteeing the low leakage current by the thick PMMA.
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
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Guoming Yuan,Hui Yang,Kunxin Wang,WenJie Diao,Enxiang Jiao,Zhijun Liu,Zhao Li,Kun Wu,Jun Shi
With the development of the microelectronics industry and the increasing concern for sustainability, there is an urgent need to prepare low dielectric materials from bio-based feedstocks . In this work, an allylated-magnolol (A-M) was synthesized as a crosslinker for fluorinated polymethylhydrosiloxane (F-PMHS) to obtain a low dielectric polysiloxane (M/F-PSO). M/F-PSO exhibited excellent dielectric properties with a dielectric constant of 2.73 and a dielectric loss of 0.0074 at 100 MHz. This was mainly attributed to the synergistic effect of the hard-polarization C F bond and the hindering molecular stacking structure of biphenyl. In addition, M/F-PSO had good hydro-oleophobicity (θ water = 108° and θ glycol = 105°), which is brought about by the low surface energy CF 3 and the rigid hydrophobic structure of A-M. The water absorption of M/F-PSO was only 0.13 % after 48 h immersion in deionized water . Owing to the introduction of rigid structure and good dispersion of A-M in F-PMHS, the tensile strength of M/F-PSO was up to 5.00 MPa, which is 432 % higher than that of pure polysiloxane (PSO). Moreover, the thermal stability of M/F-PSO was comparable to that of PSO, with an initial decomposition temperature (T d, 5% ) as high as 440.30 °C. These results demonstrated the feasibility of introducing renewable bio-resource magnolol into polysiloxane to prepare low dielectric materials with excellent hydro-oleophobicity and mechanical properties .
研究领域:
材料科学
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化学工程
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可持续发展
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yuhui Xu,Dongfang Pang,Tao Li
Bi 0.5 Na 0.5 TiO 3 -BaTiO 3 (BNT-BT) relaxor ferroelectric system has been highly regarded for its superior performance. BiScO 3 (BS) component was added into BNT-BT to construct medium entropy (1.53R < 1.61R) ternary ferroelectric ceramics for the excellent energy storage performance. The effect of BS on the energy storage performance for BNT-BT ceramics were investigated systematically. Indeed, the introduction of BS causes the reduction of ferroelectric long-range order and delayed polarization saturation, which results from a higher maximum polarization ( P max ) and reduced remanent polarization ( P r ) after the increase of entropy value. Meanwhile, twice firing porcelain method was employed to refine the grains and improve the breakdown electric field strength ( E b ). Currently, E b of the 0.60BNT-0.21BT-0.19BS (BNT-BT-0.19BS) ceramic are improved to 200 kV/cm, the recoverable energy density W re c is 4.22 J/cm 3 , and the efficiency η is 86.83 %. It also maintains excellent temperature stability ( ΔW rec %≤2.2 % within the temperature range of 25 ∼ 150 °C) and fatigue resistance ( ΔW rec ≤ 0.03 J/cm 3 after 10 6 cycles). Especially, BNT-BT-0.19BS ceramic has good charging-discharging characteristics, with a t 0.9 of 84 ns at room temperature. Appropriate increase of ΔS config in ferroelectrics is beneficial for improving energy storage characteristics, this provides guidance for designing high-performance lead-free dielectric energy storage materials.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 50
·505711
·
IF 3.874
Shaojie Wang,Zhen Luo,Jiajie Liang,Simin Peng,Jun Hu,Jingliang He,Qi Li
Nanoscale mapping of electric polarizability in a heterogeneous dielectric material with surface irregularities is of scientific and technical significance, but remains challenging. Here, we present an approach based on intermodulation electrostatic force microscopy (EFM) in conjunction with finite element computation for precise and high-resolution mapping of polarizability in dielectric materials. Instead of using electrostatic force in conventional quantitative EFM approaches, the force gradient is acquired to achieve an unprecedented spatial resolution. In the meantime, the finite element model is applied to eliminate the interference from the heterogeneity and surface irregularity of the sample. This approach directly reveals the high polarization ability of the amorphous region in a ferroelectric, semi-crystalline polymer with significant surface roughness, i.e. poly (vinylidene fluoride-co-chlorotrifluoroethylene), in which the result is consistent with the predicted data in the latest research. This work presenting a quantitative approach to nanoscale mapping of electric polarizability with unprecedented spatial resolution may help to reveal the complex property-structure correlation in heterogeneous dielectric materials.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xuesong Hao,Xueying Liu,Yuhao Wang,Wenpeng Zang,Wenju Wu,Yingjie Jiang,Nanying Ning,Ming Tian,Liqun Zhang
In the quest for sustainable and renewable energy sources, researchers and engineers have explored innovative technologies to harvest energy from various environmental sources. Dielectric elastomer generators (DEGs) with high energy harvesting performance have been proven to be promising energy collectors, but achieving a high dielectric constant (ε’) and low electrical conductivity (EC) under high electric fields of dielectric elastomer (DE) simultaneously is a struggle, which poses significant challenges. In this study, high-content carboxyl group-grafted liquid polybutadiene (HCPB) is synthesized and then adopted as an organic dielectric filler to blend and cocross-link with a butadiene rubber (BR) matrix to prepare DE composites with high energy harvesting performance. The introduction of carboxyl groups enhances polarization while trapping free Al3+ in the matrix, which revolutionarily achieves a significant increase in ε’ under extremely low EC. Ultimately, the contradiction between increased ε’ and decreased EC under high electric fields is reconciled, resulting in a 30 HCPB/BR composite with high energy density (w = 91.9 mJ/cm3) and fine power conversion efficiency (PCE = 24.1%). This advancement paves the way for the development of HCPB/BR composite-based DEGs with enhanced ε’ and energy harvesting performance.
研究领域:
材料科学
·
能源技术
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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）