INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Chengwen Gu,Fanchen Sun,Qitong Wang,Jiahui Li,Yi Zhao,Yunhe Zhang,Shouhai Zhang,Xigao Jian,Zhihuan Weng
Poly(aryl ether) (PAE) dielectrics have captured widespread interest in the domain of film capacitors primarily due to their exceptional high-temperature endurance, advantageous film-forming capabilities, and superior mechanical attributes. However, the conventional PAEs had a complicated film-forming process and low discharge energy density. In order to solve this problem, a poly(phthalazinone ether sulfone) (PPES) with phthalazinone structures is synthesized. Compared to the commercial polysulfone, the PPES exhibits significantly higher discharge energy density (Ue) and breakdown strength both at room temperature and elevated temperature. In particular, the Ue value of PPES (3.66 J/cm3) at 150 °C and 500 MV/m is even superior to that of commercially available bi-oriented polypropylene dielectric films, which are only 2.71 J/cm3 at room temperature and 450 MV/m. This investigation has demonstrated that the PPES films with phthalazinone structures are highly promising for energy storage under harsh conditions.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2021
·Vol. 104
·期 8
·4119-4130
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IF 3.784
Yu Huang,Liang Shu,Suwei Zhang,Zhen Zhou,Yue-Yu-Shan Cheng,Biaolin Peng,Lisha Liu,Yuanyuan Zhang,Xuping Wang,Jing-Feng Li
With the development of advanced electrical and electronic devices and the requirement of environmental protection, lead-free dielectric capacitors with excellent energy storage performance have aroused great attention. However, it is a great challenge to achieve both large energy storage density and high efficiency simultaneously in dielectric capacitors. This work investigates the energy storage performance of sol-gel-processed (K,Na)NbO 3 -based lead-free ferroelectric films on silicon substrates with compositions of 0.95(K 0.49 Na 0.49 Li 0.02 )(Nb 0.8 Ta 0.2 )O 3 -0.05CaZrO 3 - x mol% Mn (KNN-LT-CZ5- x mol% Mn). The appropriate amount of Mn-doping facilitates the coexistence of orthorhombic and tetragonal phases, suppresses the leakage current, and considerably enhances the breakdown strengths of KNN-LT-CZ5 films. Consequently, large recoverable energy storage density up to 64.6 J cm −3 with a high efficiency of 84.6% under an electric field of 3080 kV cm −1 are achieved in KNN-LT-CZ5-5 mol% Mn film. This, to the best of our knowledge, is superior to the majority of both the lead-based and lead-free films on silicon substrates and thus demonstrates great potentials of (K,Na)NbO 3 -based lead-free films as dielectric energy storage materials.
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
Journal of Energy Storage
·
2022
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IF 8.907
Hongmei Qin,Man Liu,Ziwei Li,Yuheng Fu,Jinhui Song,Jian Xie,Chuanxi Xiong,Shan Wang
Cycloolefin copolymer (COC) could be a best promising commercial polymer dielectric for metallized film capacitors at elevated temperature according to the molecular structure, but the dielectric energy storage about COC remains a huge challenge due to the lack of processing strategies of its ultrathin films . Herein, we demonstrate that COC dielectric film of around 10 μm can be fabricated by solution casting followed by uniaxial stretching and steadily service at 140 °C. Excitedly, the charge-discharge efficiency ( η ) of COC film is up to 97.8 % at 600 MV/m at 25 °C, which is superior to the commercially available biaxially oriented polypropylene (BOPP). Remarkably, at 140 °C, COC film exhibits a maximum discharge energy density ( U e ) of 2.32 J/cm 3 and a η of 85.7 %, far outperforming the heat-resistant polyimide (PI) with a maximum U e of 1.00 J/cm 3 and a η of 24.1 %. Our work provides a novel strategy for the manufacture of ultrathin COC film and could promote the commercialization of high-temperature polymer capacitor films for the energy storage.
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
Polymers
·
2025
·Vol. 17
·期 11
·1486
·
IF 4.9
Tingwei Mei,Mingtao Zhu,Hongjian Zhang,Yong Zhang
In recent years, dielectric films with a high energy-storage capacity have attracted significant attention due to their wide applications in the fields of renewable energy, electronic devices, and power systems. Their fundamental principle relies on the polarization and depolarization processes of dielectric materials under external electric fields to store and release electrical energy, featuring a high power density and high charge–discharge efficiency. In this study, sodium bismuth titanate (NBT) micro-flakes synthesized via a molten salt method were treated with hydrogen peroxide and subsequently blended with a polyvinylidene fluoride (PVDF) matrix. An oriented tape-casting process was utilized to fabricate a dielectric thin film with enhanced energy storage capacity under a weakened electric field. Experimental results demonstrated that the introduction of modified NBT micro-flakes facilitated the interfacial interactions between the ceramic fillers and polymer matrix. Additionally, chemical interactions between surface hydroxyl groups and fluorine atoms within PVDF promoted the phase transition from the α to the β phase. Consequently, the energy storage density of PVDF-NBT composite increased from 2.8 J cm−3to 6.1 J cm−3, representing a 110% enhancement. This design strategy provides novel insights for material innovation and interfacial engineering, showcasing promising potential for next-generation power systems.
研究领域:
能源材料
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高分子材料
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电子器件
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电力系统
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DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2018
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IF 2.687
Peng Qu,Xiaolin Liu,Sijing Wang,Chen Xiao,Shanshan Liu
Moderate dehydrofluorinated PVDF (MD PVDF) composed of polyene and untreated PVDF was produced by elimination reaction in polyvinyl pyrrolidone (PVP) and KOH aqueous solution. Dielectric films of MD PVDF were fabricated by solution casting method to study the energy density performance of the polymer. The energy density of MD PVDF was enhanced and the maximum energy density was 10.5 J/cm 3 at 450 kV/mm with an efficiency of 46%. The enhanced energy density was attributed to combined effects of high conductivity of polyene and charges blockage of untreated PVDF. This work may provide a new way to enhance the energy density performance of polymer dielectrics by moderate dehydrofluorination.
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
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jie Mao,Jianxiong Chen,Zhen Jia,Tianyu Wang,Hongyan Zhang,Xingxing Lv,Lijun He,Qikun Feng,Weike Wang,Faliang Luo,Yong Qin,Zhimin Dang
Nanocomposite dielectrics with heightened energy density exhibit promising prospects for energy storage implementations in contemporary electrical systems. However, high permittivity fillers usually lead to decreased breakdown strength of nanocomposites. Therefore, it is necessary to design the microstructure of nanocomposite dielectrics with balanced breakdown strength and permittivity for achieving optimal energy storage performance. In this work, an inorganic-organic hybrid dielectric materials with gradient permeable structures have been demonstrated though the multi-pulse infiltration (MPI) technology. The hybrid films enriched with TiO 2 can revive the low barrier caused by polymer surface defects and the TiO 2 penetration within the film can provide deep traps for electron capture, thereby enhancing the insulation performance of nanocomposite dielectrics. Additionally, the polar Ti–O bonds and the new ≡ Ti–F bonds can enhance the polarizability of the hybrid material and increase the permittivity. The maximum energy density of hybrid dielectric film in this work reached 21.9 J cm −3 at 623 MV m −1 with pretty low inorganic content, which was 97 % higher than that of pure polymer. This study presents an efficient method for creating high-energy-density polymer/ceramic hybrid films for dielectric energy storage applications.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Huijian Ye,Lianlian Chen,Huilei Jiang,Lixin Xu
Dielectric film capacitors have received extensive attention because of their fast release rate and great electrical reliability. A polymer film with large energy density and charge–discharge efficiency is required to expand the application of film capacitors at high temperatures. In this work, a series of ternary fluorinated polyimides (FPI) with different fluorine-containing ratios have been copolymerized to investigate the high-temperature electrical displacements. The fluoro-dianhydride monomer was introduced into the regular 4,4′-diaminodiphenyl ether polymerization system with accompanied thermal imidization. The FPI film exhibits large energy capability with intrinsic breakdown strength compared with pristine PI, which is ascribed to the strong electronegative effect and hydrophobic feature of –CF3 as well as the increase of free volume in bulk. The energy density of optimal FPI film reaches 20.2 J/cm3 at 659 MV/m, and the high-temperature energy storage property is improved, e.g., the energy density up to 11.5 J/cm3 with an external field of 525 MV/m at 100 °C. Low molar polarizability between C–F bonds also contributes to the decreased leakage current, which results in the large charge–discharge efficiency under high temperatures. The PI film with tailored fluorostructure demonstrates the competing candidate for the application of a high-temperature polymer film capacitor.
研究领域:
材料科学
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电气工程
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DOI
高影响因子
Small Methods
·
2021
·Vol. 5
·期 11
·2100787
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IF 14.188
Rui Huang,Hongye Wang,Cheng Tao,Minghe Cao,Hua Hao,Zhonghua Yao,Hanxing Liu
Dielectric film capacitors are considered as potential candidates for advanced power electronics technology due to their extremely high-power densities and outstanding mechanical and thermal stability, but the further improvement of energy storage density is still needed. Here, a strategy is proposed to enhance the energy storage properties by introducing nanoscale polarization regions into amorphous films, which can significantly improve the maximum polarization and maintain a high breakdown strength. The (1− x )BaTiO 3 - x Bi(Ni 0.5 Zr 0.5 )O 3 ((1− x )BT- x BNZ) thin films are fabricated by the sol–gel method and the amorphous films with nanoscale polarization regions are obtained by adjusting the preparation process. Consistent with the conjecture, amorphous phase and nanoscale polarization regions in the (1− x )BT- x BNZ films are clearly observed by electron diffraction. Results show that giant recoverable energy density of 103.7 J cm −3 with high energy efficiency of 88.3% are simultaneously achieved at 8.3 MV cm −1 in 0.92BT-0.08BNZ thin films. Furthermore, the 0.92BT-0.08BNZ thin film exhibits excellent thermal stability in a wide temperature range of 20–200 °C, ∆ W rec / W rec20 °C < 2.2%. This work provides a novel method for dielectric thin film capacitors applied in high temperature and electric field.
研究领域:
材料科学
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电子工程
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DOI
PubMed
高影响因子
Journal of Advanced Dielectrics
·
2019
·
IF 0
Bing Xie,Ling Zhang,Mohsin Ali Marwat,Yiwei Zhu,Weigang Ma,Pengyuan Fan,Haibo Zhang
The development of advanced dielectric film materials with high energy storage performance is of critical significance for pulsed power capacitor applications. Nevertheless, the low discharged energy density ( U e ) of current dielectric film material restricts their further application. In this work, core-shell structured SrTiO 3 @SiO 2 nanowires (ST@SiO 2 NWs) fillers are fabricated based on interface engineering for high U e . The optimized SiO 2 insulating layer could effectively confine the mobility of space charge carriers in the interfacial zone between ST NWs and thick SiO 2 insulating layer, thus reducing the interfacial polarization between the interface of nanofillers/polymer, which could be used to optimize the electric field strength and electric displacement of the corresponding nanocomposite. As a result, this nanocomposite film simultaneously exhibits enhanced maximum applied electric field ( E max ) and ( D max - P r ) values, thus releasing an ultrahigh discharged energy density of 14.7 J/cm 3 at 390 MV/m, which is 99% higher than that of the conventional ST/P(VDF-CTFE) (without SiO 2 coating) nanocomposite, and it is almost 2.5 times that of pure P(VDF-CTFE). This work demonstrates the superiority of the core-shell structured paraelectric nanowire in enhancing the energy storage performance of dielectric film capacitors, which is expected to guide the design of advanced energy-storage nanocomposites.
研究领域:
材料科学
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能源存储
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DOI
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Yanan Yin,Chenggang Zhang,Jisi Chen,Wenchao Yu,Zhuqun Shi,Chuanxi Xiong,Quanling Yang
Flexible electrostatic capacitors have many potential applications in modern electric power systems. In this study, flexible cellulose-based dielectric films were prepared by compositing regenerated cellulose (RC) and one-dimensional BaTiO 3 nanofiber (BTNF) via a simple and environmentally friendly process. To improve compatibility and distributional homogeneity of the fillers/matrix, BTNF was surface modified by dopamine to prepare the poly(dopamine) modified BTNF (PDA@BTNF). The obtained RC/PDA@BTNF composite films (RC-PDA@BTNF) possessed higher dielectric constant and breakdown strength than those of the RC and RC/BTNF composite films. In particular, RC/PDA@BTNF composite films with 2 vol% PDA@BTNF (RC-2PDA@BTNF) exhibited a high discharged energy density of 17.1 J/cm 3 at 520 MV/m, which exceeded 40 % compared with that of RC-2BTNF at 460 MV/m. Meanwhile, RC-2PDA@BTNF could continuously work for more than 10,000 times with a high efficiency of 91 %. Furthermore, the composite films could maintain good dielectric properties for a long time when stored in vacuum condition (under 0.3 atm). Therefore, these flexible cellulose-based dielectric materials are promising in the field of novel high-performance film dielectric capacitors.
研究领域:
材料科学
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电气工程
·
纳米技术
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DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2017
·
IF 1.815
Yuying Zang,Haiyang Shi,Yingzhou Huang,Xiping Zeng,Liang Pan,Shuxia Wang,Weijia Wen
The polarization dependence plays a great impact on the SERS intensities for the surface plasmon coupling between nanoparticle aggregating. In this work, the SERS intensities collected from nanorice heterogeneous dimer or homogeneous dimer on Au, ITO and glass substrates exhibit strong polarization dependence. This result is further analyzed by the simulated surface charge distribution and electromagnetic enhancement distribution. Our data illustrate that SERS polarization dependence exhibits in all gaps in whole system, not only the gaps between nanorices but also gaps between nanorices and film, which could be important for the application of SERS as an ultrasensitive sensing technique.
研究领域:
纳米技术
·
光学
·
材料科学
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DOI
高影响因子
NATURE MATERIALS
·
2022
·Vol. 21
·期 9
·1074-1080
·
IF 47.656
Yang Bingbing,Zhang Yang,Pan Hao,Si Wenlong,Zhang Qinghua,Shen Zhonghui,Yu Yong,Lan Shun,Meng Fanqi,Liu Yiqian,Huang Houbing,He Jiaqing,Gu Lin,Zhang Shujun,Chen Long-Qing,Zhu Jing,Nan Ce-Wen,Lin Yuan-Hua
Electrostatic dielectric capacitors are essential components in advanced electronic and electrical power systems due to their ultrafast charging/discharging speed and high power density. A major challenge, however, is how to improve their energy densities to effectuate the next-generation applications that demand miniaturization and integration. Here, we report a high-entropy stabilized Bi 2 Ti 2 O 7 -based dielectric film that exhibits an energy density as high as 182 J cm −3 with an efficiency of 78% at an electric field of 6.35 MV cm −1 . Our results reveal that regulating the atomic configurational entropy introduces favourable and stable microstructural features, including lattice distorted nano-crystalline grains and a disordered amorphous-like phase, which enhances the breakdown strength and reduces the polarization switching hysteresis, thus synergistically contributing to the energy storage performance. This high-entropy approach is expected to be widely applicable for the development of high-performance dielectrics.
研究领域:
材料科学
·
电气工程
·
储能技术
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）