ACS Applied Electronic Materials
·
2026
·
IF 4.7
Quanbin Ma,Zhihua Zheng,Rui Li,Shi Feng,Juqi Wang,Haoyang Chen,Hongjun Qian,Fangping Ouyang,Xiaolong Yao,Shishang Guo
Flexible piezoelectric sensors with high output and long-term stability are critically limited by low polar phase content and inefficient interfacial electromechanical coupling in polymer-based systems. Here, we report a high-performance flexible piezoelectric sensor based on a PDA-engineered PDA@KNN/P(VDF-TrFE) electrospun composite, achieving simultaneous enhancement of β-phase crystallinity, interfacial stress transfer, and piezoelectric output. Owing to the bioinspired PDA interfacial layer and electrospinning-induced chain alignment, the optimized composite exhibits an ultrahigh β-phase fraction of 85.5%, significantly higher than pristine P(VDF-TrFE) (∼51%). The piezoelectric sensor delivers a high output voltage of 30 V, an ultrasensitive pressure response of 0.48 V·kPa–1, and excellent durability with <3% signal degradation over 3000 loading cycles, outperforming most reported PVDF-based piezoelectric sensors. First-principles density functional theory (DFT) calculations reveal that PDA-mediated interfacial coupling significantly lowers the interfacial formation energy (−3.27 eV), induces directional charge transfer, and reduces the work function, thereby enhancing interfacial polarization and electromechanical response. Furthermore, the sensor is successfully integrated into a self-powered smart wrist pressure monitoring system, enabling real-time detection of mechanical stimuli during fitness training. This work demonstrates a performance-driven interfacial engineering strategy for high-output, durable, and lead-free flexible piezoelectric sensors, with strong potential for wearable electronics and self-powered sensing applications.
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DOI
高影响因子
IONICS
·
2018
·Vol. 24
·期 12
·3975-3982
·
IF 2.347
Wang Lu,Luo Hang,Zhou Xuefan,Wei Anqi,Zhou Kechao,Chen Zhuo,Zhang Dou
As the electronic industry developed rapidly, greater demands are required on the performance of dielectric composites, such as high permittivity, low dielectric loss, and high-energy density. Improving the compatibility of fillers in polymer matrix and uniform distribution of the electric field could increase the permittivity of such composites. Therefore, BaTiO 3 nanoparticles were coated by TiO 2 sol to fabricate BaTiO 3 @TiO 2 core-shell structured fillers in this paper. BaTiO 3 @TiO 2 fillers with gradient permittivity were firstly modified by dopamine in order to disperse in the composites homogeneously and adhere to poly(vinylidene fluoride- co -hexafluoropropylene) (P(VDF-HFP)) matrix tightly. At 1 kHz, the permittivity of the composite with 20 vol% BaTiO 3 @TiO 2 was 32.15, obviously larger than that of pure P(VDF-HFP) (6.92), and the dielectric loss was just 0.052. Consequently, the discharged energy density of the composite was enhanced to 0.23 J/cm 3 at 40 kV/mm, which was two times higher than that of pure P(VDF-HFP). This work provides a feasible approach to prepare high-performance dielectric composites.
研究领域:
材料科学
·
电子工程
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高影响因子
ACS Omega
·
2018
·
IF 0
Shusu Shen,Yi Hao,Yiyuan Zhang,Ganwei Zhang,Xiaoji Zhou,R. B. Bai
In this study, poly(vinylidene fluoride) (PVDF) membrane was modified through a novel approach by first blending an active component (poly(vinylidene fluoride-co-chlorotrifluoroethylene), P(VDF-co-CTFE)) with the PVDF base material, followed by surface grafting of the membrane on the active component to obtain a triblock copolymer functional structure. The prepared membranes were characterized by various analyses, including Fourier-transform infrared, X-ray photoelectron spectroscopy, atomic force microscopy, scanning electron microscope, and filtration tests. It was found that the modified membrane surface showed a much better hydrophilicity (water contact angle of 67.3°) and oleophobicity (oil contact angle of 129.7°). The modification reduced the average surface pore size (from 0.1495 to 0.1072 μm) and thus lowered the pure water flux (from 364.0 to 224.6 L m–2 h–1 at 0.10 MPa of transmembrane pressure), but significantly increased the relative flux recovery (RFR) and the retention efficiency of the modified membrane during the filtration of bovine serum albumin solution and oil/water emulsion. For example, the modified membranes showed 98.6% oil retention (at feed concentration of 0.4 g L–1), 92.7% RFR by simple water flushing after filtration, and a consistently high oil removal of 96% or above during a five-cycle-continuous filtration test, as compared to 30.4% oil retention and 51.8% RFR for unmodified PVDF/P(VDF-co-CTFE) blend membrane.
研究领域:
材料科学
·
膜技术
·
环境工程
·
化学工程
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DOI
Journal of Energy Storage
·
2024
·
IF 8.9
Dengjie Luo,Wei Wang,Wuwei Feng,Shuo Liu,Bin He,Yuqin Liu
To meet the rising demand for energy storage, it is essential to achieve further improvements in the energy storage density and efficiency of composites based on dielectric polymers. Herein, Boron nitride nano sheets (BNNS) with high breakdown strength and high thermal conductivity was introduced into the matrix of polyvinylidene fluoride hexafluoropropylene (P (VDF-HFP)). Via synchronous heating and stirring treatment, BNNS were well dispersed in P(VDF-HFP) with increased fluidity due to the rise of temperature. With the incorporation of 7 wt% BNNS, the composite achieved high energy storage density of 21 J/cm 3 at 492 MV/m and high efficiency of 80.2 % concurrently, outperforms most previous polymer-based composite dielectric energy storage materials. This is attributed to the fact that BNNS can induce the formation of P(VDF-HFP) crystalline phase , and the simultaneous heating process improves filler dispersion to extend the breakdown path and disperse electron heat accumulation.
研究领域:
材料科学
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能量存储
·
聚合物复合材料
·
电介质材料
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Peng Yin,Xiaohan Bie,Qingyang Tang,Linwei Zhu,Runhua Fan,Davoud Dastan,Hongzhi Cui,Kun Zhang,Zhicheng Shi
Polymer dielectrics characterized by high power density, fast discharge rate and reliability are critical in pulse energy storage systems. However, the low discharge energy density (Ud) of polymer dielectrics, stemming from the inverse coupling between dielectric constant (εr) and breakdown strength (Eb), renders them insufficient to meet miniaturized requirements of modern electronics. To address this challenge, we propose constructing dual interfacial gold nanodot interlayers within a barium titanate (BT)/poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) trilayer composite (BT-3L) to synergistically enhance its εr and Eb, ultimately achieving high Ud. Specifically, dual gold nanodot interlayers are anchored at the interface between the P(VDF-HFP) outer layer and the BT/P(VDF-HFP) middle layer via sputtering and hot-pressing processes. Benefiting from the interfacial polarization and Coulomb blockade effect induced by gold nanodots, the concurrently enhanced εr of 12.9 at 10 kHz and Eb of 520.08 MV m−1 are achieved. Consequently, a significantly improved Ud of 14.78 J cm−3, which is approximately 176.4% that of the BT-3L composite (∼8.38 J cm−3), is further realized in this composite with dual gold nanodot interlayers. This work provides a promising approach for designing high-performance multilayer dielectric composites.
研究领域:
材料科学
·
电气工程
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高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 40
·21650-21658
·
IF 14.511
Yu Cheng,Zhongbin Pan,Hanxi Chen,Xiangping Ding,Zhicheng Li,Xu Fan,Jinjun Liu,Peng Li,Jinhong Yu,Jiwei Zhai
High-performance flexible dielectric capacitors have a decisive effect in advanced electronics and electrical power systems. Nevertheless, the discharge energy density (Ud) of dielectric capacitors is bounded by their weak breakdown strength (Eb) and low dielectric constant (K). In this work, mediate dielectric constant one-dimensional hydroxyapatite nanowires (HAP NWs) were synthesized and applied in poly(vinylidene fluoride-co-hexafluoropropene)-based (P(VDF–HFP)) nanocomposites for energy storage application. To mitigate electric field distortion and suppress free charge migration in nanocomposites, Al2O3 was insulated as an interfacial layer incorporated between 1D HAP NWs and polymer matrices, which were identified via phase field simulations and experimental results. Accordingly, P(VDF–HFP)/HAP@Al2O3 NWs composite films exhibit an excellent Ud of ∼27.6 J cm−3 accompanied by a high charging/discharging efficiency (η) of ∼72.9% at 650 MV m−1, which is ∼190% over neat P(VDF–HFP) (∼9.5 J cm−3 at 500 MV m−1) and ∼2200% improvements of bench-mark biaxially oriented polypropylene (∼1.2 J cm−3 at 650 MV m−1). This research offers a paradigmatic design to polymer-based composite films with high Ud and η for application in dielectric capacitors.
研究领域:
材料科学
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能源存储
·
高分子化学
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DOI
高影响因子
Small
·
2024
·
IF 13
Qi Wu,Xingang Liu,Yuanbo Liu,Chuhong Zhang,Min Nie
Polymer-based dielectric film capacitors are essential energy storage components in electronic and power systems due to their ultrahigh power density and ultra-fast charge storage/release capability. Nonetheless, their relatively low energy density does not fully meet the requirements of power electronics and pulsed power systems. Herein, a scalable composite dielectric film based on a ferroelectric polymer with edge hydroxylated boron nitride nanosheets (BNNS-OH) is fabricated via the construction of a hydrogen bonding network and stretching orientation strategy. The presence of hydroxyl groups on boron nitride aids in forming a robust hydrogen bonding network within the ferroelectric polymer, leading to a significant increase in Young's modulus and superior dielectric performance. Furthermore, the stretching process aligns the BNNS-OH and the hydrogen bonding network along the drawing direction via covalent and hydrogen bonding interaction, resulting in a remarkable tensile strength (109 MPa), breakdown strength (688 MV m −1 ), and energy density (28.2 J cm −3 ), outperforming mostrepresentative polymer-based dielectric films. In combining the advantages of a simple preparation process, extraordinary energy storage performance, and low-cost raw materials, this strategy is viable for large-scale production of polymer-based dielectric films with high mechanical and dielectric performance and opens a new path for the development of next-generation energy storage applications.
研究领域:
材料科学
·
能源存储
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DOI
PubMed
高影响因子
TALANTA
·
2026
·
IF 6.7
Zhenji Zhou,Xiaoqing Guan,Hai Jiang,Weimin Xia,Shaoyun Huang
Polyvinylidene fluoride (PVDF) and its copolymer-based piezoelectric composites are widely used in piezoelectric sensors to facilitate efficient energy conversion due to their flexibility and high electromechanical coupling properties. In this study, we introduce a piezoelectric nanogenerator (PENG) that utilizes BaTiO 3 –Nb 2 O 5 @PDA@MWCNTs/P(VDF-TrFE) composite films (BNP-MCP) for detecting environmental mechanical stimuli and enabling wireless monitoring. Notably, adding 5 wt% BaTiO 3 –Nb 2 O 5 @PDA@MWCNTs increases the dielectric constant (εᵣ)of BNP-MCP to 21.8 from the 14.8 of pristine P(VDF-TrFE) at 100 Hz, thereby enhancing the PENG's output performance by improving the charge density. By optimizing the BaTiO 3 –Nb 2 O 5 @PDA content in the P(VDF-TrFE) matrix, the fabricated PENG is characterized by an output voltage of 7.5 V and a maximum power density of 4.52 μW cm −2 . This optimized PENG maintains stable performance after 4500 bending-releasing cycles and exhibits high sensitivity in detecting diverse mechanical stimuli, spanning from subtle perturbations (e.g., leaf fall and insect crawling) to intense impacts (e.g., water flow and human jumping). Additionally, an autonomous all-weather rainfall monitoring system leverages wirelessly received piezoelectric signals to trigger real-time precipitation alerts with three-tier warning thresholds: light rain, moderate rain, and heavy rain. This study establishes a sustainable monitoring framework for agricultural and environmental applications, advancing next-generation self-powered sensing technologies.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenjing Xue,Dong Yan,Guoqiang Han,Wande Ding,Kefeng Zhang,Qianwen Zhang
The inherent hydrophobicity of polyvinylidene fluoride (PVDF) ultrafiltration (UF) membranes exacerbates fouling and limits separation efficiency. To address this, copolymerized poly(vinylidene fluoride- co -acrylic acid) (p(VDF-co-AA)) membranes were fabricated through tert-amyl peroxyneodecanoate (TBPP)-initiated in situ carboxyl group grafting. NMR and XPS verified carboxyl incorporation, while SEM and AFM revealed pore structure refinement (38.44 nm average pore diameter) and increased surface roughness (Ra: increased from 22.7 nm for PVDF membrane to 40.1 nm for p(VDF-co-AA 1.5wt% )). These structural enhancements elevated hydrophilicity, reducing water contact angle by 37.9 % (from 76.65 o ± 2.16 for PVDF membrane. decreased to 47.64 o ± 0.66 for p(VDF-co-AA 1.5wt% )) and tripling pure water permeance to 617 L·m −2 ·h −1 ·bar −1 . Molecular dynamics simulations revealed that synergistic hydrogen bonding and carboxyl polar interactions dominated hydrophilicity enhancement. The modified membranes demonstrated outstanding antifouling performance against humic acid (HA), bovine serum albumin (BSA), and sodium alginate (SA), achieving 28.0–38.8 % higher flux retention (J/J 0 ) and 16.7–50.1 % lower irreversible fouling. Notably, the incorporation of carboxyl groups facilitated stable separation performance under extreme alkaline conditions (pH = 14), retaining over 87.6 % of the initial flux and 69.10 % DOC rejection after a 3-day exposure period. This study provides a robust strategy for the development of high-performance UF membranes through molecular-scale hydrophilicity engineering.
研究领域:
膜科学
·
高分子化学
·
材料科学
·
环境工程
·
化学工程
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 47
·41354-41364
·
IF 9.5
Shaoyan Zhang,Bing Xie,Haishan Xu,Jinqiao Yi,Kun Guo,Haibo Zhang,Tianyu Li
Polymer film capacitors are vital for power electronic systems due to their ultrafast charge–discharge capability, high power density, mechanical flexibility, and lightweight nature. However, achieving both high discharge energy density (Ud) and high energy-storage efficiency (η) in polymer dielectrics remains a major challenge due to the intrinsic trade-off between permittivity, electric polarization, and breakdown strength. In this study, we have designed bilayer heterogeneous nanocomposites (BHNs) that integrate a linear polyimide (PI) layer—offering low dielectric loss and high breakdown strength—with a ferroelectric P(VDF-CTFE) matrix embedded with dopamine-modified BaTiO3 nanowires (dopa@BT NWs), which imparts high polarization. By precisely tuning the thickness of each layer and the interfacial charge accumulation, we activate synergistic interfacial polarization and a breakdown hindrance effect. More importantly, we propose the concept of a “threshold concentration of interfacial space charge”, which governs the critical charge density required to maximize performance without triggering dielectric instability. As a result, the optimized BHNs (0.3 vol% dopa@BT NWs/P(VDF-CTFE)-PI, whose thicknesses are 4 µm and 8 µm, respectively) exhibit a significantly enhanced Ud of up to 11.1–14.1 J cm−3 and a high η of 72–86%, substantially surpassing conventional single-layer configurations. This work not only delivers promising candidates for advanced dielectric energy-storage applications but also introduces a physically grounded design model that offers guidance for next-generation high-performance polymer-based capacitors.
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高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Juan Shi,Hougao Xiong,Yifu Yang,Huixia Shao
Developing solid electrolyte for alkali metal batteries is of important significance. A gel polymer electrolyte (GPE) based on the porous composite polymer membrane formed by blending of PEO , PMMA and P(VDF-HFP) is prepared, and the effects of the addition of nano-sized oxide fillers (Al 2 O 3 , TiO 2 , SiO 2 ) on the characteristics of the composite GPEs are investigated. The composite GPE with filling of SiO 2 has more amorphous region and porous structure which can hold more liquid electrolyte without leakage, so the composite GPE can provide high ionic conductivity at room temperature and large Li + or Na + transport number. Furthermore, the composite GPE possesses a large electrochemical window, superior thermal stability and excellent interfacial stability. The composite GPEs can be applied in a variety of lithium and sodium metal batteries and exhibit superior cycling stability and rate performance.
研究领域:
能源材料
·
电化学
·
高分子科学
·
电池技术
·
固态电解质
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 8
·7725-7732
·
IF 2.195
Ullah S.,Han Z.,Zheng Guangping
The nanocomposites consisting of graphene oxide (GO) and ferroelectric copolymer poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] have been successfully synthesized by a co-evaporation method. The structural, dielectric and ferroelectric properties of the composite papers are investigated. The Raman spectroscopy analyses on the nanocomposites GO/P(VDF-TrFE) reveal that the defects in GOs are reduced significantly by the loading of ferroelectric P(VDF-TrFE). The I G /I D ratio increases from 1.02 (for pure GO) to 1.17 [for GO/P(VDF-TrFE)-10%], revealing that the defects are reduced by the introduction of the nano-fillers due to a strong interaction between GO and P(VDF-TrFE) in the nanocomposites. The permittivity of the nanocomposites is enhanced by almost 3-times as compared to that of the pristine GOs. The nanocomposites show a notably raised polarization with high applied electric field. Furthermore, due to the high dielectric constants, the electrical energy storage density of the nanocomposites is as high as ~ 39.89 J cm −3 at 2.8 MV cm −1 . The large energy density and high dielectric break down strength suggest that GO/P(VDF-TrFE) could be the promising novel materials for electrical energy storage.
研究领域:
材料科学
·
能源存储
·
物理学
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高影响因子
危险品化学品经营许可证（带存储）