Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 22
·13473-13482
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IF 10.733
Kailun Zou,Yu Dan,Yuxi Yu,Ying Zhang,Qingfeng Zhang,Yinmei Lu,Haitao Huang,Xin Zhang,Yunbin He
Dielectric nanocomposites composed of a polymer matrix with high electric breakdown strength and inorganic ferroelectric nanofillers with large maximum electric displacement (Dmax) have recently attracted much attention due to their high power density, superior flexibility, and good fatigue endurance. However, their discharge energy density and energy efficiency are limited because of the high remnant displacement (Dr) and small Dmax − Dr values of the ferroelectric fillers. Compared with ferroelectrics, antiferroelectrics exhibit much lower Dr (near zero) and far larger Dmax − Dr values, and thus if they are used as the fillers of the dielectric composite, a larger discharge energy density and higher energy efficiency may be obtained simultaneously. Based on this, in this work, Pb0.97La0.02(Zr0.50Sn0.45Ti0.05)O3 (PLZST) antiferroelectric nanoparticles (∼200 nm in diameter) coated with a dense and robust dopamine layer are prepared in order to develop dopamine-modified PLZST filler/poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) polymer nanocomposites with superior energy storage properties. The experimental results indicate that optimizing the filler content leads to a small Dr (0.61 μC cm−2), large Dmax − Dr value (6.14 μC cm−2), and high electric breakdown strength (3136 kV cm−1), as a result of which, the PLZST/P(VDF-HFP) nanocomposites filled with 5 wt% dopamine-modified PLZST nanoparticles simultaneously exhibit a large discharge energy density of 9.39 J cm−3 and high energy efficiency of 82%. These energy storage properties are superior to those of most ferroelectric filler (including nanowires and nanofibers prepared by complicated methods)/polymer nanocomposites with a single-layer structure. Our work not only proves that, antiferroelectric nanoparticles are excellent fillers that can be comparable to, or even better than, ferroelectric nanowires and nanofibers prepared by very complicated methods, for energy-storage inorganic/polymer dielectric composites, but also provides a convenient and effective way to prepare and design flexible dielectric capacitors with superior energy storage capacity.
研究领域:
材料科学
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纳米技术
·
电气工程
·
复合材料
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DOI
高影响因子
Processes
·
2025
·Vol. 13
·期 10
·3295
·
IF 2.8
Yinzhang Cheng,Xueting Bai,Zhenyu Lu,Ruijue Wang,Wei Wang,Ruizhou Guo,Yudong Xu,Zhipeng Lei
With the rapid development of communication, electronics, medical, and energy industries in modern society, film capacitors have garnered widespread attention and undergone significant growth. However, the low energy density (Ue) resulting from low breakdown strength (Eb) significantly limits the application of thin-film capacitors. In this work, we use a low-cost and effective dip-coating method to apply boron nitride (BN) layers onto the outer layers of poly(vinylidene fluoride-co-hexafluoropropylene)/barium titanate (P(VDF-HFP)/BT) composite films to prepare boron nitride-poly(vinylidene fluoride-co-hexafluoropropylene/barium titanate-boron nitride (BN-P(VDF-HFP)/BT-BN) composite films with a sandwich structure that exhibits extremely highEbandUe. The experimental results show that the sandwich-structured BN-P(VDF-HFP)/BT-BN films containing 7.5 wt% BT nanoparticles obtained 530 MV/mEband 18.12 J/cm3Ue, both of which are much higher than those of the corresponding monolayer films. In addition, the finite element simulation results show that the designed sandwich-structured films can reduce local field strength distortion, decrease leakage current, and suppress the development of breakdown channels, thereby significantly improvingEbandUe. In summary, this study presents a low-cost and effective method for enhancing the breakdown strength and energy density of thin-film capacitors.
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Juan Shi,Yifu Yang,Huixia Shao
A novel gel polymer electrolyte (GPE) is prepared based on the co-polymerization of vinylidene fluoride (VDF) and hexafluoropropylene (HFP), the blending of the copolymer P(VDF-HFP) with poly(ethyleneoxide) and Poly(methylmethacrylate), and the absorption of liquid electrolyte of lithium hexafluorophosphate (LiPF 6 ) in ethylene carbonate (EC) + dimethyl carbonate (DMC) (1:1 v/v) as the plasticizer . This GPE has more amorphous region, and can accommodate larger amount of liquid electrolyte via its porous structure without leakage, which provide an ionic conductivity of 0.81 mS cm −1 at 25 °C. Furthermore, the GPE possesses a high electrochemical window of 5.0 V (vs. Li/Li + ), superior thermal stability, large Li + transport number and excellent interface stability to Li metal anode . The test cells with the GPE, Li metal anode and LiCoO 2 cathode show a superior cycling stability and rate performance. This GPE is promising to be applied to rechargeable Li batteries with high safety and long cycle life.
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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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DOI
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
·
能源存储
·
高分子化学
✓ 已验证
DOI
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
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电池技术
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固态电解质
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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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产品关联
DOI
高影响因子
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
·
能量存储
·
聚合物复合材料
·
电介质材料
✓ 已验证
产品关联
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
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 30
·10257-10265
·
IF 7.059
Liang Sun,Zhicheng Shi,Liang Liang,Shuang Wei,Huanlei Wang,Davoud Dastan,Kai Sun,Runhua Fan
Polymer dielectric composites are of considerable interest for film capacitors that are widely used in modern electric devices and electric power systems. However, the adverse coupling between dielectric permittivity (εr) and breakdown strength (Eb) makes it difficult to obtain high energy densities in natural materials. With the aim of achieving concurrently improved εr and Eb, a class of rationally designed layer-structured composites consisting of pure poly(vinylidene fluoride–hexafluoropropylene) (P(VDF–HFP)) layers and barium titanate/P(VDF–HFP) (BT/P(VDF–HFP)) composite layers were prepared. Interestingly, the layer-structured composites exhibit a concurrent improvement of εr and Eb. The 4-layer composite with 15 vol% BT exhibits substantially enhanced εr and Eb which are nearly ∼186% and ∼248% of those for its 1-layer counterpart, respectively. Consequently, a high energy density of ∼4 J cm−3 along with a satisfactory efficiency of 71% at 240 kV mm−1 is achieved. Meanwhile, a low loss tangent of ∼0.05 at 10 kHz which is comparable to that of pure P(VDF–HFP) is maintained. This work shows that the adverse coupling between εr and Eb in dielectric materials could be well addressed by constructing nanocomposites with layered rather than random distribution of fillers.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Changning Ran,Yizhou Liang,Boyu Li,Yuhan Xing,Xi Chen,Chuanyezi Cai,Jiacheng Guo,Gengqi Tong,Jichen Sun,Youyuan Zheng,Huimin Liao,Jianjun Zhang
Poly(vinylidene fluoride) (PVDF)-based ferroelectrics are essential for film capacitors, yet their high dielectric loss and low charge/discharge efficiency caused by ferroelectric hysteresis severely limit practical applications. Linear polypropylene (PP), in contrast, dominates the commercial capacitor market due to its high efficiency and low loss, prompting extensive efforts to combine the advantages of both polymers. However, existing approaches often rely on costly molecular design or complex film-forming processes, conflicting with the demands for low-cost and miniaturized electronic devices. Here, we report a solution-based and scalable strategy that avoids high-temperature melt processing to fabricate a hybrid dielectric film comprising a P(VDF-HFP) matrix, embedded PP chain segments, and core–shell structured BT@SiO2 nanoparticles. Polypropylene chain segments are embedded into the poly(vinylidene fluoride-co-hexafluoropropylene) [P(VDF-HFP)] matrix via solution blending, forming molecularly interpenetrating interfaces that effectively suppress ferroelectric hysteresis. Core–shell structured BT@SiO2 nanoparticles are simultaneously incorporated to further enhance dielectric properties. The resulting P(VDF-HFP)-PP/BT@SiO2 nanocomposite films exhibit a high dielectric constant of 46, a charge/discharge efficiency consistently exceeding 80%, and a maximum energy density of 3.92 J/cm3. Phase-field simulations further reveal that the P(VDF-HFP)-PP/BT@SiO2 architecture with graded dielectric constants mitigates local electric field concentration, accounting for the excellent breakdown performance. Unlike conventional high-temperature melt processing or complex molecular design, this work offers a low-cost and scalable route that avoids high-temperature melt processing to high-performance polymer dielectrics, demonstrating that combining molecular interpenetration with core–shell filler engineering provides a promising pathway for next-generation capacitors.
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DOI
PubMed
高影响因子
ACS Omega
·
2026
·
IF 5.2
Xuan Liu,Liangliang Chang,Aiguo He,Zengzhe Xi,Chunsheng Zhou,Baoyue Cao
The persistence of fluoroquinolone antibiotics like OFL in aquatic environments poses a significant ecological and public health risk due to their poor biodegradability and potential to induce antibiotic resistance. This study reports the fabrication of free-standing, flexible nanofibrous films via electrospinning, incorporating optimal BGFZ9 nanoparticles into a P(VDF-HFP) matrix (denoted as P(VDF-HFP)@BGFZ9). Comprehensive characterization reveals that the BGFZ9 nanoparticles act as effective heterogeneous nucleating agents, significantly promoting the formation of piezoelectric β-phase in P(VDF-HFP) and enhancing the ferroelectric polarization of the composite through interfacial coupling. Under ultrasonic excitation, the composite film exhibits remarkable piezocatalytic performance for OFL degradation, following pseudo-first-order kinetics. The film with an optimal 10% BGFZ9 loading achieves a reaction rate constant of 0.684 min–1·g–1 under piezocatalysis, which is approximately 1.22 times higher than that of the pure polymer film. A synergistic piezophotocatalytic effect is observed under combined ultrasonic and light irradiation, leading to an OFL removal efficiency of 85.71% within 3 h and a further increased rate constant of 1.043 min–1·g–1. Radical scavenger experiments and EPR spectroscopy identify superoxide radicals •O2– and h+ as the primary reactive species responsible for the degradation. The composite film demonstrates excellent cycling stability, retaining 94.4% of its initial activity after five consecutive runs, alongside robust structural integrity. This work provides a novel strategy for developing efficient, stable, and easily recyclable flexible piezocatalytic materials for antibiotic wastewater remediation.
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DOI
PubMed
高影响因子
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