ACS Applied Energy Materials
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2022
·
IF 6.959
Qinzhao Sun,Bofeng Shi,Tianran Zhang,Weijie Yang,Jiping Wang,Lixue Zhang,Dezhen Xue,Zepeng Wang,Fang Kang,Xiaoxiao Zhang
Dielectric capacitors with a high energy-storage density and efficiency are urgently required for miniaturization and integration of power electronics and pulsed power system. Herein, single-layered stretched P(VDF-HFP) with a certain content of poly(methyl methacrylate) (PMMA) and two kinds of sandwich-structured films are prepared to optimize and compare energy-storage performance. The results revealed that the crystallization transition behavior of stretched P(VDF-HFP) films contributed to enhance its electric polarization, while the introduction of linear type PMMA resulted in an enhancement of voltage tolerance of stretched films by improving the mechanical properties and suppressing leakage current. What’s more, the effects of crystalline orientations and structure design on the breakdown mechanism of stretched films were revealed by finite element theoretical simulation. As a consequence, the stretched sandwich-structured 0-25-0-S (pure P(VDF-HFP) serves as the outer layer, and blends represent the middle layer; the digit representing PMMA content in the P(VDF-HFP)) displayed a high Ue of 28.71 J/cm3 and η of 74% under 680 MV/m. This work provides a workable and effective method for developing capacitive films with great energy-storage performance.
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
Journal of Inorganic and Organometallic Polymers and Materials
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2025
·
IF 4.9
Zhang Siqi,Wu Shu,Li Jinglei,Wang Qi,Yang Bowen,Guan Mengxiang,Peng Guirong,Zhao Xiaojia
The ferroelectric polymer PVDF and its copolymer have garnered significant attention in the field of dielectric energy storage due to their high permittivity and high breakdown strength. However, their high dielectric loss limits their application in the field of energy storage. Thus, reducing the dielectric loss of films while maintaining a high permittivity presents a challenge. In this paper, NiBDC and CuBDC were synthesized via solvothermal method and added into P(VDF-HFP) films, respectively. The effect of MOFs on the structure and dielectric properties of P(VDF-HFP) films were investigated. The results showed that the addition of MOFs could significantly increase the crystallization temperature while decreasing crystallinity and crystal size of the films. Tanδ decreased from 0.059 to 0.042 (10 k Hz, 18 °C) for the film with 10% CuBDC addition as coordinatively unsaturated metal centers in MOFs acted as electron traps that reduced tanδ and conductivity of the films. In addition, for the film with 1% CuBDC, the breakdown strength increased from 341.5 MV/m to 369.5 MV/m, the efficiency of the films increased from 87.7 to 93.9%.
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
Materials
·
2024
·Vol. 17
·期 13
·3046
·
IF 3.1
Xiang Ke,Lifang Deng,Yanping Wang,Kai Tang,Lei Xiao,Gazi Hao,Peili Li,Xiang Zhou
Strengthening the interfacial contact between the reactive components effectively boosts the energy release of energetic materials. In this study, we aimed to create a close-knit interfacial contact condition between aluminum nanoparticles (Al NPs) and Polyvinylidene fluoride-hexafluoropropylene (P(VDF-HFP)) through hydrolytic adsorption and assembling 1H, 1H, 2H, 2H-Perfluorododecyltrichlorosilane (FTCS) on the surface of Al NPs. Leveraging hydrogen bonding between –CF and –CH and the interaction between C–F⋯F–C groups, the adsorbed FTCS directly leads to the growth of the P(VDF-HFP) coating layer around the treated Al NPs, yielding Al@FTCS/P(VDF-HFP) energetic composites. In comparison with the ultrasonically processed Al/P(VDF-HFP) mixture, thermal analysis reveals that Al@FTCS/P(VDF-HFP) exhibits a 57 °C lower reaction onset temperature and a 1646 J/g increase in heat release. Associated combustion tests demonstrate a 52% shorter ignition delay, 62% shorter combustion time, and a 288% faster pressurization rate. These improvements in energetic characteristics stem from the reactivity activation of FTCS towards Al NPs by the etching effect to the surface Al2O3. Moreover, enhanced interfacial contact facilitated by the FTCS-directed growth of P(VDF-HFP) around Al NPs further accelerates the whole reaction process.
研究领域:
材料科学
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化学工程
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DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 7
·3949-3957
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IF 3.108
Enjie Yu,Qilong Zhang,Nuoxin Xu,Hui Yang
In this study, self-assembly flower-like TiO2 (F-TiO2) particles with an average diameter of 400 nm are synthesized via a facile one-pot solvothermal method. P(VDF-HFP)-based composites with F-TiO2 particles of different volume ratio as fillers are prepared. Microstructure and thermal analyses confirm that F-TiO2 does not change the crystallization process of the polymer matrix, but disrupts the crystallization degree of P(VDF-HFP). Dielectric properties measured at various frequencies and temperatures indicate that the addition of the F-TiO2 fillers enhances the dielectric constant of the composites, while the dielectric loss and electric conductivity do not significantly increase. The dielectric permittivity of the polymer nanocomposites is enhanced by 200% over that of the P(VDF-HFP) matrix at a filler content of 20 vol% while maintaining a rather low dielectric loss (0.043 at 1 kHz). Especially, the F-TiO2/P(VDF-HFP) composites exhibit low electric conductivity (≤10−11 S cm−1) at low frequencies. All the improved performances suggest an easy method to fabricate nanocomposites having potential electrical applications.
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
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
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2021
·Vol. 109
·期 12
·2227-2236
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IF 3.368
Shuxian Shen,Xuzhao He,Xiaoyi Chen,Lingqing Dong,Kui Cheng,Wenjian Weng
Electrical stimulation has been proved to be critical to regulate cell behavior. But, cell behavior is also susceptible to multiple parameters of the adverse interferences such as surface current, electrochemical reaction products, and non-uniform compositions, which often occur during direct electric stimulation. To effectively prevent the adverse interferences, a novel piezoelectric poly(vinylidene fluoride-trfluoroethylene)(P(VDF-TrFE)) layer was designed to coat onto the indium tin oxide (ITO) planar microelectrode. We found the electrical stimulation was able to regulate the osteogenic differentiation of mesenchymal stem cells (MSCs) through calcium-mediated PKC signaling pathway. Meanwhile, the surface charge of the designed P(VDF-TrFE) coating layer could be easily controlled by the pre-polarization process, which was demonstrated to trigger integrin-mediated FAK signaling pathway, finally up-regulating the osteogenic differentiation of MSCs. Strikingly, the crosstalk in the downstream of the two signaling cascades further strengthened the ERK pathway activation for osteogenic differentiation of MSCs. This P(VDF-TrFE) layer coated electrical stimulation microelectrodes therefore provide a distinct strategy to manipulate multiple-elements of biomaterial surface to regulate stem cell fate commitment.
研究领域:
生物医学工程
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细胞生物学
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材料科学
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DOI
PubMed
高影响因子
POLYMER
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2024
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IF 4.1
Siqi Zhang,Shu Wu,Qi Wang,Mengxiang Guan,Bowen Yang,Guirong Peng,Xiaojia Zhao
P(VDF-HFP) is widely used in transistors, electret and artificial skin due to its excellent dielectric properties . In order to dramatically improve its dielectric constant, conductive fillers are used for doping, but the compatibility is not optimistic between the fillers and the PVDF . In this paper, PEDOT:PSS/P(VDF-HFP) all-organic films with interpenetrating network structure were prepared by the addition of H 2 O. The dielectric constant of the film with 0.5 wt % PEDOT:PSS reached up to 323 and the tanδ was only 0.48 (1 k Hz, 18 °C). The addition of the H 2 O made the small amount of PEDOT:PSS evenly distribute in the P(VDF-HFP), as a result, the percolation threshold decreased. Besides, molecular chains of PEDOT:PSS were overlapped to form a uniform network. This paper provided a novel preparation method for a uniform film with two kinds of matters with different compatibility.
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
MATERIALS RESEARCH BULLETIN
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2025
·
IF 5.7
Jizhong Deng,Guoxiang Zhang,Ya Yang,Wenjun Zhu,Zhiyi Wu,Yuanyu Wang
The development of wearable technology has been driven by the increasing demand for flexible and sensitive sensors that can utilize body motion to generate electricity or acquire physiological data for health assessment and rehabilitation. In this work, piezoelectric materials K 0.5 Na 0.5 NbO 3 nanoparticles (KNN NPs), synthesized through a one-step hydrothermal method, were integrated into poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] films to enhance their electrical properties for application in wearable piezoelectric nanogenerator (PENG) sensors. The maximum content of β phase in the composite film is as high as 83.1%, which may be attributed to the enhancement of polar interface interactions. The PENG sensors exhibited an open-circuit voltage of 12 V, a short-circuit current of 0.86 μA, and a peak power of 3.18 μW under optimal load, showcasing superior performance and stability over 4700 cycles. Monitoring results from human body motion demonstrated the potential application prospects of PENG sensors in motion analysis and medical rehabilitation.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Yu Feng,Yu Zhang,Jie Sheng,Tiandong Zhang,Qingguo Chi,Qingguo Chen,Weidong Fei
Multiferroic materials have good application prospect in the field of non-volatile random access memory due to the simultaneous existence of ferroelectricity, ferromagnetism, and the coupling between them. In this work, two kinds of nanofibers (pure CoFe2O4 nanofibers and CoFe2O4 nanofibers coated with a BaTiO3 layer) were designed and fabricated. P(VDF-TrFE)-based composites with aligned nanofibers were prepared via high-speed directional electrospinning. The effect of ferromagnetic nanofibers on the ferroelectricity of composites was investigated, and the multiferroic performance and magnetic anisotropy were observed. The leakage current of the composite can be well suppressed after coating the BaTiO3 layer, and it makes the composite possess enhanced ferroelectric and ferromagnetic properties at the same time. Notably, the maximum polarization and remnant polarization of a 10 vol % P(VDF-TrFE)/CoFe2O4@BaTiO3 composite reach 8.0 and 7.0 μC/cm2, respectively, when the applied electric field is 1000 kV/cm. Meanwhile, the maximum magnetization and remnant magnetization are 5.9 and 2.0 emu/g at 20,000 Oe, respectively, and the magnetization along the nanofiber direction is larger than that perpendicular to the nanofiber direction on the surface of the composites. The maximum values of the magnetoelectric voltage coefficient reached 5111 mV/cm·Oe (Hdc = 8083 Oe) for the 5 vol % P(VDF-TrFE)/CoFe2O4@BaTiO3 composite. The excellent ferroelectric and ferromagnetic properties in a high electric field make flexible composites promising to be an ideal material for improving the multiferroic devices.
研究领域:
材料科学
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物理学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiandie Zhang,Zhijie Fan,Heng Xu,Haozhe Li,Chongqing Deng,Xueqin Yang,Xiang Zhou,Xiaode Guo
In this work, NH 4 CuF 3 is utilized as the metal fluorine source and P(VDF-HFP) as the organic fluorine source to fabricate the Al-NH 4 CuF 3 @P(VDF-HFP) ternary energetic thin film via electrospinning technology. The continuous encapsulation of the components Al and NH 4 CuF 3 by P(VDF-HFP) endows the Al-NH 4 CuF 3 @P(VDF-HFP) composite with excellent hydrophobic properties and acid-alkali corrosion resistance, providing Al and NH 4 CuF 3 with anti-aging performance and stability in extreme environments. Additionally, the reaction performance of the Al-NH 4 CuF 3 @P(VDF-HFP) ternary reaction system is analyzed. The results indicate that the Al-NH 4 CuF 3 @P(VDF-HFP) ternary reaction system combines the performance advantages of both the Al-NH 4 CuF 3 and Al-P(VDF-HFP) binary reaction systems, namely low-temperature reaction and a high reaction rate. It is confirmed that the application of the double-F strategy can obtain an Al-NH 4 CuF 3 @P(VDF-HFP) combustion system with a high reaction rate, high ignition sensitivity, and high combustion efficiency. The combustion mechanism of composites is revealed by the analysis of gaseous and condensed products and performance analysis of reaction process. The aim of this study is to integrate the advantages of metal fluorine and organic fluorine to enhance the reaction properties of Al-based energetic composites.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2018
·
IF 5.16
Hang Luo,Zhong Wu,Xuefan Zhou,Zhongna Yan,Kechao Zhou,Dou Zhang
Carbon nano-materials e.g. graphene are widely utilized to prepare high-к dielectrics due to their low percolation threshold. However, composites incorporated with conductive carbon nano-materials usually suffer from high dielectric loss. In this work, a strategy is proposed to suppress the dielectric loss of graphene/P(VDF-HFP) composites using two-dimensional BaTiO 3 platelets. Large interfacial region is formed in the composites due to the hybrid fillers , which results with enhanced interfacial polarization . The BaTiO 3 platelets are aligned in the perpendicular direction to the surface of the composite film after the treatment of tape casting . These aligned BaTiO 3 platelets act as isolation belts to block the electron transportation path. In these contributions, composite with a high permittivity of 66.2 and suppressed dielectric loss of 0.048 are simultaneously obtained. This work provide a feasible route to prepare high performance dielectric composites.
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
Defence Technology
·
2025
·
IF 5.9
Xiandie Zhang,Zhijie Fan,Heng Xu,Jinbin Zou,Chongqing Deng,Xiang Zhou,Xiaode Guo
Al/NH 4 CoF 3 - Φ ( Φ = 0.5, 1.0, 1.5, 2.0 and 3.0) binary composites and Al-NH 4 CoF 3 @P(VDF-HFP) ternary composites are fabricated via ultrasonication-assisted blending and electrostatic spraying. The effect of equivalence ratio ( Φ ) on the reaction properties is systematically investigated in the binary Al/NH 4 CoF 3 system. For ternary systems, electrostatic spraying allows both components to be efficiently encapsulated by P(VDF-HFP) and to achieve structural stabilization and enhanced reactivity through synergistic interfacial interactions. Morphological analysis using SEM/TEM revealed that P(VDF-HFP) formed a protective layer on Al and NH 4 CoF 3 particles, improving dispersion, hydrophobicity (water contact angle increased by 80.5% compared to physically mixed composites) and corrosion resistance. Thermal decomposition of NH 4 CoF 3 occurred at 265 °C, releasing NH 3 and HF, which triggered exothermic reactions with Al. The ternary composites exhibited a narrowed main reaction temperature range and concentrated heat release, attributed to improved interfacial contact and polymer decomposition. Combustion tests demonstrated that Al-NH 4 CoF 3 @P(VDF-HFP) achieved self-sustaining combustion. In addition, a simple validation was done by replacing the Al component in the aluminium-containing propellant, demonstrating its potential application in the propellant field. This work establishes a novel strategy for designing stable, high-energy composites with potential applications in advanced propulsion systems.
研究领域:
材料科学
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化学工程
·
能源技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 24
·22028-22038
·
IF 2.22
Peng Qirui,Yang Lu,Zhao Qiuying,Ma Yizhou,Ji Hongli,Qiu Jinhao
The development of piezoelectric polymers with superior electromechanical performance is a demand in the areas of flexible sensors, actuators and tissue engineering, among others. In this work, we reported a novel sandwich-structured piezoelectric composites comprising of poly(vinylidene fluoride-hexafluoropropylene) [P(VDF-HFP)] and Prussian blue analogs Co 3 [Co(CN) 6 ] 2 with excellent electromechanical activities. The large specific surface area, unique three-dimensional porous nanostructure and redox behavior of Co 3 [Co(CN) 6 ] 2 appeared to significantly promote the interfacial coupling effect within P(VDF-HFP), resulting in enhanced electromechanical response. Moreover, the sandwich structure topological design would enlarge the interfacial coupling effect, strengthen the breakdown strength and consequently raise the electromechanical performance. For instance, a maximum piezoelectric coefficient d 33 of ~ 41 pC/N can be achieved in the sandwiched composites at a loading of 0.8 wt%, which is 1.78 times that of pure P(VDF-HFP). Furthermore, the sandwiched composites possess superior electromechanical coupling factor k 33 up to 0.215, while that of pure P(VDF-HFP) is only 0.134.
研究领域:
材料科学
·
柔性电子
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）