POLYMER ENGINEERING AND SCIENCE
·
2022
·Vol. 62
·期 6
·1811-1822
·
IF 2.573
Jian Chen,Chuang Zhou,Wei Cai,Fuxiang Huang,Chunyan Zhang,Liangliang Cao,Fancheng Meng
Ceramic/polymer nanocomposites have been extensively explored for dielectric capacitor application due to their high energy storage performance and ease of processing, flexibility, and low cost. However, improving compatibility between inorganic and organic materials is of great significance and has been a long-standing challenge. In this work, the polymer surfactant Pluronic™ F127 was employed to perform surface modification of BaTiO 3 through a facile solution process. The compatibility between BaTiO 3 nanoparticles and P (VDF-HFP) can be remarkably strengthened by the affinity between F127 polymer chains and the organic matrix. Structural defects such as pores, cracks, and agglomeration of inorganic particles were obviously reduced, and interfacial polarization has been significantly enhanced. The discharged energy density U d and charge–discharge efficiency η reach up to 5.0 J/cm 3 and 58.1% under the breakdown strength of 3740 kV/cm for the nanocomposite containing 1 vol% BT@F127. These dielectric properties are clearly better than the nanocomposite using unmodified BT, as well as similar hybrids reported previously.
研究领域:
材料科学
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电气工程
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纳米技术
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Qiuying Zhao,Lu Yang,Yige Bie,Yuemin Du,Yizhou Ma,Jiatai Sun,Hongli Ji,Jinhao Qiu
The urgent demand of efficient power sources for microelectronics has stimulated the exploration of light-weight electrostatic capacitors with high energy density . With the distinctive characteristics of high dielectric constant and breakdown strength, Poly(vinylidene fluoride) (PVDF) based ferroelectric polymers have emerged as promising candidates for high-performance dielectric capacitors. However, the intrinsic high hysteresis loss of PVDF based polymers would largely weaken the discharge efficiency of capacitors, hindering their practical application. In this work, we demonstrate that through topological-structure design and proper doping composition modulation involving in MXene and boron nitride nanosheets (BNNS), considerable enhanced discharge efficiency and discharge energy density can be simultaneously achieved. For example, a 7 layered composite comprised of alternative BNNS reinforced layers and MXene reinforced layer presents an ultra-high discharge density and charge-discharge efficiency of 34.6 J/cm 3 and 62 %, respectively. It is anticipated that this work will open a new design paradigm to direct PVDF based ferroelectric polymers towards viable high-performance capacitors.
研究领域:
材料科学
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能源存储
·
电子工程
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产品关联
DOI
高影响因子
IONICS
·
2021
·Vol. 28
·期 2
·767-777
·
IF 2.817
Zang Guojing,He Min,Liao Youhao,Li Minsui,Hong Mingyao,Li Weishan
To improve the comprehensive performance of fibrous membrane based on poly(methyl vinyl ether-alt-maleic anhydride) P(MVE-MA)- and poly(vinylidene fluoride-co-hexafluoropropylene) P(VdF-HFP)-blended copolymers, a small amount of nano-Al 2 O 3 was doped by electrospinning technique to apply for high-energy-density cathode material of nickel-rich LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA) based Li-ion battery. The results indicated that the electrospinning membrane and corresponding gel polymer electrolyte (GPE) only doped with 3.0 wt.% nano-Al 2 O 3 presented the proper structure and delivered the best electrochemical characterization. Due to the uniform distribution of nanoparticles on the fibers with higher density, the specific surface area and porosity of the fiber membrane were increased, leading to the improved fracture stress of 172.0 MPa for the membrane and ionic conductivity of 2.1 × 10 −3 S cm −1 for the GPE at room temperature. Contributed from the proper pore structure and the enhanced interfacial stability, the capacity retention of 89.4% was achieved for the Li/GPE/NCA coin cell after 200 cycles in the voltage range of 3.0 V and 4.3 V under room temperature using the GPE doped with 3 wt.% Al 2 O 3 , compared with that of 63.6% for the GPE without nanoparticles. Similarly, the discharge capacity of the coin cell under 7 C rate (123.2 mAh g −1 ) maintained 65% of that at 0.3 C (189.4 mAh g −1 ), showing good rate performance of the developed GPE. Therefore, the significant improvement in electrochemical stability of the GPE achieved by doping a small number of nanoparticles provided a simple and feasible solution for the development of high-energy-density Li-ion batteries.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Tongrui Xian,Jiangtao Zhou,Chen Cao,Qiwei Zheng,Yan Peng,Peilun Yin,Xiaohui Tang,Zhongjie Li
Post-poling-free P(VDF-TrFE)/BTO nanofiber sensors prepared by electrospinning. • A β-phase content of 82.86% was achieved through in-situ electric field orientation and interfacial polarization. • Sensor shows 530.6 mV·kPa −1 sensitivity (0.33–3.33 kPa), 21 ms response time, and excellent durability. • A complete "material–device–circuit–virtual feedback" closed-loop interactive system was constructed. With the rapid advancement of the Internet of Things (IoT) and artificial intelligence (AI), the paradigm of human-machine interaction is shifting toward immersive and multidimensional experiences. In this study, a post-poling-free P(VDF-TrFE)/BTO (PVTB) composite nanofiber sensor with high electroactivity was fabricated by leveraging the synergy between charge trapping and interfacial polarization at the BTO/P(VDF-TrFE) interface, combined with in-situ electric-field orientation during electrospinning. The resulting nanofibers exhibit a mean diameter of 469.8 ± 168.2 nm, and the PVTB membrane achieves a high β-phase content of 82.86%. The PVTB sensor exhibits a sensitivity of 530.6 mV·kPa −1 within the low-pressure range of 0.33–3.33 kPa and 18.2 mV·kPa −1 within the pressure range of 3.33–83.33 kPa, with a minimum detectable force of 0.2 N, a response time of 21 ms, and 88.1% voltage retention after 10000 loading cycles. The PVTB sensor enables effective monitoring of ultra-weak muscle tremor signals, while finger tapping produces an output voltage of approximately 0.4 V. A four-channel “material-device-circuit-virtual feedback” closed-loop interactive system was constructed, demonstrating the potential of flexible piezoelectric sensors in immersive human-machine interaction and providing a precise digital approach for movement disorder rehabilitation. Download: Download high-res image (184KB) Download: Download full-size image
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 14
·5304
·
IF 4.6
Caiyuan Liu,Xin Fang,Hui Peng,Yi Li,Yonggang Yang
The aim of this work is to effectively combine the advantages of polymer and ceramic nanoparticles and improve the comprehensive performance of lithium-ion batteries (LIBs) diaphragm. A flexible film composed of electro-spun P(VDF-HFP) nanofibers covered by a layer of mesoporous silica (P(VDF-HFP)@SiO2) was synthesized via a sol–gel transcription method, then used as a scaffold to absorb organic electrolyte to make gel a electrolyte membrane (P(VDF-HFP)@SiO2-GE) for LIBs. The P(VDF-HFP)@SiO2-GE presents high electrolyte uptake (~1000 wt%), thermal stability (up to ~350 °C), ionic conductivity (~2.6 mS cm−1at room temperature), and excellent compatibility with an active Li metal anode. Meanwhile, F-doping carbon/silica composite nanofibers (F-C@SiO2) were also produced by carbonizing the P(VDF-HFP)@SiO2film under Ar and used to make an electrode. The assembled F-C@SiO2|P(VDF-HFP)@SiO2-GE|Li half-cell showed long-cycle stability and a higher discharge specific capacity (340 mAh g−1) than F-C@SiO2|Celgard 2325|Li half-cell (175 mAh g−1) at a current density of 0.2 A g−1after 300 cycles, indicating a new way for designing and fabricating safer high-performance LIBs.Keywords:composite materials;electro-spun nanofiber;gel electrolyte;carbonaceous anode;lithium-ion batteries
研究领域:
材料科学
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能源技术
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产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Jian Wang,Sen Liang,Jie Xiong,Biyun Peng,Lijun He,Yunchuan Xie,Zhicheng Zhang
Polymer nanocomposites with high-dielectric-constant ceramic fillers have been supposed to a positive candidate for electrostatic capacitors owing to their higher energy density. Herein, the P(VDF-HFP)/BST (poly(vinylidene fluoride-hexafluoropropylene)/Ba 0.6 Sr 0.4 TiO 3 ) nanocomposites films were carefully prepared by layer-by-layer electrospinning, hot-pressing, and quenching processes. In an effort to overcome this challenge that the decrease in breakdown strength due to the high load of ceramic nanoparticles, self-assembly phase-transitioned lysozyme (PTL) is utilized to modify BST ( m BST) to improve interface conditions and layered gradient structure is designed to reduce charge injection at the electrode/films respectively. Studying its microstructure and electrical properties found the gradient structure can simultaneously weaken interface defects and improve energy storage performance. Consequently, a remarkable energy density (13.1 J/cm 3 @450 MV/m) has been obtained compared to that of pure polymer films (5.7 J/cm 3 ). This work presents an attractive approach to enhancing the energy storage properties of polymer nanocomposites by surface modification and structure modulation.
研究领域:
材料科学
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电气工程
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纳米技术
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复合材料
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产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Yan Yang,Chengxiao Sun,Hua Deng,Qiang Fu
Dielectric capacitors with high dielectric constant and energy density are of great importance for electronic devices. Barium titanate(BaTiO 3 ) have been widely explored for polymer-based dielectric composites owning to its ultrahigh dielectric constant and commercial availability. However, due to the large difference of dielectric constant between BaTiO 3 and polymer matrix , the interface becomes fragile under electric field, which is not conducive for the improvement in breakdown strength and energy storage density . Herein, a flower like barium titanate/nickel hydroxide(BTO/Ni(OH) 2 ) core-shell structured filler has been fabricated to provide a novel approach to modify the interface between BTO and P(VDF-HFP) matrix for dielectric polymer composites . Ni(OH) 2 nanoflakes have grown in-situ on the surface of hydroxylated BaTiO 3 particles to form the flower like core-shell assemblies via hydrothermal reaction . Then, these synthetic BTO/Ni(OH) 2 particles with specific flower-like core-shell structure can be uniformly dispersed in P(VDF-HFP) without any additional surface modification due to their surface –OH groups. Meanwhile, Ni(OH) 2 shell triggered beta phase of P(VDF-HFP) near core-shell filler based on the interfacial interaction between Ni(OH) 2 and P(VDF-HFP). Thus, the intensity of the local electric field can be gradually reduced due to the formation of a dielectric constant gradient. Besides, these Ni(OH) 2 nanoflakes shell are able to cut down the local electric field and prevent the growth of electrical trees on the surface of BaTiO 3 during breakdown process. When the composite filler content is 10 wt%, the dielectric constant and breakdown strength increases to 14.8 and 330 kV/mm from 11 to 260 kV/mm, respectively. And the calculated energy density is 7.13 J/cm 3 , which is 1.5 times that of 10 wt% BTO/P(VDF-HFP) composite film . This study provides a novel shell material Ni(OH) 2 for the preparation of BTO core-shell structure filler, which has good compatibility with polymer substrates .
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
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Da Zu,Zhanpeng Zhang,Dongliang Shan,Wenjun Cao,Yunya Liu
The thermal failure bottleneck in high-power polymer capacitors severely limits their energy storage performance breakthroughs. Composite materials combining excellent thermal management capabilities with high energy storage density represent an effective solution to this problem. This study proposes an integrated energy storage-thermal management design strategy: using a relaxor ferroelectric polymer P(VDF-TrFE-CFE) as the matrix and incorporating Ba 0.6 Sr 0.4 TiO 3 (BST) nanoparticles with varying weight fractions (0–23.08 wt.%) to construct high-performance polymer-based nanocomposites. By synergistically regulating the interfacial polarization effect and polarization entropy change, dual breakthroughs in electrocaloric (EC) cooling and energy storage performance are achieved. This study employs infrared thermal imaging technology to directly measure the EC response of composite films. Experimental results show that when the BST weight fraction is 16.67 wt.%, the composite achieves optimal overall performance: under an electric field of 110 MV m −1 , the recoverable energy density W rec reaches 4.26 J cm −3 , which is a 20.34% improvement over the pure polymer, with the η of 70.17%; under an electric field of 100 MV m −1 , the EC temperature change reaches 5 °C, representing a 32.63% enhancement compared to the pure polymer. Therefore, this work achieves a synergistic enhancement of dielectric energy storage and EC cooling performance within a single material system.
研究领域:
材料科学
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能量存储
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介电材料
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热管理
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铁电聚合物
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纳米复合材料
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·Vol. 37
·期 43
·e07832
·
IF 26.8
Tianhao Chen,Zhefeng Liu,Sha. Sha,Rui Wang,Siwei Chen,Yalan Sun,Hancong Zheng,Aihua Chen
Solar ultraviolet (UV) radiation, a primary cause of skin cancer and erythema, poses irreversible risks to human health, underscoring the urgent need for advanced solar UV detector. Herein, we present a novel intrinsically flexible UVA detector featuring real-time monitoring, high performance and recyclability. This breakthrough is achieved through engineered oriented composite fabrics combining main-chain azobenzene-thermoplastic polyurethane elastomers (Az-TPU) with piezoelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanogenerators. The molecular architecture employs azobenzene groups and 4,4′-methylene diphenyl diisocyanate (MDI) as hard segment, while polytetramethylene ether glycol (PTMG) forms the soft segment. The physical cross-linking network and homogeneous microphase-separated structure enables the fabrics to generate substantial internal stress, resulting in superior photoelectrical conversion capabilities. The device we report achieves an 80 ms response time and maintains excellent linear correlation (R 2 = 0.997) across a broad light intensity range (0.05–50 mW·cm −2 ). Remarkably, the fabric achieves dynamic UV light monitoring when subjected to a tensile strain of 10%. Integrated with Bluetooth communication, the device enables real-time data transmission to mobile devices for continuous UVA intensity and dose monitoring throughout daily sunlight exposure. With demonstrated capability for solar UVA measurement, this technology presents significant industrial potential for wearable solar UV monitoring systems.
研究领域:
材料科学
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可穿戴电子学
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光电探测器
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环境监测
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2018
·
IF 13.12
Bing Xie,Qi Zhang,Ling Zhang,Yiwei Zhu,Xin Guo,Pengyuan Fan,Haibo Zhang
The development of advanced dielectric materials with high discharged energy densities is of critical significance for modern electric devices and electric power systems . In this report, linear/ferroelectric bilayer-heterostructured polymer nanocomposites with an ultrahigh discharged energy is presented for the first time. The linear polyimide (PI) is employed as bottom insulating layer to provide high breakdown strength ( E b ), while ferroelectric P(VDF-CTFE) with dispersed BaTiO 3 nanoparticles as the top layer, provides a high dielectric constant . This linear/ferroelectric bilayer dielectric material exhibits enhanced E b and ( D max - P r ) values, which can be attributed to the interfacial barrier and the interfacial polarization effect at the interface of two layers. Favorable distribution of the local electric field within this bilayer dielectric reveals the implication of the collaborative double interface effects on the energy storage performance of the nanocomposites. As a result, the bilayer-heterostructured nanocomposite displays an ultrahigh discharged energy density of 14.2 J/cm 3 at 370 MV/m. This energy density is among the highest under the equivalent electric field strength reported so far. This work not only provides a new design to optimize the performance of the dielectric nanocomposites for flexible energy storage applications , but also develops the understanding of the breakdown and polarization mechanism of dielectric materials.
研究领域:
材料科学
·
电介质材料
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能源存储
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纳米技术
·
聚合物科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengli Tao,Guangyuan Du,Wenwu Zou,Jiaqi Cao,Wei Li,Guangli Zheng,Zhenxing Liang,Zhiming Cui,Li Du,Huiyu Song
The performance of thin lithium metal anodes is affected due to issues that weaken the electrode-electrolyte interphase. In this work, a coating layer serving as a Li + traffic controller based on hexadecyl trimethyl ammonium bis(trifluoromethanesulphonyl)imide ([CTA][TFSI]) and poly (vinylidene difluoride co-hexafluoropropylene) (P(VDF-HFP)) is used to stabilize the thin lithium metal interface. The CTA + ions in the coating layer can effectively regulate the distribution of Li + concentration to promote uniform deposition of lithium. The anion of [CTA][TFSI] can optimize solid electrolyte interphase (SEI) with inorganic-rich components, which improve the ionic conductivity and reaction kinetics. Furthermore, the flexible polymer skeleton can fortify the fragile SEI, facilitating the consistent operation of the battery. Due to these improvements, a thin Li metal anode (4 mAh cm −2 ) with a coating layer in a Li||Li symmetric cell demonstrates a lifespan of 600 h at 1 mA cm −2 and 1 mAh cm −2 . Notably, full cells with an ultra-low negative electrode/positive electrode = 1 (N/P = 1) demonstrate a stable performance over 200 cycles and 90 cycles at 0.5C and 1C (1C = 170 mA g −1 ), respectively.
研究领域:
材料科学
·
电化学
·
电池技术
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhenji Zhou,Caiyin You,Jizhe Jia,Weimin Xia,Zhong Li,Heguang Liu,Na Tian
Polyvinylidene difluoride (PVDF) and its copolymers are commonly used in triboelectric nanogenerators (TENGs) due to their flexibility and good mechanical–electrical properties. In this study, poly[(vinylidene fluoride)-co-trifluoroethylene] [P(VDF-TrFE)] composites were fabricated by embedding polydopamine (PDA)-coated cobalt ferrite nanorods (RCFO). A stripe-like microstructure was formed by applying a magnetic field during the curing process. The TENG was built with a polytetrafluoroethylene (PTFE) film as the negative friction material. Due to the enhanced micro–nano structure of the P(VDF-TrFE) films, the increased charge transfer occurred between the RCFO@PDA/P(VDF-TrFE) composite film and the PTFE film. Good triboelectric performance was realized, with an open-circuit voltage of 33.20 V, a short-circuit current of 1.20 μA, and a transferred charge of 13.17 nC at a frequency of 5 Hz and a vertical contact force of 15 N. Additionally, a peak power density of 32.5 μW cm −2 was achieved when connected to an external load resistor of 20 MΩ. In practical applications, the TENG could directly illuminate a series of 36 connected light-emitting diodes without the need for capacitors. The device's ability to capture stray magnetic fields was also demonstrated. A wireless transmission-based remote security system was demonstrated as the self-powered sensor in a noncontact mode.
研究领域:
纳米技术
·
能量收集
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传感器
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无线通信
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安全系统
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材料科学
·
聚合物复合材料
✓ 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）