JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Jianqi Sun,Xiangming Yao,Caohua He,Yaogang Li,Qinghong Zhang,Chengyi Hou,Yu Qiu,Hongzhi Wang
The solid-state electrolytes (SSEs) are considered as a decent solution to rationally supersede the liquid one for the sake of dependable operation security and higher energy density when it comes to the next-generation lithium (Li) metal batteries . Herein, a sort of composite solid electrolyte with in-built ion-conductive 3D framework is designed to enable the stable performances of Li-metal batteries . The framework comprised of the Li + -conducting garnet components (Li 6.75 La 3 Zr 1.75 Nb 0.25 O 12 , LLZN) and polyvinylidene fluoride- co -hexafluoropropylene (PVDF-HFP) provides the vulnerable part with mechanical support and well-behaved electrochemical stability. Stemmed from this embedded framework, the whole electrolyte exhibits high Li + conductivity (4.6×10 −4 S cm −1 ), improved high-voltage endurance (4.4 V versus Li/Li + ), better Li-anode compatibility and high-temperature feasibility. Additionally, the synergistic enhancements between LLZN and PVDF-HFP potentially facilitate the homogeneous ionic flux, thereby resulting in the persistence of a sound solid-electrolyte interphase. The solid-state batteries assembling composite solid electrolyte also deliver the preferable battery performance, featuring high-capacity output with stable cyclability. Application of this electrolyte in a pouch cell further demonstrates its feasibility and flexibility. This design concept is anticipated to give the way of exploring brand new solid electrolytes and boosting their overall electrochemical performances toward practicality.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Weixu Tian,Junyun Zhang,Yue Yu,Zhihua Wen,Jinjin Song,Di Pan,Dawei Li,Jing Li,Sunhee Lee,Jingye Jin,Chenhong Lang
The efficient conversion of ambient acoustic energy into electrical power has attracted considerable research interest for its potential to sustainably power microelectronics and self-powered sensors. Nevertheless, the development of an acoustoelectric transducer that simultaneously delivers broadband response, high conversion efficiency, and substantial power output remains a pressing challenge. Herein, we report a broadband high-output acoustoelectric transducer. The device architecture features an electrospun barium titanate (BTO)/poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) nanofiber membrane, sandwiched between two gold-coated poly(ethylene terephthalate) electrodes with a precisely engineered air spacer. Upon acoustic wave excitation, the membrane and electrode exhibit contact-separation motion, simultaneously exciting both piezoelectric and triboelectric effects. The optimized device, comprising a 0.5 mm air spacer and a 3% BTO-doped PVDF-HFP nanofiber membrane, achieves a peak output of 410.28 V and 50.24 μA under 115 dB acoustic excitation at 170 Hz. The instantaneous maximum power density reaches 11576.12 μW/cm3 (the peak surface power density is 845.06 μW/cm2). The electrical energy generated can directly power miniature electronic devices without additional energy supplying equipment. This structure effectively converts acoustic waves into an electric signal from 1 to 5000 Hz (including infrasound). Therefore, the device holds potential for detecting and warning against natural disasters associated with infrasound emissions. This acoustoelectric transducer thus exhibits promising application prospects in noise energy recovery, environmental monitoring, self-powered systems, speech recognition, and human-computer interaction.
✓ 已验证
DOI
高影响因子
iScience
·
2026
·Vol. 29
·期 8
·
IF 4.5
Yumei Lin,Ya-Hsin Pai,Shoubo Li,Chao Wang,Jincheng Liao,Fan Wu,Zhen Xu,Qingfeng Song,Yi Feng,Ziqi Liang,Lidong Chen,Shengqiang Bai
Existing bimodal sensors rely on complex multimaterial integration and system topologies, hindering healthcare diagnostics. This work presents a sensor using single-material PVDF-HFP ionogel with a sandwich structure, enabling simultaneous, accurate temperature, and pressure monitoring. Decoupled sensing is achieved via two distinct mechanisms within one material: the ionic thermodiffusion (Soret) effect for temperature and interfacial electrical double-layer (EDL) capacitance for pressure. The sensor exhibits high performance: a temperature sensitivity of 4.2 mV K −1 (limit of detection, LOD: 0.05 K) with < 10 s response time, and pressure sensitivity of 1.35 kPa −1 (LOD: 11 Pa) with < 60 ms response time. Optimized processing yields high-reliability ionogels; unencapsulated samples maintained 93% thermopower after three months of air storage. Finally, sensor arrays integrated into a glove successfully distinguished and mapped pressure and temperature stimuli, demonstrating feasibility for wearable electronics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 35
·48113-48123
·
IF 7.8
Kong Yong,Lai Zhengbo,Dai Xiaolei,Xu Fuhao,Shen Xiaodong
Polymer-based aerogels exhibit high thermal management performance including insulation and passive radiative cooling. However, the lack of elasticity limits their application. Herein, we developed an elastic poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF-HFP)-based aerogel (PFHS) for efficient thermal management. PFHS achieves a low thermal conductivity of 0.035 W/(m·K), a high solar reflectance of 98.18%, and a mid-infrared emissivity of 96.85%, as well as high hydrophobicity with a water contact angle of 140 ° . PFHS exhibits a high temperature reduction of 9.8 ° C and an outdoor daytime cooling power of 116.68 W/m 2 under an average solar irradiance of 821.14 W/m 2 . It also has superior thermal insulation performance under cold (−20 ° C) and hot (60 ° C) conditions. Moreover, PFHS has excellent weather resistance and thermal stability. These attributes establish PFHS as a promising prospect for the efficient thermal and environmental management of buildings and outdoor facilities, offering a new strategy for the development of multifunctional polymer aerogels.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2026
·
IF 5.2
Xu Li,Meng-Nan Liu,Tong Zhang,Gang Zheng,Ru Li,Jun Zhang,Qing-Ru Shao,Wen-Peng Han,Yun-Ze Long
Currently, electrospun nanofiber membranes are widely used in sensor and photocatalysis research fields. In this study, polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) flexible nanofiber membranes were successfully prepared by electrospinning technology. The narrow band gap semiconductor tin selenide (SnSe) was innovatively introduced as a functional filler, and a SnSe/PVDF-HFP composite fibrous membrane with excellent piezoelectric and photocatalytic dual properties was developed. By systematically optimizing the load process parameters of SnSe, including loading methods, hydrothermal duration for crystal size control, and ultrasonic time for loading amount regulation, the piezoelectric properties of the material were significantly improved. Experimental results demonstrate that the composite fibrous membrane exhibits outstanding dual functionality: On one hand, the flexible sensor based on its piezoelectric properties achieves an output voltage of 23.1 V and a sensitivity of 440 mV–1, enabling precise monitoring of human motion. On the other hand, the piezo-photocatalytic synergistic enhancement mechanism is proposed based on kinetic studies. Under the combined action of light irradiation and ultrasonic vibration, the composite fibrous membrane as a catalyst achieves 99.0% degradation rate of methylene blue within 120 min while maintaining excellent stability and recyclability, effectively addressing the recovery challenges of traditional powder catalysts. This work not only provides a novel material design strategy for integrating piezoelectric sensing and photocatalytic dual functions but also opens innovative pathways for developing wearable flexible electronic devices and easily recoverable catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO
·
2021
·
IF 1.556
Dong Yue,Xiaoxu Liu,Jinghua Yin,Yu Feng,Jialong Li,He Zhao,Yanpeng Li,Li Li
Polymer dielectric capacitors, with their high energy storage density and fast release of energy, have recently received increasing attention for their ability to meet the critical requirements of pulsed power devices in low-consumption systems. In this context, this paper reports that surface-modified single-walled carbon nanotubes (SWCNT) were successfully synthesized and used as fillers to improve the energy storage and mechanical performance of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)-based composites. The PVDF-HFP/SWCNT composites realize high dielectric constants and low percolation thresholds of 62 and 0.25, respectively. In particular, when composites possess an SWCNT content of only 0.4 vol.%, an acceptable energy storage density of 0.24 J/cm 3 at a low electric field of 700 kV/cm along with a high energy storage efficiency (74%) is also observed. Meanwhile, the tensile strength and breaking elongation are 44 MPa and 8.1%, respectively. According to detailed characterization results, SWCNT with low filling are uniformly dispersed and show a certain orientation in PVDF-HFP after surface modification, which is the key to improve the composite performance. These results provide an effective method for fabricating flexible-polymer composites with a high density of energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 42
·425401
·
IF 3.551
Meng Cheng,Tao Qu,Jie Zi,Yaochun Yao,Feng Liang,Wenhui Ma,Bin Yang,Yongnian Dai,Yong Lei
A ceramic in polymer hybrid solid electrolyte (HSE) based on a poly vinylidene fluoride-hexafluoropropylene (PVDF-HFP) polymer comprising Na3Zr2Si2PO12 (NASICON) ceramic particles was prepared by a simple solution casting method followed by activation in a liquid electrolyte. The prepared HSE exhibits good flexibility, high ionic conductivity of 2.25 × 10−3 S cm−1 at room temperature (RT), and good interface stability. The carbon coated sodium vanadium phosphate (Na3V2(PO4)3/C) cathode was synthesized by the sol-gel method and assembled into batteries with different electrolytes. The batteries based on HSE exhibit better electrochemical performance than that of NASICON ceramic solid electrolytes, which delivers a reversible capacity of 98 mAh · g−1 at 0.2 C and exhibits good capacity retention of 85% after 175 cycles at 0.5 C. Not only does the HSE inherit great flexibility, but also exhibits good interfacial contact with electrodes. The schematic diagram of Na-ion conductivity in ceramic, polymer and HSE was illustrated to demonstrate the sodium ion transport mechanism. The HSE with high ionic conductivity and good flexibility for interfacial contact with electrodes shall provide a designing strategy for different solid-state batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xinya Wang,Qi Wang,Wei Zhang,Ruirui Cao,Mingxing Chen,Changfa Xiao
With the escalating issue of air pollution, the development of air filtration materials that can efficiently remove particulate pollutants, particularly nanosized particles, from air has attracted more and more research attention in recent years. Electrospun nanofiber membranes with a nanoscale pore structure have been widely used as air filtration materials. Along these lines, in this work, polyvinylidene fluoride-co-hexafluoropropyle (PVDF-HFP) nanofiber membranes with a multihierarchical gradient structure were fabricated by varying the sodium dodecyl sulfate (SDS) concentration. The proposed multihierarchical gradient structure was composed of upper, middle, and lower nanofiber layers, which could effectively filter PM0.3. The decreased nanofiber diameter by increasing the SDS concentration was attributed to the low surface tension and high charge balance. Compared with the single- and double-hierarchical PVDF-HFP nanofiber membranes, the triple-hierarchical PVDF-HFP nanofiber membranes demonstrated excellent air filtration performance. Among them, F014 yielded optimal air filtration performance, exhibiting a high filtration efficiency of 99.50%, a low pressure drop of 71.4 Pa, and a quality factor of 0.0878 Pa–1. Furthermore, the filtration efficiency was maintained above 99% and the pressure drop just increased by 27.4% over a 40 min air filtration test, which indicated that F014 showcased exceptional durability, owing to the multihierarchical gradient structure. Our work paves the way for the fabrication of electrospun nanofiber membranes with a multihierarchical gradient structure using a straightforward method, highlighting their potential as an alternative to traditional air filter materials for various practical applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2019
·Vol. 12
·期 4
·908-914
·
IF 7.804
Jingna Liu,Xingyi Shi,Bismark Boateng,Yupei Han,Dongjiang Chen,Weidong He
Graphical A stable hierarchy : A hierarchical structure is constructed from a stable heterogeneous-phase gel by blending dissolved and undissolved polyvinylidene fluoride-hexafluoropropylene (PVDF–HFP) powders in acetone while adding N -methyl-2-pyrrolidone (NMP) to form a hierarchical inner-bound structure within the PVDF–HFP separator. LiFePO 4 /Li cells containing the solidified hierarchical structure exhibit a remarkable rate capacity of 95 mAh g −1 at 10 C and an excellent long-term cyclical stability with zero capacity fading after 1000 cycles. An efficient, scalable, and cost-effective approach was developed to synthesize a hierarchically constructed polyvinylidene fluoride-hexafluoropropylene (PVDF–HFP) separator from an instantly reformed solution. With partially dissolved PVDF–HFP as separator skeleton, the incorporation of warm PVDF–HFP solution in acetone led to a cross-linked structure before N -methyl-2-pyrrolidone (NMP) was added to solidify the hierarchical inner-bound structure of fresh PVDF–HFP. Owing to its hierarchical microporous structure, the separator exhibited remarkable wettability with a small contact angle of 18° and an electrolyte uptake of 114.81 %, leading to a high room-temperature ionic conductivity of 3.27×10 −3 S cm −1 . The hierarchical structure provided short pathways for efficient ion transfer with more electrolyte trapped inside and small intervals between adjacent nanopores. The separator outperformed commercial separators, showing high rate capacities of 104.8 mAh g −1 at 5 C and 95 mAh g −1 at 10 C as well as unparalleled perfect capacity retention at 10 C after 1000 cycles.
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 MEMBRANE SCIENCE
·
2024
·
IF 8.4
Xinya Wang,Ronggui Wang,Yongshuo Zhang,Juntong Meng,Wei Zhang,Ruirui Cao,Mingxing Chen
As industrialization intensifies and the population soars, the challenge of air pollution escalates into a pressing concern. Electrospun nanofiber membranes, owing to their distinctive attributes including high specific surface area, porosity, and uniform pore size distribution, have emerged as promising candidates for air filtration. In this study, we successfully prepared ZnO@polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) antibacterial nanofiber membranes through a combined solvothermal and coaxial electrospinning approach. The structure and performance of these nanofiber membranes were systematically modulated by adjusting the shell feeding rate and zinc acetate dihydrate (Zn(Ac) 2 ·2H 2 O) concentration. Specifically, an increase in the shell feeding rate led to a decrease in fiber diameter, accompanied by the proliferation of nano-beads, thereby contributing to a reduction in membrane pore size. Consequently, a heightened shell feeding rate correlated positively with both filtration efficiency and pressure drop. Furthermore, the incompletely reacted Zn(Ac) 2 ·2H 2 O enhanced the conductivity of the spinning solution, facilitating a decrease in pore size and enhancing air filtration performance. In summary, when the shell feeding rate was 0.60 mL h −1 and Zn(Ac) 2 ·2H 2 O concentration was 1.5 wt%, the obtained ZnO@PVDF-HFP nanofiber membrane exhibited superior air filtration performance, with high filtration efficiency of 99.91 %, low pressure drop of 80.70 Pa and noteworthy quality factor of 0.08781 Pa -1 . Notably, these membranes sustained their high filtration efficiency and low pressure drop even after 40 min of continuous testing, underscoring their exceptional stability. In addition, the obtained nanofiber membrane exhibited robust antibacterial activity against both Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), demonstrating their multifaceted potential. Our work not only simplifies the fabrication process of electrospun nanofiber membranes with superior air filtration and antibacterial properties but also highlights their potential as innovative alternatives to conventional air filter materials, poised for diverse practical applications.
研究领域:
材料科学
·
环境科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 10
·2671-2679
·
IF 2.5
Gu Yuanchun,Liu Huaqian
Significant ultraviolet (UV) technology was used to create a new composite polymer electrolyte (CPE) membrane composed of poly (vinylidene fluoride-hexafluoropropylene) (PVDF-HFP), benzophenone (Bp), and varying amounts of highly ion-conducting Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) particles. In lithium metal batteries, the CPE membranes demonstrated improved mechanical properties as well as superior electrochemical performances. CPE-15wt% LLZTO typically demonstrated the highest ionic conductivity (σ = 3.7 × 10 −3 S/cm) at room temperature, a high Li-transference (t + = 0.79), and a wider electrochemical stability window (ESW) above 5 V, as well as good mechanical strength (8.2 MPa). More importantly, the CPE-15wt% LLZTO membrane inhibits Li dendrite expansion in Li symmetric cells and exhibits long-term cyclic stability with a current density of 3 mA/cm 2 over 1150 h for Li/CPE-15wt% LLZTO/Li. The current study demonstrates that a UV-irradiated CPE membrane can be a promising electrolyte for next-generation lithium-metallic batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 22
·1766
·
IF 3.2
Wang Dingqin,Fei Zihao,Zheng Deyi
Perovskite-structured Li 0.33 La 0.56 TiO 3 (LLTO) ceramic fillers are widely used for their low cost and environmental friendliness, yet their poor uniform dispersion in polymer matrices and inadequate interfacial compatibility between phases still limit performance. This study fabricated PDA@LLTO/PVDF-HFP composite electrolytes via solution casting, by modifying LLTO with a biodegradable polydopamine (PDA) coating. Dopamine undergoes oxidative self-polymerization on LLTO surfaces to form a PDA layer, whose excellent adhesion ensures firm binding to the LLTO surfaces, reducing filler surface energy and promoting uniform dispersion. Meanwhile, PDA’s phenolic hydroxyl and amino groups interact with PVDF-HFP’s fluorine and carbonyl groups via hydrogen bonding, electrostatic interactions, and physical entanglement, forming a strong interface. PDA reduces interfacial gaps and defects by acting as a “molecular bridge” to improve adhesion between the two phases. Results show the 2.4 wt%-PDA@LLTO/PVDF-HFP composite exhibits well-balanced electrochemical performance: an ionic conductivity of 2.37 × 10 −4 S cm −1 at 25 °C, an interfacial impedance reduced from 367 to 167 Ω, a lithium-ion migration number of 0.81, and an electrochemical stability window expanded to 4.88 V, The critical current density reaches 2.297 mA/cm 2 . The assembled solid-state full batteries deliver an initial discharge capacity of 168.59 mAh/g at 0.5 C, retaining 148.80 mAh/g (88.3% capacity retention) after 180 cycles, with Coulombic efficiency stabilized at 99.6% and significantly improved thermal stability. This work provides new insights for developing high-performance all-solid-state electrolytes, which hold promising applications.
✓ 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）