IEEE SENSORS JOURNAL
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2024
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IF 4.3
Da Yang,Zhe Qu,Fei Li,Siyuan Lu
A convenient and less time-consuming approach for developing an optical oxygen sensing film with excellent balance between sensing performance and operating stability is addressed in the current work. In order to achieve better mechanical strength and resistance against ultraviolet (UV) degradation, a series of oxygen sensing films were prepared by embedding Pt (II) meso-tetra (pentafluorophenyl)porphine (PtTFPP) in the hosting copolymer matrices, which comprised different blending ratios of plasticized polyvinyl chloride (PVC) and poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) on polypropylene porous fiber membrane. The microstructure and optical properties of the sensing films were characterized by using scanning electron microscopy (SEM), laser confocal microscopy, and fluorescence spectrometer. Phase delay measurement under different oxygen partial pressure (PO $_{{2}}\text {)}$ and temperature was conducted to evaluate the sensing performance and temperature compensation models of the sensing films for oxygen monitoring. Results show that the response time of the sensing films were all less than 10 s. The sensitivities and detecting ranges of the sensing films were increased and decreased with the reduction in PVC/PVDF-HFP ratio. When PVC/PVDF-HFP ratio reached 1:2, sensing film exhibits the best sensitivity of 0.334 kPa $^{-{1}}$ and the smallest phase reduction rate of 0.0045°/h after 24 h of continuous irradiation by UV light, presenting a promising utilization potentiality in fields of gaseous oxygen detection.
研究领域:
材料科学
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光学传感
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Zhenzhen Dong,Xiang Wang,Shicheng Miao,Lige Wang,Yiran Xiang,Zinuo Zhao
To address the issue of thermal runaway in lithium-ion batteries while simultaneously enhancing their electrochemical performance, this study fabricated a sandwich-structured composite separator of PVDF-HFP@UIO-66/PEO/PVDF-HFP@UIO-66 via electrospinning, which was further enhanced by impregnation with PMMA. In this design, the two outer PVDF-HFP@UIO-66 layers aim to improve electrochemical performance and mechanical stability, while the PEO core layer enables thermal shutdown at approximately 67 °C. The composite separator exhibits high ionic conductivity (3.25 mS cm −1 ), excellent thermal dimensional stability, and good mechanical strength (13.6 MPa). Cells assembled with this separator achieved an initial discharge specific capacity of 166.2 mAh g −1 at 0.5C, with a capacity retention rate of 97.9% after 100 cycles, significantly outperforming cells using a commercial separator (133.1 mAh g −1 , 96.9%). Accelerating rate calorimetry (ARC) tests further confirm its exceptional safety, delaying the time to reach the thermal runaway critical temperature by 194.1 min and raising that critical temperature by 4.5 °C. This work presents an effective strategy for designing battery separators that combine high safety with superior electrochemical performance.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2020
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IF 2.627
Yingfei Hou,Lin Jiang,Yaoyao Zhang,Zhiwen Qin,Chi Jiang,Ming Wang
Lithium-air (also known as lithium-oxygen) batteries have attracted considerable global attention in recent years due to their extremely high energy density (11,140 W·h·kg −1 ). The electrolyte is a key element in lithium-air batteries and the traditional organic electrolyte has great safety risk due to leakage. On the contrary, the polymer electrolyte has the advantages of high safety, high stability and easy processing comparing with the organic liquid electrolytes. In this paper, a new idea was proposed to coat the Nafion membrane on a layer of polymer for blocking the oxidation reduction electric (RM) and Li based on the selective permeability on lithium ion of the Nafion membrane. Self-made thickness-controllable Nafion membrane, polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP) and 2,2,6,6-tetramethylpiperidinooxy (TEMPO) were used to prepare a quasi solid polymer electrolyte (NSPE). Electrochemical workstation and LAND battery testing system were used to perform a galvanostatic charge/discharge test on Li-O 2 . The ionic conductivity of NSPE was 4.3 × 10 −4 S·cm −1 at room temperature and the discharge platform was 2.6 V and the charging voltage was 3.7 V after 50 cycles with the cut-off capacity of 500 mA·h·g −1 .
研究领域:
材料科学
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电化学
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DOI
高影响因子
IONICS
·
2012
·Vol. 19
·期 5
·757-762
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IF 1.288
Ran Ying,Yin Zhoulan,Ding Zhiying,Guo Huajun,Yang Jing
A polymer electrolyte based on the blending of poly(vinylidene fluoride-hexafluoropylene) (PVDF-HFP) and hydroxypropyl methyl cellulose (HPMC) was prepared for the first time. The structure and performance of the gel polymer electrolyte were characterized and measured by X-ray diffraction, Fourier transform infrared, thermogravimetric analysis, scanning electron microscopy, electrochemical impedance spectroscopy, linear sweep voltammetry, and by a charge/discharge test. The results show that the gel polymer electrolyte has the best performance when PVDF-HFP/HPMC ratio ( w / w ) is 4:1. At room temperature, the ionic conductivity can reach 0.38 × 10 −3 S cm −1 , the electrochemical stable window is up to 5.0 V (vs. Li/Li + ), and the half cell of Li/GPE/LiMn 2 O 4 shows high-discharge-specific capacity and good cycling performance.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
ENERGY & FUELS
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2025
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IF 5.3
Xin Jiang,Xue-Tong Hu,Yi-Wei Fan,Ting-Ting Chen,Kun-Rong Lu,Peng-Fei Wang,Yu-Han Wu,Fa-Nian Shi,Yu-Hang Zhang
The poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) is expected to prepare electrolytes with wide electrochemical window owing to its excellent antioxidant capability. However, the inert lithium ion conduction of the C–C skeleton severely limits its electrochemical application. In this work, high-voltage-resistant sulfolane (SL) is used as a plasticizer into the PVDF-HFP skeleton to prepare gel electrolytes. Moreover, to alleviate the incompatibility of SL with lithium metal by the strong dipole–dipole interaction between poly(ethylene oxide) (PEO) and SL, a plasticized PVDF-HFP/PEO gel polymer electrolyte (PPS-GPE) was achieved, which exhibits a high ionic conductivity of 1.67 × 10–4 S cm–1 and an electrochemical stability window of 4.8 V. The assembled Li||LiCoO2 cells show a high average discharge capacity of 153 mA h g–1 between 3.0 and 4.4 V, with a retention of 77% within 400 cycles at 0.2 C. This work provides a new strategy for the development of high-voltage, high energy density, and high safety lithium metal batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Small
·
2024
·
IF 13
Ya Liu,Wangshu Tong,Jialin Zhuang,Yihe Zhang
Polyaniline (PANI), a typical organic photocatalyst, has an adjustable structure and good stability, can be easily synthesized on a large scale, and is economical. PANI is doped with ions to regulate its internal structure and improve its photocatalytic performance. However, its photocatalytic performance is limited by the doping concentration and its intrinsic properties, hindering its further application. Herein, PANI films with a piezo-photocatalytic function are fabricated to improve photocatalytic performance and explore their self-powered environmental purification property. PANI/poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) sandwich films, with PVDF-HFP as the interlayer, are prepared by introducing a piezoelectric field into PANI photocatalysts, thereby achieving excellent piezo-photocatalytic performance. The as-fabricated piezo-photocatalyst degrades methyl orange at a rate of 91.2% after 60 min under magnetic stirring. Owing to the low Young's modulus of the all-organic catalyst, self-powered purification is realized using the PANI/PVDF-HFP film. Leaf surfaces are functionalized by loading the film in them for removing pollutants under sunlight and water flow. Thus, this study proposes a common strategy, wherein a piezoelectric interlayer is introduced to load the organic photocatalyst for preparing an all-organic piezo-photocatalyst. This piezo-photocatalyst can be easily recycled and responds to weak forces, realizing its application for self-powered environmental purification.
研究领域:
材料科学
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环境科学
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有机化学
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DOI
PubMed
高影响因子
Gels
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2025
·Vol. 11
·期 5
·317
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IF 5.3
Xiubing Yao,Lingxiao Lan,Qiankun Hun,Xuanan Lu,Jianghua Wei,Xinghua Liang,Pengcheng Shen,Ying Long,Yifeng Guo
Solid-state electrolytes are widely expected to enhance the performance of lithium-ion batteries, providing higher energy density and improved safety. However, challenges still need to be solved in their practical application due to low ionic conductivity and high interfacial resistance at room temperature. In this study, we successfully developed a high-performance gel polymer electrolyte (GPEs) by blending poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP) and polyacrylonitrile (PAN) through UV curing, cross-linking with ethoxylated trimethylolpropane triacrylate (ETPTA), and incorporating Li6.4La3Zr1.4Ta0.6O12(LLZTO). At room temperature, the ionic conductivity of the GPEs was 2.8 × 10−4S/cm, with a lithium-ion transference number of 0.6. Moreover, during lithium plating/stripping tests, the assembled Li/PPEL/Li symmetric cell exhibited stable cycling for up to 600 h at a current density of 0.1 mA/cm2. Notably, the GPEs enabled the LiFePO4/GPEs/Li battery to achieve excellent performance, delivering high discharge capacities at room temperature (164.3 mAh g−1at 0.1 C and 88.8 mAh g−1at 1 C), with a capacity retention of 89.4% after 200 cycles at 0.5 C. Therefore, solid-state batteries using this electrolyte exhibit excellent performance, including adequate capacity and cycling stability.
研究领域:
材料科学
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能源存储
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Haitao Ren,Abdelkader Labidi,Atif Sial,Zongcheng Miao,Yuzhen Zhao,Xiangbo Feng,Jianmin Luo,Chuanyi Wang
Enhancing the charge separation efficiency of photocatalysts is crucial to their catalytic activity, which is still challenging. Herein, nitrogen-doped carbon quantum dots ( N -CQDs) were combined with Bi 2 WO 6 to construct an N -CQDs/Bi 2 WO 6 heterocomposite, which was loaded onto the surface of polyvinylidene fluoride- co -hexafluoropropylene (PVDF-HFP) membrane to design a flexible, porous and hydrophilic N -CQDs/Bi 2 WO 6 @PVDF-HFP photocatalytic membrane. Piezo-response force microscopy (PFM) and the maximum effective piezoelectric coefficient ( d33 ) measurements demonstrate that the PVDF-HFP membrane has favorable piezoelectric properties. Besides, fluid-induced mechanical energy can generate a piezoelectric field within the PVDF-HFP membrane. Theoretical calculations indicate that the difference in work function at the N -CQDs/Bi 2 WO 6 heterocomposite interface creates an inherent electric field. Therefore, the synergistic effect of the two electric fields improves the separation and migration efficiency of photogenerated carriers in N -CQDs/Bi 2 WO 6 heterocomposite. The membrane effectively removed 85.3 % of oxytetracycline (OTC) under the synergistic driving of water flow (900 r/min) and visible light, surpassing the results of only water flow (34.4 %) and visible light (63.1 %). Furthermore, the degradation performance of the membrane towards OTC remains almost unchanged after multiple recycles, highlighting its favorable reusability. This work addresses the issue of powdery catalysts in recovering for practical applications and underlines the potential of integrating with natural low-frequency water flows to purify organic-contaminated wastewater.
研究领域:
环境科学
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材料科学
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光催化技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Xiaobo Li,Qi An,Haitao Li,Yi Zhang,Zhensheng Chen,Kaixuan Teng,Jialin Zhuang,Yihe Zhang,Wangshu Tong
In this study, we prepared polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) membranes with fluorosilane-modified graphene sheets (rGO-PFOES) as fillers by a solution casting method, and Conducted research on dielectric , piezoelectric , energy conversion, and storage properties. The filler presents denser DOS than neat rGO and is effective in photothermal conversion. Because of such merits, the films not only convert mechanical disturbance into electricity, but also generate electricity under simulated solar irradiation. Furthermore, we prepared porous films and the porosity significantly enhanced the piezoelectricity of the polymer film. The piezoelectric voltage and piezoelectric current of the film can reach 8.8 V and 600nA respectively.
研究领域:
材料科学
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能源工程
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电子工程
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DOI
高影响因子
Small Methods
·
2022
·Vol. 6
·期 8
·2200258
·
IF 15.367
Su Wang,Qifang Sun,Yue Ma,Zhenyu Wang,Hongzhou Zhang,Xixi Shi,Dawei Song,Lianqi Zhang,Lingyun Zhu
Poly(vinylidenefluoride- co -hexafluoropropylene) (PVDF-HFP) is one of the most promising candidate electrolyte matrices for high energy batteries. However, the spherical skeleton structure obtained through the conventional method fails to build continuous Li ion transmission channels due to the slow volatilization of high boiling solvent, leading to inferior cycling performance, especially in a Ni-rich system. Herein, a novel strategy is presented to enrich the Li ion transfer paths and improve the Li ion migration kinetics. The tactic is to prepare cross-linked segments through the PVDF-HFP matrix by adopting free radical polymerization and Li salt induced ring-opening polymerization. Most significantly, the visualization of the structure of as-prepared electrolyte is innovatively realized with the combination of polarization microscopy, transmission electron microscopy, scanning electron microscope-energy dispersive spectroscopy, PVDF-HFP, and cross-linked network form interconnected microstructures. Therefore, poly(glycidyl methacrylate and acrylonitrile)@poly(vinylidene fluoride-hexafluoropropylene) electrolyte presents a high ionic conductivity (1.04 mS cm −1 at 30 °C) and a stable voltage profile for a Li/Li cell after 1200 h. After assembly with a LiNi 0.8 Co 0.15 Al 0.05 O 2 cathode, a high discharge specific capacity of 190.3 mAh g −1 is delivered, and the capacity retention reaches 88.2% after 100 cycles. This work provides a promising method for designing high-performance polymer electrolytes for lithium metal batteries.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2018
·Vol. 6
·期 1
·1801330
·
IF 4.834
Muhammad Waqas,Shamshad Ali,Weiqiang Lv,Dongjiang Chen,Bismark Boateng,Weidong He
Highly efficient and thermally stable polyethylene-hexagonal boron nitride/poly(vinylidene fluoride-hexafluoropropylene) (PE-BN/PVDF-HFP) bilayer separator with microporous structure is prepared, for the first time with a wet chemistry method. The incorporation of hexagonal boron nitride particles in PE matrix promotes the interfacial interaction between PE and PVDF-HFP layers to prevent separation of layers and supresses dendrite growth owing to the strong adsorption energy with polymers, large interactive surface area, and superior mechanical capability. The PVDF-HFP layer provides additional thermally stable backbone while its inherent hydrophilic property and highly porous structure improve the overall performance of the separator. The bilayer separator owns a high electrolyte uptake of 348% and a thermal shrinkage of 6.6% upon annealing at 140 °C for 1 h. The lithium iron phosphate/lithium cell with the as-prepared separator owns a high ionic conductivity up to 4.4 × 10 −4 S cm −1 , and a room-temperature capacity of 120 mAh g −1 at 2 C with a 95% capacity retention after 500 cycles and a capability of 108 mAh g −1 at 4 C. The PE-BN/PVDF-HFP separator is a promising alternative of traditional multilayer separators for high-performance lithium-ion batteries.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Batteries & Supercaps
·
2024
·
IF 5.1
Minghua Chen,Wannian Liu,Yixin Wu,Yulong Liu,Yang Wang,Zhen Chen
Graphical Nb/Al-doped LLZO nanofillers were prepared using electrostatic spinning to construct a PVDF-HFP-based bilayer composite solid-state electrolytes (CSEs) membrane. The Li|CSE|LiFePO 4 cells achieve improved cycling and rate performance at room temperature. Composite solid-state electrolytes (CSEs) combining the advantages of polymer and ceramic electrolytes, are regarded as highly promising candidates for solid-state lithium metal batteries (SSLMBs). However, selecting appropriate polymer and ceramic materials, along with an effective combination method, is crucial in determining the performance of CSEs. To address the challenges of lithium dendrite inhibition and compatibility with cathodes simultaneously, herein, we have constructed a bilayer CSE based on poly(vinylidene fluoride)-hexafluoropropylene (PVDF-HFP). Al/Nb co-doped Li 6.25 Al 0.25 La 3 Zr 1.75 Nb 0.25 O 12 (LALZNO) nanofibers prepared by an electrostatic spinning technique, are incorporated as fillers to create high-throughput Li + transport pathways and enhance the overall performance of the CSE. Furthermore, polypropylene carbonate is introduced on the anode side of the CSE to enhance the wettability of lithium metal/CSE interface, thus improving the stability of lithium upon cycling. On the cathode side, succinonitrile is added to inhibit the crystallization of PVDF-HFP and facilitate the fast Li + transport. Consequently, the Li||Li cells demonstrate stable plating-stripping performance at 0.1 mA cm −2 for >520 h. In addition, the Li||LiFePO 4 full cells show improved cycling and rate performance. This work validates the effectiveness of developing bilayer CSEs and showcases their potential application in SSLMBs.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
危险品化学品经营许可证（带存储）