JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Xiaohui Li,Lifen Liu,Tong Liu,Danfeng Zhang,Changwei An,Fenglin Yang
Cathode membranes can provide innovative solutions for membrane-fouling mitigation and filtration performance enhancement, in combination with electric field in a new electrochemical system. In this research, a novel polyvinylidene fluoride/stainless steel/polypyrrole (PVDF/SS/PPy) cathode membrane was prepared via in situ flow-through electro-polymerization method. The PVDF/SS/PPy membrane exhibited excellent electric catalytic activity for 2-electron ORR (oxygen reduction reaction). A battery system with PVDF/SS/PPy membrane cathode and Fe sacrificial anode was developed for in situ •OH generation. A pH range of 3.5–4.0 is preferred and the area ratio of iron anode to PVDF/SS/PPy cathode membrane was ~1:6 according to the •OH production and iron consumption results. The phenol filtration tests suggested that the PVDF/SS/PPy cathode membrane has improved selectivity for removing small refractory organic pollutant such as phenol, the removal rate increased from 54.7% to 79.3%, while flux decreased from 152 L/(m 2 ·h) to 19 L/(m 2 ·h). The results of filtrating river water and BSA indicated that the PVDF/SS/PPy cathode membrane had excellent anti-fouling performance when the foulants load matches the •OH production.
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DOI
高影响因子
CHEMOSPHERE
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2019
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IF 5.108
Yahui Shi,Jinhui Huang,Guangming Zeng,Wenjian Cheng,Jianglin Hu,Lixiu Shi,Kaixin Yi
Photocatalytic membranes (PMs), coupling of membrane filtration and photocatalysis , have exhibited the potential for application in the wastewater treatment . In this study, we firstly adopted the supramolecular aggregates of melamine (M), cyanuric acid (C), and urea (U) in specific dimethyl sulfoxide (DMSO) as precursors to prepare carbon nitride MCU-C 3 N 4 with high photocatalytic performance, and a kind of novel-designed photocatalytic membrane was prepared via filtrating the mixture of graphene oxide (GO) nanosheets and MCU-C 3 N 4 on PVDF membrane supports, and then crosslinked using glutaraldehyde (GA) to construct a steady coating on the GO/MCU-C 3 N 4 /PVDF membrane. GO/MCU-C 3 N 4 /PVDF composite membrane exhibited higher permeation flux than that of GO/PVDF membrane and exhibited excellent separation performance for oil-in-water emulsion. A visible light-driven self-cleaning four-stage filtration by a self-built dead-end filtration system was carried out to evaluate membrane antifouling property, and GO/MCU-C 3 N 4 /PVDF membrane (M2) possessed higher flux recovery ratio (FRR) (∼92.36%) and lower irreversible fouling resistance (R ir ) ratio (∼8%) under 30min visible-light irradiation, maintaining relatively higher FRR (>72%) during 4 cycling of four-stage filtrating experiments. GO/MCU-C 3 N 4 /PVDF PMs are equipped with high permeation flux, separation performance, anti-fouling property and stability, indicating potential application in water treatment .
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yang Yu,Ying Xue,Jingxuan Zhao,Ke Ning,Shulin Sun
The global water pollution problem is increasingly severe, and the wastewater separation technology has received high attention. Polyvinylidene fluoride (PVDF) fiber membranes have a great potential in wastewater treatment. However, its large pore size and high porosity lead to low retention rate and high contamination, which make it impossible to reuse. In this study, it was assumed that the modified nanoparticles CNTs-COOH@TA were prepared by modifying CNTs with tannic acid (TA) through π-π conjugation, and were used as the support layer of the PVDF matrix by electrostatic spinning. The chitosan hydrogel was tightly bound to the PVDF-CNTs-COOH@TA nanofiber support through hydrogen bonding and electrostatic interaction to confer the strong hydrophilicity on the surface of the composite fiber membranes, and the composite PVDF-CNTs-COOH@TA-CS membranes should have excellent performance in PVDF water treatment. The PVDF-CNTs-COOH@TA-CS composite fiber membrane should have high hydrophilicity, high retention rate and reusability. Compared to other separation membranes, the composite membranes achieved effective separation of the oil-in-water emulsion and the dye wastewater while maintaining the rapid permeation of the aqueous phase. The pure water flux of the optimum CS3 composite membrane was 1907.8 Lm -2 h -1 bar -1 , which could completely separate oil-in-water emulsion and retain more than 90% of dyes. In addition, the flux recovery rate (FRR) of the CS3 composite membrane was still more than 86.8% after five cycles, and which had a good antifouling ability. The maximum tensile strength of CS3 increased by 279.7% over PVDF fiber membrane. This innovative approach based on synergistic modification of natural materials provides new ideas for the development of efficient and environmentally friendly wastewater treatment technologies.
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高影响因子
ACS Applied Energy Materials
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2021
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IF 6.024
Rong-Ao Tong,Linhui Chen,Bingbing Fan,Gang Shao,Ruiping Liu,Chang-An Wang
All solid-state lithium metal batteries are viewed as a potential next-generation energy storage technology due to their high energy density and better safety performance. The study on solid-state electrolytes (SSE) is of crucial importance for the development of technology in this field. Here, we develop a solvent-free preparation and matrix modification process for all-solid-state composite electrolytes (CSEs) based on the blended PVDF-HFP/PEO polymer matrix, and systematically study the effects of the solvent-free process on their properties. The results show that the solvent-free PVDF-HFP/PEO/10 wt % LLZTO solid-state electrolytes (1:1 mass ratio blended polymer matrix) combine the electrochemical and mechanical advantages of both polymers, thus-prepared electrolytes perform excellent tensile strength and ductility (over 500% strain for polymer matrix as well as 170% strain and 4.78 MPa strength for CSEs), and the ionic conductivity can reach ∼6.2 × 10–4 S·cm–1 at 80 °C. At the same time, the electrochemical stability and cycle stability of the electrolytes are enhanced due to the optimized process. The discoloration reaction of PVDF-HFP in composite electrolytes is further studied in this work as well. In addition to excellent performance, the simple process based on the solvent-free method also lays the foundation for scale-up production.
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高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Shuru Wu,Chengyu Wang,Shuanghui Li,Liming Lin,Qingsong Tong,Mengqi Zhu,Jingzheng Weng
Uneven lithium plating and low ionic conductivity currently impede the realization of high-capacity rechargeable lithium metal batteries. And the conventional poly(ethylene oxide) (PEO) solid-state electrolytes are unsuitable for high-energy-density Li anode applications due to their low lithium-ion transference number and high reactivity with Li metal, leading to detrimental dendrite formation and potentially hazardous exothermic reactions with the electrolyte. In this study, we employ a supramolecular approach to develop a novel polymer solid-state electrolyte based on poly(vinylidene fluoride) (PVDF) and a novel triblock polymer nanomicrosphere, (poly(ε-caprolactone)-poly(ethylene glycol)-poly(ε-caprolactone), (PCL-PEG-PCL). The abundance of carbonyl and ether-oxygen functional groups in PCL-PEG-PCL enhances the lithium coordination environment within the polymer solid-state electrolyte. Additionally, the original C–F moieties of PVDF form hydrogen bonds with C–H and terminal hydroxyl groups in PCL-PEG-PCL, collectively creating a multichannel fast Li+-conducting supramolecular cross-linked network. The resulting electrolyte demonstrates a high ionic conductivity of 1.4 × 10–3 S cm–1 and an extended electrochemical window of 5.2 V. Moreover, the electrolyte exhibits a high lithium-ion transference number (tLi+ = 0.63) at room temperature and exhibits excellent interfacial compatibility with the lithium metal anode. For the resulting electrolyte utilized in LiFePO4 batteries, the capacity retention of the cells assembled with this electrolyte exceeds 91.3% after 1000 cycles at 25 °C and 2 C (0.281 mA cm–2).
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DOI
高影响因子
Journal of Energy Storage
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2024
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IF 8.9
Wenjie Yuan,Jinlong Liao,Songde Huang,Dakun Song,Qinting Su,Cuihua Li,Jinhua He
Solid lithium metal batteries with solid polymer electrolytes have advantages in terms of high energy density and safety. However, their application is still hindered by unstable solid electrolyte interfaces (SEI and CEI) and uncontrolled dendrite growth. Here, a composite skeleton loaded with dielectric filler yttrium stabilized zirconia nanoparticles (YSZ) on the surface of PVDF-HFP nanofiber filaments is designed, and a novel composite solid electrolyte (CSE) is prepared by in-situ polymerization of DOL (1,3-dioxolane) on this framework to achieve safe and stable high-voltage lithium metal battery (LMB). The dual stable electrode interfaces (CEI and SEI) constructed by in-situ can effectively suppress the generation of lithium dendrites and suppress the degradation of the high-voltage NCM811 positive electrode structure and the generation of cracks in NCM811 particles, endowing the battery with extraordinary performance. The as-obtained CSE exhibits high ionic conductivity of 1.01 × 10 −3 S cm −1 at 30 °C, the enlarged electrochemical window of 6.0 V, and the Li + transference number is 0.72. The assembled Li|NCM811 battery is capable of stable cycling for 400 cycles at a cut-off voltage of 4.5 V and current density of 1C, with a capacity decay of only 0.074 % per cycle. .
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高影响因子
POLYMER
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2023
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IF 4.6
Ying Wei,Wei Chen,Xinyi Ge,Jiayi Liang,Zheng Xing,Qingguo Zhang,Zhong-Xia Wang
Ionogel electrolytes (IGEs) with chemical and thermal stability properties have attracted considerable attention for all-solid-state energy storage devices, particularly for high-performance supercapacitors (SCs). However, achieving high conductivity, flexibility, and toughness, as well as deformation and impact resistance in special cases, is challenging with the typical polymer based on ionic liquids (ILs). Here, an effective gelation strategy is proposed for the preparation of free-standing LiTFSI/[EMIM][TFSI]/PVDF-HFP ionogels (IGs) by double-additive induced physical cross-linking. The mechanical and electrochemical properties of the IGs can be synergistically optimized by the cross-linking and entanglement of LiTFSI and [EMIM][TFSI] with the PVDF-HFP network. The target IGs simultaneously exhibit excellent deformation capacity (over 50 %), high ionic conductivity (10.3 × 10 −3 S cm −1 at 25 °C), hardness (H: 728.6 kPa), and Young's modulus (E: 11.4 MPa), which can exhibit the specific capacitance of 274. 55 F g −1 , energy density of 38.13 Wh kg −1 and maximum power density of 2499.93 W kg −1 in the fabricated symmetric supercapacitor . The results will motivate us to further explore their applications for flexible electronic devices, wearable electronic skin, and flexible energy storage.
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高影响因子
APPLIED THERMAL ENGINEERING
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2025
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IF 6.9
Zhong-xuan Han,Hao Liu,Zhan-jun Yang,Yi Wu,Lin-xuan Zhu,Shu-na Zhao,Mi Li,Lin Jiang,Andrei Rotaru,Qiang Xu
Electrospray deposition was used to create concentric polyvinylidene fluoride/tungsten oxide (PVDF/WO₃) shells on aluminum (Al) powders spanning two size regimes (nano-Al, ≈ 87 nm; micro-Al, ≈ 20 μm). Transmission-electron microscopy shows that nano-Al acquires a uniform 5.5 nm-thick polymer/oxide coating, whereas micro-Al develops a discontinuous fibrous layer several hundred nanometers thick. These contrasting morphologies govern the energetic response. By comparing nano- and micro-scale Al cores and contrasting electrosprayed and ball-milled composites, the study elucidates how shell morphology governs the transient thermal processes of laser ignition, heat release and flame development. In laser-ignition tests, the nano-Al electrosprayed composite (NC) exhibited the shortest ignition delay of 42 ± 3 ms and reached a peak flame temperature of 2500–2700 °C, producing a narrow, self-sustaining jet; the corresponding ball-milled sample (NM) showed an ignition delay of 85 ± 5 ms and peaked at ~1500 °C, while the micro-Al electrosprayed material (MC) had an ignition delay of 156 ± 8 ms, plateaued at ~1107 °C, and failed to maintain combustion. The ball-milled micro-Al sample (BM) could not be ignited under the same conditions. Differential-scanning-calorimetry combined with Kissinger analysis revealed markedly different apparent activation energies for the first exothermal process (NC: 171 kJ/mol; NM: 63 kJ/mol; MC: 91 kJ/mol; ball-milled micro-Al, MM: 21 kJ/mol), underscoring the sensitivity of the initial Al–WO₃ reaction to coating continuity and diffusion distance. Overall, electrospraying reduces ignition delay by approximately 50 % compared to ball-milled samples, intensifies heat release, and maximizes flame temperature when the aluminum core is in the nano-scale regime. The resulting activation energies, ignition delays, flame speeds and peak temperatures provide thermal-design data for high-temperature heat-source layers in micro-thrusters, gas generators and other compact thermal-engineering devices, in addition to advanced propulsion or pyrotechnic applications.
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高影响因子
Analytical Methods
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2026
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IF 3
Xinwen Hu,Yong Zhang,Zhihao Chen,Mengqian Xiao,Litao Wang,Guihua Gao
In this study, the spray phase inversion method was employed for the first time to prepare MIL-68@Fe3O4@PVDF. The preparation process involved dispersing Fe3O4 in a PVDF/DMF solution; when the Fe3O4-loaded PVDF solution was atomized and sprayed into ethanol containing dispersed MIL-68, PVDF underwent phase inversion to form magnetic solid microspheres, with MIL-68 simultaneously immobilized on their surface. The procedure is facile, convenient, and suitable for the synthesis of various magnetic composites. The MIL-68@Fe3O4@PVDF composite exhibited favorable adsorption performance toward methylene blue (MB). The adsorption kinetics and isotherm data were well fitted to the pseudo-second-order kinetic model and the Langmuir isotherm model, respectively, indicating monolayer chemisorption on homogeneous adsorption sites. Based on this, a magnetic solid-phase extraction (MSPE) method coupled with high-performance liquid chromatography (HPLC) was established using MIL-68@Fe3O4@PVDF as the adsorbent for the determination of five parabens and bisphenol A (BPA) in water samples. After optimizing the MSPE conditions, the established method showed a good linear relationship for parabens and BPA in the concentration range of 1.5–400.0 ng mL−1 (r > 0.9996). It also achieved low limits of detection (LODs, 0.4–1.0 ng mL−1) and limits of quantitation (LOQs, 1.3–4.0 ng mL−1), along with high spiked recoveries (80.0–107.3%) and acceptable precision (RSD ≤ 8.81%). In conclusion, the spray phase inversion method provides a simple and efficient strategy for fabricating magnetic composites. Furthermore, it offers a novel approach to improve the application efficiency of nano-adsorbents in MSPE, laying a foundation for their broader use in the trace analysis of complex samples.
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Chao Xie,Pengyu Zhang,Yi Hu,Dandan Yang,Yahui Li,Yulian Li,Jiandong Lu,Zijian Wu,Junyong He,Peidong Hong,Lingtao Kong
Engineering a catalytic and hydrophilic membrane integrated system holds significant environmental implications for fouling-resistant and efficient water purification. The heterojunction Cu 2 O/Ti 3 C 2 T x was successfully synthesized by leveraging the specific interactions between the terminal active groups of MXene and Cu 2 O, effectively addressing the limitations of the catalytic membrane’s performance due to low-dose doping, and enhancing its catalytic activity and hydrophilicity. Here we report a ultra-low Cu(I) loading that achieves ultra-high fouling-resistance and decontamination performance in a self-cleaning Cu 2 O/Ti 3 C 2 T x @PVDF catalytic membrane integrated system. The representative membrane incorporating 1.0 wt% of Cu 2 O/Ti 3 C 2 T x (denoted as M-1.0) as a PMS activator demonstrated the successful performance of long-lasting antifouling and sustainable decontamination across a wide pH range in complex water matrices. The intrinsic Cu(I)/Cu(II) redox cycles was found to be crucial for driving PMS activation and oxidative conversion. Moreover, the Cu 2 O/Ti 3 C 2 T x -functionalized membrane demonstrated enhanced hydrophilicity and fouling-resistance compared to the pristine PVDF membrane. We further investigate the transformation and ecotoxicity of tetrabromobisphenol A and its intermediates within the M-1.0/PMS membrane system, providing valuable insights into the evolutionary dynamics of TBBPA. This work offers innovative perspectives for advancing environmental purification, membrane self-cleaning, and resources utilization technologies.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Zhiqiang Fang,Ming Zhao,Yan Peng,Shiyou Guan
Solid-state electrolytes can guarantee the safe operation of high-energy density lithium metal batteries (LMBs). However, major challenges still persist with LMBs due to the use of solid electrolytes, that is, poor ionic conductivity and poor compatibility at the electrolyte/electrode interface, which reduces the operational stability of solid-state LMBs. Herein, a novel fiber-network-reinforced composite polymer electrolyte (CPE) was designed by combining an organic plastic salt (OPS) with a bicontinuous electrospun polyvinylidene fluoride-co-hexafluoropropylene (PVDF–HFP)/Li7La3Zr2O12 (LLZO) membrane. The presence of LLZO in the composite helps to promote the dissociation of FSI– from OPSs. Subsequently, the dissociated FSI– is then involved in the formation of a LiF-rich solid electrolyte interphase (SEI) layer on the lithium anode via a reductive decomposition reaction, which was affirmed by theoretical calculations and experimental results. Due to the LiF-rich SEI layer, the Li/Li symmetric cell was able to demonstrate a long cyclic life of over 2600 h at a current density of 0.1 mA cm–2. More importantly, the as-prepared CPE achieved a high ionic conductivity of 2.8 × 10–4 S cm–1 at 25 °C, and the Li/LiFePO4 cell based on the CPE exhibited a high discharge capacity and 83.3% capacity retention after 500 cycles at 1.0 C. Thus, the strategy proposed in this work can inspire the future development of highly conductive solid electrolytes and compatible interface designs toward high-energy density solid-state LMBs.
研究领域:
材料科学
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储能
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电化学
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电池技术
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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
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IF 5.9
Chao Gao,Xinping Li,Guijuan Wei,Shoujuan Wang,Xixia Zhao,Fangong Kong
Solid polymer electrolytes (SPEs) have sparked attention due to their superior mechanical robustness and excellent security in solid-state lithium batteries. However, intrinsic limitations, such as poor ionic transport properties and large interface impedance, severely hinder their practical applications. Herein, a novel composite solid electrolyte (PLHL-CSE) membrane, which consists of poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), hydroxypropyl methyl cellulose (HPMC), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO), was prepared by solution-casting technique. The incorporation of HPMC into PVDF-HFP-based electrolyte played crucial roles in reducing the crystallinity of PVDF-HFP, promoting the dissociation of lithium salt, and increasing the amount of mobile Li + . With synergistic effects of HPMC and LLZTO, the mechanical and electrochemical performance of PVDF-HFP-based electrolytes were greatly enhanced. The obtained PLHL-CSE membrane showed better mechanical strength (3.0 MPa), enhanced ionic conductivity (0.25 mS/cm at 25 °C), greater lithium-ion transference number (0.7), and broadened electrochemical window of 5.0 V (vs. Li + /Li) than the PVDF-HFP/LiTFSI solid polymer electrolyte (PL-SPE) membrane. After 300 cycles at 1 C, the assembled LiFePO 4 /PLHL-CSE/Li cell with PLHL-CSE membrane as the hybrid composite solid electrolyte displayed a high capacity retention (95.6%). In addition, the positive effects of HPMC and LLZTO on promoting the generation of stable SEI and the uniform lithium deposition were also confirmed by the SEM results of cycled lithium metals. These findings point to the good potential of PLHL-CSE membrane as a hybrid composite solid electrolyte for practical application in lithium batteries.
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高影响因子
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