ChemistrySelect
·
2025
·Vol. 10
·期 29
·e02906
·
IF 2
Haojun Zhang,Gengrui Zhao,Shaoting Ma,Bin Zhang
Graphical A novel method enhances triboelectric nanogenerator (TENG) output by using La-doped bismuth ferrite nanoparticles as the triboelectric layer filler. Under the filler concentration threshold, the output performance of the TENG with 1.5 wt% La-doped BFO fillers is significantly enhanced compared to that with undoped BFO fillers. Additionally, a self-powered anticorrosion system is developed using this TENG as the energy source. Incorporating high-permittivity nanoparticles as fillers into triboelectric layers is an effective strategy to enhance the output performance of triboelectric nanogenerators (TENG). However, exceeding the critical filler concentration threshold causes nanoparticle aggregation, limiting further output performance enhancement of TENG. Here, a novel approach is proposed to enhance TENG output performance by doping lanthanum (La) into bismuth ferrite (BFO), forming La-doped BFO nanoparticle fillers (BLFO) to further improve the output performance of polyvinylidene fluoride (PVDF)-based TENG without increasing filler concentration. This approach overcomes the limitation of nanoparticle aggregation at high filler loadings while significantly enhancing the output performance of TENG. Below the critical concentration threshold, the dielectric constant of BLFO/PVDF composites increases by 32% compared to undoped BFO/PVDF composites. Consequently, the BLFO/PVDF-based TENG achieves a high output voltage of 329 V and short circuit current of 44 µA, representing 43% and 69% increases over the BFO/PVDF-based TENG, respectively. Notably, these values represent 219% and 193% increases compared to the pure PVDF-based TENG. Furthermore, a self-powered anticorrosion system powered by the BLFO/PVDF TENG demonstrates effective metal protection, as evidenced by open-circuit potential measurements and reduced average corrosion rates.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Lingjie Luo,Han Lin,Rui Wu,Zengyao Zhang,Qiyun Li,Yuxuan Liu,Jun Liu,Renzong Hu,Min Zhu
Poly(vinylidene fluoride) (PVDF)-based polymer electrolytes are a focal point in solid-state batteries due to their exceptional ionic conductivity. However, the critical role of residual solvent in ion transport mechanism remains a long-standing debate. Addressing this critical issue, this work, for the first time, elucidates a percolation mechanism for ion transport in PVDF-based electrolytes dependent on residual solvent content. Key to this mechanism, a critical ~7 wt% N, N-dimethylformamide (DMF) content triggers a two-orders-of-magnitude ionic conductivity leap in PVDF-LiTFSI electrolytes from ~10-6 S cm-1 to ~10-4 S cm-1 at 30 °C. Multi-scale molecular dynamics simulations reveal this transition is not due to local Li-ion solvation changes, but rather the establishment of a long-range, continuous transport pathway as the "free-state" Li-ion conductive network reaches its percolation threshold. This work provides crucial insights into the conduction mechanism of PVDF-based electrolytes and contributes a novel conceptual framework with valuable design principles for optimizing macroscopic ion transport in polymer-small molecule composite systems via precise microstructural control. These findings pave the way for the development of high-performance, safer next-generation solid-state batteries.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jingcheng Wu,Yi He,Peng Zhou,Shuangshuang Li,Shuting Tian
Bioinspired multifunctional polyphenols coatings have been widely applied in the field of oily sewage treatment. However, shortcomings, such as lengthy reaction times and poor stability, hinder large-scale applications of these coatings. Herein, a tunicate-inspired polyphenol-mediated ultrafast biomimetic mineralization strategy was proposed to ingeniously integrate prominent oil resistance, excellent chemical stability, and satisfactory durability in combination with the construction of robust nanoarmors on polyvinylidene fluoride (PVDF) membranes. Poly-gallic acid (PGA) adhesive coatings and TiO 2 nanoparticles are uniformly integrated to construct nanoarmors via stable coordination interactions between titanium and carboxylate groups and the chelation of metal ions and polyphenols. The presence of nanoarmors not only reinforced the stability of the PGA adhesive coatings but also created a reliable oil-repellent barrier on the PVDF membrane surface with almost no oil adhesion (able to resist crude oil pollution). The innermost PGA adhesive coatings strongly adhered to the PVDF membrane substrates and functioned as a “primer” layer for biomimetic mineralization. The outermost TiO 2 nanoparticles can form a firm hydration layer, endowing the PVDF membranes with excellent oil resistance even under harsh corrosive environments (1 M HCl, 1 M NaOH, and 2 M NaCl). In addition to neutral emulsions, the as-prepared membrane can also separate oil-in-corrosive water emulsions, including salty, acidic (pH = 1), and alkaline (pH = 13) sewage, with a permeate flux higher than 3200 L m −2 h −1 bar −1 and an oil rejection ratio above 99.1 %. Therefore, tunicate-inspired PVDF membranes have broad application prospects in resource recycling and aquatic environment protection.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yuxin Zhou,Tianhuan Huang,Shaohua Zhong,Xiaoqing Li,Yiwen Chen,Kunyao Su,Weihuang Yang,Jiangrong Lu,Jian Zhang
Modified poly(vinylidene fluoride)-hexafluoropropylene (PVDF-HFP) exhibits excellent electrochemical stability and safety, making it one of the most promising gel polymer electrolytes (GPEs) for lithium metal batteries. To further optimize the performance of PVDF-HFP GPEs, N-formylmorpholine is used as a novel high-boiling nonsolvent for PVDF-HFP, and a uniform porous network rich in the β phase is prepared through a nonsolvent induced phase separation method. The optimized PVDF-HFP GPE (PNG10), enriched with the strongly polar β phase, can better promote the dissociation of lithium salts, while the uniform porous network provides the necessary conditions for the uniform distribution and conduction of ions, optimizing the electrode/electrolyte interface. As a result, the PNG10 GPEs achieves a simultaneous enhancement of ionic conductivity (1.32 × 10 −3 S cm −1 ) and lithium-ion transference number (0.82). Moreover, the Li|PNG10|LiFePO 4 cells demonstrate excellent long-term cycling stability and rate performance. The study highlights the importance of high-throughput porous network structures in the design of GPEs.
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高影响因子
POLYMER
·
2024
·
IF 4.1
Yongjing Fu,Huijia Wang,Chuan Zhou,Yiming Wang,Ni Li
Heat insulation and solar energy use are attractive strategies to cope with the serious and external cold environment. Here, silver nanowires (AgNWs) with high purity and aspect ratio were synthesized by polyol method and PVDF/AgNWs nanofiber membranes were prepared by electrostatic spinning. We investigated the warmth retention properties of nanofiber membranes using a heating table and simulated sunlight as the heat source, respectively. The results showed that the nanofiber membrane doped with 2 wt % AgNWs had a high porosity of 84% and thus a low thermal conductivity of 18 mW m −1 K −1 . Meanwhile the nanofiber membrane exhibited stable and long-lasting heat insulation behaviors and the surface temperature of the fiber membrane could reach nearly 43 °C after 5 min of irradiation with a 100 mW cm −2 light intensity and about 70 °C after 2 min of irradiation with a 300 mW cm −2 light intensity. In addition, the nanofiber membrane showed hydrophobicity with a water contact angle of 138° and breathability with air permeability of 75 mm s −1 . The stress and strain of the nanofiber membrane was 3.6 Mpa and 211.3% respectively.
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高影响因子
Sustainable Energy & Fuels
·
2025
·
IF 4.1
Chen Yang,Hongjian Zhang,Mingtao Zhu,Ping Li,Hao Wu,Qiushi Wang,Yong Zhang
Polyvinylidene fluoride (PVDF)-based electrolytes have attracted significant attention for their potential use in solid-state lithium batteries (SSLBs) due to their superior electrochemical performance and safety. However, their low ionic conductivity and uneven lithium deposition hinder the further application of PVDF-based electrolytes. Herein, this work focuses on incorporating Ba0.6Sr0.4TiO3 (BST) ferroelectric ceramics into PVDF to form composite solid-state electrolytes (CSEs). The BST ferroelectric ceramics can create an intrinsic electric field that facilitates lithium-ion transport and enables uniform Li deposition. In addition, benefiting from the high dielectric constant of BST and dipoles generated from the asymmetric structure, PVDF–BST CSEs achieve a high ionic conductivity (1.79 × 10−4 S cm−1) due to more free lithium ions, a wide electrochemical window of 4.8 V (vs. Li/Li+) and a high Li+ transference number (0.37). The assembled Li|PVDF–BST|Li symmetrical cells can steadily cycle for 1100 h at 0.1 mA cm−2 at 25 °C. The assembled Li|PVDF–BST|LiFePO4 cells show long-term cycling stability with a capacity retention of 85.6% after 100 cycles at 0.5C and a capacity retention of 81.4% after 200 cycles at 1C. This work provides a new strategy for improving the performance of the PVDF-based electrolytes by incorporating ferroelectric ceramics.
研究领域:
材料科学
·
能源存储与转换
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高影响因子
ACS Nano
·
2021
·
IF 15.881
Jiaqi Zheng,Zhaohan Yu,Yunming Wang,Yue Fu,Dan Chen,Huamin Zhou
The demand for flexible, efficient, and self-powered cochlear implants applied to remedy sensorineural hearing loss caused by dysfunctional hair cells remains urgent. Herein, we report an acoustic core–shell resonance harvester for the application of artificial cochleae based on the piezo-triboelectric effect. Integrating dispersed BaTiO3 particles as cores and porous PVDF-TrFE as shells, the acoustic harvest devices with ingenious core–shell structures exhibit outstanding piezo-triboelectric properties (Voc = 15.24 V, DAsc = 9.22 mA/m2). The acoustic harvest principle reveals that BaTiO3 nanocores resonate with sound waves and bounce against porous PVDF-TrFE microshells, thereby generating piezo-triboelectric signals. By experimental measurement and numerical modeling, the vibration process and resonance regulation of acoustic harvest devices were intensively investigated to regulate the influential parameters. Furthermore, the acoustic harvesters exhibit admirable feasibility and sensitivity for sound recording and show potential application for artificial cochlea.
研究领域:
生物医学工程
·
材料科学
·
听力学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yufei Wang,Zili Liu,Xingchuan Wei,Kuiliang Liu,Jiahai Wang,Jietao Hu,Jing Lin
Numerous strategies on the application of superwettable membranes for oil/water (O/W) separation have been proposed; however, few works on one-step separation strategies and the separation mechanism of complex O/W effluents containing organic dye and bacteria have been reported. Here, an integrated strategy for O/W separation, removal, and anti-oil/bacteria/dye-fouling is firstly proposed. A hydrogel fabricated PVDF@ZnO/Ag (H-PVDF@ZnO/Ag) membrane is designed with a superhydrophilic/underwater superoleophobic surface and hierarchical membrane channels, which exhibits superior separation efficiency (99.4%) and flux (1700 L m −2 h −1 bar −1 ). Considering the wettability, the interface intrusion pressure influences the O/W separation. Also considering the energy and molecular kinetics, the differences in the interaction energy and mean square displacement (MSD) of the water and oil molecules with the membrane obtained by molecular dynamics (MD) simulations are the internal factors influencing the O/W separation. The experimental and MD simulation results demonstrate that the high organic dye removal efficiency (>99%) is attributed to the synergistic effect between the hydrogel electrostatic adsorption and the ZnO/Ag photodegradation. The excellent anti-oil/dye/bacteria-fouling is due to the low oil adhesion, hydration layer, photodegradation, and antibacterial activity. Introducing an amino resin to the membrane increases the membrane’s tolerance and resistance to mechanical damage and chemical attack due to the intertwined cross-linking network and hydrogen bonds. The membrane also exhibits effective separation of real wastewater from jeans factory. This strategy may inspire further research on the treatment of complex O/W effluents.
研究领域:
材料科学
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环境工程
·
化学工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Minghui Niu,Chengwei Shan,Chenlong Xue,Xiaowei Xu,Aoyan Zhang,Yihong Xiao,Junyu Wei,Defeng Zou,Gina Jinna Chen,Aung Ko Ko Kyaw,Perry Ping Shum
The excellent photoelectric conversion efficiency and tunable bandgap of metal halide perovskites make them highly suitable for SERS applications. However, the low stability of perovskites in water and oxygen greatly hinders their use in SERS detection, particularly in biomolecule detection applications, which often require water-based test solutions. Herein, we report a gold (Au)/perovskite-polyvinylidene difluoride (PVDF) nanocomposite/ZnO nanoflower (GPPZ) SERS substrate capable of functioning in aqueous solutions. Its enhancement ability is attributed to plasmon-induced resonance energy transfer (PIRET) and an electromagnetic mechanism. The surface plasmon resonance created by ultrathin Au and ZnO nanoflowers induces resonance energy transfers to the perovskite via PIRET, facilitating a quasi-matched charge transfer between the perovskite and the probe molecule. The PVDF coating protects the perovskite from water and oxygen without affecting the resonance energy-transfer process. As a result, an enhancement factor (EF) approaching 1 × 106 was achieved for the crystal violet molecule. Additionally, we fabricated a flexible GPPZ substrate using silk screen printing, enabling mass production of an SERS array substrate. The printed flexible GPPZ substrates demonstrated micromole-level cysteine detection with an EF of 6.8 × 105, showing potential for application in hyperhomocysteinemia diagnosis.
研究领域:
材料科学
·
光学
·
生物医学检测
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2015
·
IF 5.056
Xinzhen Zhao,Huixia Xuan,Yongliang Chen,Chunju He
Polyvinylidene fluoride (PVDF) membranes with ordered and super hydrophilic surface were prepared though the self-assembly of anionic polyelectrolyte sodium alginate and amino functionalized SiO 2 nanoparticles , which were employed to tune the antifouling property of PVDF membrane though ordered and hydrophilic nanoscale surface. The assembly sites were introduced though the reaction between trimesoyl chloride and the reactive groups on plasma treated membrane surface. The physical and chemical properties of the membrane surface were closely related to the assembly number, since the assembled layer could effectively reduce the probability of absorption on membrane surface and entering membrane pores of pollutants to minimize the irreversible fouling at the maximum level. The modified PVDF membranes exhibited excellent hydrophilicity with obviously decreased surface contact angle, which distinctly enhanced the antifouling properties for humic acids and bovine serum albumin with secondary water flux recovery ratio (FRR) of nearly 100%. This paper aimed to provide an effective method to take the advantage of hydrophilic and ordered nanoscale surface to optimize the separation efficiency and antifouling performance of hydrophobic separation membrane .
研究领域:
材料科学
·
环境工程
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高影响因子
POLYMERS & POLYMER COMPOSITES
·
2015
·
IF 0.271
Zhao-Cai Zhang,Chun-Gang Guo,Jing-Lie Lv
Poly(vinylidene fluoride) (PVDF) membrane was successfully prepared by PVDF/tributyl citrate (TBC) via thermally induced phase separation (TIPS). TBC was used as diluent for membrane preparation, which is citric acid esters non-toxic, non-odorous, easy to prepare and comparatively cheap. The effects of PVDF content on crystallinity of PVDF and porous structure were investigated by differential scanning calorimetry (DSC), scanning electron microscopy (SEM), mercury porosimetry and pore size analyzer instrument. The results showed that PVDF was most able to crystallize and the membrane pore size became more uniform and smaller at higher polymer content.
研究领域:
材料科学
·
膜技术
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DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 7
·3269-3276
·
IF 2.961
Shi Tianze,Kang Shuai,Zhang Kun,Xue Fengjuan,Lu Wenqiang
Both reducing the liquid electrolyte and solid electrolyte have been acting as novelty strategy for commercial lithium-ion batteries avoiding safety problems such as fires and explosion which is mostly caused by the liquid organic electrolyte flammability. However, reducing the liquid electrolyte leads to capacity loss and energy fade of batteries. Here, we synthesized ultra-thin film of polyvinylidene fluoride (PVDF)-based gel polymer electrolyte (GPE), which also act as the separator, with trace amount electrolyte solution as a whole system to explore the optimized balance between safety and capacity of these new batteries. Both battery rate performance and cyclic stability are significantly improved when the thickness of the polymer electrolytes decrease to 20 μm. Furthermore, the batteries exhibit excellent cyclic stability when a minimum of 5 μl liquid electrolytes was added to the surface of the thin PVDF film (110.9 mAh·g −1 with a capacity retention of 78.6% at 0.5C after 150 cycles). It should be noted that the maximum discharge-specific capacity and discharge-specific capacity after 150 cycles of 5 μl-LFP/GPE-20/GC cell is 1.29 and 1.44 times larger than that of commercial cells. All the experiment results above might provide an optimization technical route and process for real applications in future lithium-ion batteries.
研究领域:
材料科学
·
能源技术
·
电化学
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高影响因子
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