ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Erwei Tan,Wenjie Peng,Qihou Li,Ding Wang,Xinhai Li,Jianguo Duan,Huajun Guo,Guochun Yan,Jiexi Wang,Zhixing Wang
Polyethylene oxide (PEO)-based electrolytes are considered to be promising for all-solid-state battery, benefiting from the superior flexibility, excellent processability and well compatibility. However, the low ionic conductivity at room temperature and poor stability under high voltage limit their further application. Herein, ZIF-8@PVDF-HFP/PEO (PPZ) solid electrolyte was successfully prepared by facial electrospinning process. On one side, the cooperation of PVDF-HFP and ZIF-8 was benefit to decrease the crystallization degree of PEO and thus promoted the Li + transfer. Moreover, the in-situ formed LiF layer derived from the decomposition of PVDF-HFP protected the electrolyte from contacting directly with the electrode, contributing to a stable electrode/electrolyte interface. The results demonstrated that the electrochemical stability and mechanical property of PPZ electrolyte were significantly improved when compared to the bare PEO electrolyte. The tensile strength increased from 0.5 to 6.7 MPa and the Li + transference number enlarged from 0.17 to 0.48. More importantly, the assembled LCO(LiCoO 2 )||PPZ||Li all-solid-state battery delivered a discharge specific capacity of 144.7 mAh g -1 at 0.2 C, nearly 1.6 times than that of the LCO||PEO||Li (90.7 mAh g -1 ). Besides that, the retention maintained at 86.3 % even after 200 cycles, manifesting a long-term cycling stability. This work provides a new idea for the practical application of PEO under high voltage.
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Journal of Energy Chemistry
·
2020
·
IF 7.216
Jing Jie,Yulong Liu,Lina Cong,Bohao Zhang,Wei Lu,Xinming Zhang,Jun Liu,Haiming Xie,Liqun Sun
Poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) based gel polymer electrolytes are widely studied owing to their electrochemical stability and high dielectric constant. However, most gel polymer electrolytes show unsatisfied safety and interface compatibility due to excessive absorption of volatile and flammable liquid solvents. Herein, by using a safe solvent (N-methyl-2-pyrrolidone) with higher boiling (203 °C) and flash points (95 °C), we initiatively fabricate a flexible PVDF-HFP based gel polymer electrolyte . The obtained gel polymer electrolyte demonstrates a high ionic conductivity of 7.24 × 10 −4 S cm −1 , an electrochemical window of 5.2 V, and a high lithium transference number of 0.57. As a result, the synthesized polymer electrolyte exhibits a capacity retention of 70% after 500 cycles at 0.5 C, and a discharge capacity of 86 mAh g −1 even at a high current rate of 10 C for LiFePO 4 based Li metal batteries. Moreover, a stable Li plating/stripping for more than 500 h is achieved under 0.1 mAh at both room temperature and 70 °C. Our results indicate that the PVDF-HFP polymer electrolyte is promising for manufacturing safe and high-performance Li metal polymer batteries.
研究领域:
材料科学
·
电化学
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Materials
·
2021
·Vol. 14
·期 11
·2701
·
IF 3.623
Xin Guo,Shunchang Li,Fuhua Chen,Ying Chu,Xueying Wang,Weihua Wan,Lili Zhao,Yongping Zhu
Gel polymer electrolytes have the advantages of both a solid electrolyte and a liquid electrolyte. As a transitional product before which a solid electrolyte can be comprehensively used, gel polymer electrolytes are of great research value. They can reduce the risk of spontaneous combustion and explosion caused by leakage during the use of conventional liquid electrolytes. Poly(vinylidene-fluoride-co-hexafluoropropylene) (PVDF–HFP), a material with excellent performance, has been widely utilized in the preparation of gel polymer electrolytes. Here, PVDF–HFP-based gel polymer membranes with polyvinyl pyrrolidone (PVP) pores were prepared using a phase inversion method, and Octavinyl-polyhedral oligomeric silsesquioxane (OVAPOSS) was doped to improve its temperature resistance as well as its ionic conductivity, to enhance its safety and electrochemical performance. The final prepared polymer membrane had a porosity of 85.06% and still had a certain mechanical strength at 160 °C without any shrinkage. The gel polymer electrolyte prepared with this polymer membrane had an ionic conductivity of 1.62 × 10−3S·cm−1at 30 °C, as well as an electrochemical window of about 5.5 V. The LiCoO2-Li button half-cell prepared therefrom had a specific capacity of 141 mAh·g−1at a rate of 1C. The coulombic efficiency remained above 99% within 100 cycles and the capacity retention rate reached 99.5%, which reveals an excellent cycling stability.
研究领域:
材料科学
·
电化学
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DESALINATION
·
2024
·
IF 8.3
Shuaijun Yu,Yazhen Jiang,Geting Xu,Edison Huixiang Ang,Zhipeng Xu,Junbin Liao,Jiangnan Shen
In recent years, the electrodialysis (ED) technology has gained substantial attention for its role in recovering sulfuric acid from industrial wastewater. However, the typical anion exchange membranes (AEMs) have been known to exhibit notable proton leakage during ED, which can severely hinder the efficiency of acid concentration. To overcome this issue, we utilized a substrate made of poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP). This choice capitalizes on the presence of fluorine-containing groups for enhanced acid stability and tertiary amine groups to minimize water content, resulting in a significant improvement in proton-blocking capabilities of the AEMs. It is worth noting that, through a combination of partial cross-linking and quaternization, these AEMs not only maintain their acid concentration performance but also substantially reduce energy consumption. Additionally, we conducted a thorough analysis of the delicate balance between current efficiency and energy consumption in acid recovery systems. In contrast to conventional AEMs and commercially available proton-blocking membranes such as ACM, we highlight the exceptional acid concentration capability ( C H + = 1.28 M) and the low energy consumption (3.3 kWh/kg) of AEM-1.2. This research breakthrough marks a significant advancement in the development of acid-blocking AEMs and strongly advocates for more efficient sulfuric acid recovery from industrial wastewater.
研究领域:
环境科学
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材料科学
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高影响因子
ACS Omega
·
2026
·
IF 5.2
Ruifeng Wang,Huangxin Cheng,Jiangnan Li,Gengzhe Shen,Yu Li,Jingmei Lyu,Zhengjian Chen
Gel polymer electrolytes typically suffer from low ionic conductivity, limited oxidative stability, and thermal runaway. Nitrate additives can be beneficial, but they are limited by poor solubility. Herein, sandwich-structured ionic liquid gel electrolyte membranes were fabricated by incorporating a polyethylene (PE) interlayer between two poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF–HFP) layers loaded with LiTFSI and 1-ethyl-3-methylimidazolium nitrate ([EMIm]NO2). The PFENE3 membrane prepared with 22.9 wt % [EMIm]NO2 shows optimal overall performance. Specifically, the PE scaffold provides robust mechanical strength (36.7 MPa). The incorporation of [EMIm]NO2 induces multiple synergistic effects: (i) increasing ionic conductivity to 5.03 × 10–4 S cm–1 at 25 °C by suppressing PVDF–HFP crystallinity; (ii) achieving a high Li+ ion transference number (0.449) by confining other charge carriers within the TFSI-[EMIm]+-NO2 hydrogen-bonding network; and (iii) the sacrificial decomposition of NO2 to form robust protective interphases on both the anode and cathode. Consequently, Li/PFENE3/Li symmetric cells demonstrated stable cycling for over 600 h at 0.3 mA cm–2. Furthermore, the Li/PFENE3/NCM622 full cell delivered an initial capacity of 170.9 mAh g–1 at 0.1 C and 159.3 mAh g–1 at 0.5 C, with 78% retention after 100 cycles, significantly outperforming [EMIm]NO2-free systems. These findings provide a viable strategy for developing high-performance and safe Li-metal batteries.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yi Zhang,Yiyuan Peng,Xiangming Li,Hao Lu,Zequn Ma
Developing flexible, metal-free membranes for efficient piezo-photocatalytic environmental remediation remains a critical challenge. Herein, an all-organic, hierarchical porous COF/PVDF-HFP composite film was fabricated via a phase inversion method. Driven by strong interfacial hydrogen bonding, the COF nanoparticles (with an optimal loading of 5 wt%) served as efficient nucleating agents, significantly enhancing the electroactive β-phase content of the PVDF-HFP matrix and boosting its piezoelectric response. Under simultaneous light and ultrasonic excitation, the optimized composite achieved a remarkable Rhodamine B degradation efficiency of 97.73% within 180 min, exhibiting a kinetic rate 2.3 times higher than that of pristine PVDF-HFP. Furthermore, it demonstrated robust broad-spectrum antibacterial efficacy (>99% sterilization) against both E. coli and S. aureus . Crucially, by integrating density functional theory (DFT) calculations with absolute band alignments (UPS) and dynamic in-situ XPS tracing, we definitively unveiled an internal electric field-driven S-scheme heterojunction mechanism. This S-scheme pathway dynamically steers charge recombination, successfully retaining highly reductive photogenerated electrons on the COF to thermodynamically favor the dominant generation of superoxide radicals (·O 2 − ) and a remarkable yield of H 2 O 2 (937.6 µM). Exhibiting exceptional structural stability over multiple cycles, this entirely metal-free composite offers a robust, sustainable paradigm for engineering high-performance piezo-photocatalytic interfaces for water purification and hygiene protection.
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Nanoscale Horizons
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2026
·
IF 6.4
Jinjin Song,Haifan Tang,Junyun Zhang,Jiaxue Yu,Dailin Yuan,Yanqiu Zhang,Jinyang Wang,Di Pan,Weixu Tian,Jingye Jin,Jian Fang,Chenhong Lang
Respiratory acoustic signals provide a crucial insight for assessing respiratory system health and diagnosing related diseases. Flexible acoustic sensors hold promise for continuous, wearable monitoring but often face trade-offs between performance, comfort, and integration into daily textiles. Herein, we present an acoustic sensing fabric (ASF) woven from silver-plated nylon warps and PVDF-HFP nanofibrous core–shell wefts, which form piezoelectric/triboelectric units at yarn interlacing points to efficiently convert micro-amplitude vibrations into electrical signals. The optimized ASF exhibits a high output of up to 38.3 V at 170 Hz/118 dB, and shows notable sensitivity, reaching 15 mV Pa−1 at 1000 Hz/94 dB and even reaching 2.5 × 103 mV Pa−1 at 170 Hz/90–95 dB. Through systematic investigation of structural parameters, supported by laser Doppler vibrometry and finite element simulation, we elucidate how the fabric structure influences forced vibration and signal output. The ASF accurately records the directly produced respiratory sounds, the playback of pathological cardiopulmonary acoustics, and daily speech, demonstrating its capability for respiratory disease diagnosis. Moreover, it can be seamlessly integrated into common textiles using standard weaving processes. This work thus provides a practical, scalable platform for designing everyday wearable systems for applications such as respiratory monitoring, remote cardiopulmonary auscultation, and voice-assisted human–machine interfaces.
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chenghao Zhao,Wei Wei,Zhiyi Li,Zhijun Liu
Composite solid electrolytes (CSEs) are promising alternatives to liquid electrolytes in lithium-ion batteries (LIBs). CSEs offer superior electrochemical stability, safety, and mechanical integrity. Herein, a flexible CSE film comprising aluminium-doped Li 6.28 La 3 Zr 2 Al 0.24 O 12 (LLZO – Al) and poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF – HFP) is successfully fabricated via an optimised sol-gel synthesis and solution casting method. The LLZO – Al filler, with high cubic-phase purity, effectively reduces the crystallinity of the PVDF – HFP matrix, creating continuous Li + transport pathways. The optimised composite membrane containing 15 wt% LLZO – Al (CE15%) exhibits a high room-temperature ionic conductivity of 6.1 × 10 –4 S cm –1 and a broad electrochemical stability window up to 4.8 V vs. Li/Li + . Additionally, it demonstrates excellent mechanical flexibility (elongation at break: 162%) and enhanced thermal resistance. The Li/CE15%/Li symmetric cell maintains stable cycling for over 2000 h at 0.1 mA cm –2 , confirming outstanding interfacial stability. Furthermore, the LFP/CE15%/Li full cell delivers an initial discharge capacity of 166.1 mAh g –1 at 0.1 C and retains 86% of its capacity after 300 cycles. These results highlight the great potential of LLZO–Al/PVDF–HFP/LiTFSI composite electrolytes for high-performance solid-state Li-ion batteries.
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Nanoscale
·
2025
·
IF 5.1
Yuanxiang Xiao,Weishi Zheng,Jibiao Guan,Yingyao Chen,Runxin Chen,Yini Zhao,Shuangfei Xiang
Radiative cooling offers a sustainable thermal management strategy for personal cooling under extreme solar exposure. Herein, a surface-engineered radiative cooling fabric (PHB-4%) was developed utilizing a simple electrospinning technique. The PHB-4% strategically integrates two-dimensional boron nitride nanosheets (BNNS) with high refractive index as photon scattering centers within polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) nanofibers. Through synergistic optimization of hierarchical micro-nano porous architectures and BNNS-enhanced photon scattering, the engineered PHB-4% achieves 94 % solar reflectivity and 91.5 % mid-infrared (MIR) emissivity, enabling a sub-ambient cooling effect of 5 °C under 824.4 W·m⁻² solar irradiation. Remarkably, the PHB fabric maintains 92 % reflectivity after extended ultraviolet exposure (60 days) and repeated laundering (100 cycles), outperforming conventional cooling textiles. The inherent hydrophobicity of PVDF-HFP further endows the PHB-4% with antifouling capabilities and contamination resistance. Besides, the evaluation of basic properties confirms preserved flexibility, adequate breathability, and sufficient mechanical durability for wearable applications. This multifunctional cooling textile platform establishes new possibilities for sustainable personal thermal regulation and energy-efficient outdoor thermal management systems.
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高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Huihui Gan,Jiajun Sun,Ye Xia,Pengyuan Qiu,Liang Li,Wen Zhu
A composite solid polymer electrolyte (CSPE) is the best candidate in all-solid-state lithium metal batteries because of its flexibility, high safety, wide electrochemical stability, relatively high ionic conductivity, and excellent compatibility with the lithium metal. In this work, the garnet-type Li6.75La3Zr1.75Ta0.25O12 (LLZTO) is introduced into a poly(ethylene oxide) (PEO)/poly(vinylidene fluoride–hexafluoropropylene) (PVDF–HFP)-based CSPE (PEO/PVDF–HFP/LLZTO CSPE). The PEO/PVDF–HFP/LLZTO CSPE possesses a high lithium-ion transference number of 0.47, a high ionic conductivity of 2.65 × 10–4 S cm–1, a wide electrochemical window of 5.55 V vs Li+/Li, and effective inhibition of lithium dendrite growth for 1000 h with a current density of 0.10 mA cm–2. Furthermore, the Li//LiFePO4 cell assembled with the PEO/PVDF–HFP/LLZTO CSPE delivers superior rate capability and good cycling stability. Therefore, the PEO/PVDF–HFP/LLZTO CSPE is a very promising candidate for high-performance all-solid-state lithium metal batteries.
研究领域:
材料科学
·
电化学
·
储能技术
·
高分子科学
·
锂电池
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Xiaoxue Liao,Wenxi Hu,Jiaqing Su,Sha Cheng,Cheng Huang,Shihan Hu,Zhuowei Wang,Xiao Chen,Chunxia Zhao,Pengchao Zhang
Developing gel polymer electrolytes (GPEs) is a promising strategy to mitigate safety concerns caused by the leakage of liquid electrolytes in lithium metal batteries (LMBs). However, fabricating a membrane with high thermal stability, whose derived GPE also maintains good electrochemical performance, remains a major challenge. Herein, we report a composite membrane, poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)/poly(m-phenylene isophthalamide) (PMIA), with excellent thermal stability and uniform nanoporous structure for high-performance GPE of LMBs. The PVDF-HFP/PMIA composite membrane, featuring a uniform pore size of 110 nm, is prepared by a double-sided solvent–nonsolvent exchange process via microfluidic technique. The incorporation of PMIA achieves the enhanced heat resistance of the composite membrane with a superior size retention of 86% after continuous heating at 250 °C for more than 360 min. The PVDF-HFP/PMIA GPEs-based Li||Li symmetric cells display stable voltage across various current densities and cycles for 600 h at 0.5 mA cm–2. Moreover, the morphology of the lithium anodes after 100 h shows uniform lithium deposition, demonstrating excellent suppression of lithium dendrite growth. The Li||LFP cells assembled with PVDF-HFP/PMIA-based GPEs deliver a high discharge capacity of 134.5 mAh g–1 at 5 C. The as-prepared heat-resistant GPEs membrane thus offers great potential for improving the safety performance of LMBs.
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高影响因子
Particuology
·
2024
·
IF 4.1
Sijia Wang,Liang He,Mengting Wang,Xingtong Guo,Xiangyun Qiu,Shoudong Xu,Petr Senin,Ting Bian,Tao Wei
For all-solid-state lithium batteries (ASSLBs), polymer-blended solid composite electrolytes (SCEs) have drawn wide interest owing to their significance in improving the interfacial solid-solid contacts and inhibiting the growth of lithium dendrites . In this work, SCEs based on PVDF-HFP/PMMA matrix containing MOFs (NH 2 -MIL-53(Al)) and LiTFSI were designed and synthesized employing an easy solution casting method. The synthesized samples were examined by XRD , SEM, EDS , and electrochemical tests. It was found that MPP-2 SCE not only has excellent ionic conductivity at 60 °C of 5.54 × 10 −4 S cm −1 , but also exhibits superior interfacial compatibility in Li||Li symmetric batteries , which can constantly cycle for about 800 h at 0.1 mA cm −2 with no short-circuiting. The assembled Li|MPP-2|LiFePO 4 cell exhibited a first discharge specific capacity of up to 157.1 mAh g −1 at 60 °C and 0.2 C. This work may help to further advance the progress of ASSLBs in the future.
研究领域:
材料科学
·
电化学
·
能源存储
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危险品化学品经营许可证（带存储）