ACS Applied Energy Materials
·
2022
·
IF 6.959
Xuan Xie,Junyuan Tian,Xiaodan Cao,Xuexin Li,Jinxi Zhang,Zhiwei Wang,Kailiang Ren
With the rapid development of electric vehicles, power electronics, and medical devices, high-energy-density capacitors have attracted considerable research and engineering attention. In this investigation, we added surface-coated BNT-NN ((Bi0.5Na0.5)TiO3–NaNbO3) nanoparticles into the poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) matrix to fabricate BNT-NN/PVDF-HFP nanocomposites. We found that the composite with ultralow contents of BNT-NN (0.5 wt %) exhibited an ultrahigh energy density of 36.94 J cm–3 at 800 mV m–1, which is 17.5% higher than that of the pristine PVDF-HFP film. However, as the content of BNT-NN nanoparticles increased to 1%, the energy density decreased by 10.9% to 32.9 J cm–3 at 750 mV m–1. Compared with other PVDF-based nanocomposite films reported previously, this work shows a much higher energy density. This may be attributed to the largely increasing dielectric constant at the interface between the nanoparticles and their surrounding substrate, especially for the nanocomposite with a low volume content. The calculated dielectric constant from the theoretical model considering interface parameters fits well with the experimental data, indicating that the composites possess Kmax at ultralow nanoparticle contents. Therefore, the ultralow nanoparticle-added nanocomposites show great promise for ultrahigh-energy-density capacitor applications.
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Kaixiang Shen,Qinyu He,Qiang Ru,Danling Tang,Than Zaw Oo,Mono Zaw,Nyein Wint Lwin,Su Htike Aung,Swee Ching Tan,Fuming Chen
The lithium resources in seawater are more abundant than that on land, which is expected to meet the growing demand for the energy storage device like the lithium batteries . The electrochemical method is regarded as the most potential application. However, this method relies on membranes with advanced lithium-ion selectivity, and the emergence of super ionic conductor is expected to solve this problem. Herein, we employed polymer poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) as the flexible framework and Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) as the lithium ion conductor to prepare a flexible LATP/PVDF-HFP composite membrane (FLCM). Optimized FLCM has high lithium-ion selectivity and can be enriched up to 5.525 ppm Li + in diluted seawater (lithium extraction rate: 4.777 × 10 −3 mol/(m 2 h)), which is 48.465 times that of commercial cation-exchange membrane (CEM). In addition, the FLCM exhibits excellent equilibrium selectivity for Li + over Ca 2+ and Mg 2+ . The selectivity of Li + /Ca 2+ and Li + /Mg 2+ is up to 8424.706, 853.395, respectively. In an electrocatalytic-driven Li-ion extraction device with four recycle chambers at 2 V voltage, the concentration of Mg 2+ and Ca 2+ in the catholyte can be reduced to 0.744% and 1.249% of the seawater concentration, respectively. The work will be significant to solve the challenges of lithium extraction from seawater.
研究领域:
材料科学
·
电化学
·
环境工程
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 3
·2708-2719
·
IF 2.22
Li Jian,Hu Rong,Zhou Hongming,Tao Shengdong,Wang Ya
Polymer electrolytes have attracted widespread attention owing to their low cost and excellent processability. However, polymer electrolytes have yet been widely applied in commercial batteries due to their own drawbacks, such as weak mechanical properties and lower ionic conductivity. In this paper, poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) was blended with polyethylene oxide (PEO) and polymethyl methacrylate (PMMA) to build a novel polymer matrix, and SiO 2 @PMMA was doped into blended polymer matrix to form a composite polymer electrolyte named CPE-(SiO 2 @PMMA). The CPE-(SiO 2 @PMMA) performs superior electrochemical performance, such as a favorable electrochemical stability window (4.7 V vs Li/Li + ), decent ionic conductivity (8.54 × 10 –5 S cm −1 at 60 ℃), and excellent interface stability. The lithium metal battery LiNi 0.8 Co 0.1 Mn 0.1 O 2 /CPE/Li was fabricated to build a high specific energy system, which performs excellent cycling and C-rate performance compared to others polymer electrolytes. Capacity retention of LiNi 0.8 Co 0.1 Mn 0.1 O 2 /Li cell with CPE-(SiO 2 @PMMA) achieves 81.6% after 100 cycles, while CPE was broken with 100 cycles unfinished. All of the above favorable properties proved that PVDF-HFP/PMMA/PEO polymer matrix with SiO 2 @PMMA doped is a promising electrolyte candidate for flexible lithium metal batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Materials
·
2026
·Vol. 19
·期 7
·1364
·
IF 3.7
Liangliang Wu,Lili Liu,Fengchao Li,Qiang Li,Lingqi Wu
Electrochromic devices have emerged as promising candidates for non-emissive displays due to their particular photoelectric performance in complex lighting environments. They exhibit considerable potential in emerging fields such as Internet of Things terminals, flexible wearables and human–computer interaction interfaces. In this study, we developed a low-power electrochromic display based on a Pt/FTO (Fluorine doped tin oxide) electrocatalytic counter electrode and a Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) porous gel electrolyte. The Pt catalyst enhances Br−/Br3−redox reactivity, which reduces the driving voltage from 2 V to 1 V, and accelerates the electrode reaction kinetics. It is systematically explained by the Density Functional Theory (DFT) calculations and electrochemical characterization. Furthermore, we demonstrate a proof-of-concept multicolor display incorporating the electrocatalytic counter electrode with various viologen derivatives. This approach provides a significant advancement toward next-generation high-performance displays and is supportive of the development of energy-efficient optoelectronic devices.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tingting Cao,Liping Lin,Yanan Li,Wangshu Tong
Piezoelectric molybdenum disulfide (MoS 2 ) has emerged as a promising candidate for peroxymonosulfate (PMS) activation in advanced oxidation processes (AOPs), yet the mechanistic role of its piezoelectric field, particularly regarding the electron transfer process, is not fully understood. Herein, we construct a MoS 2 /PVDF-HFP (MP) piezoelectric composite film stimulated by ultrasound to elucidate the piezoelectric field's enhancement effect on PMS activation for singlet oxygen ( 1 O 2 ) generation. Notably, the ultrasound-induced piezoelectric field enhanced 1 O 2 production by 26-fold compared to the non-piezoelectric system, leading to significantly improved degradation efficiency (≈94 % within 60 min) of methylene blue (MB). Through a combination of experimental analysis and density functional theory (DFT) calculations, we demonstrate that the piezoelectric field enhances the adsorption of PMS onto the MoS 2 surface (evidenced by a change in adsorption energy from –0.33 eV to –0.42 eV) and facilitates interfacial electron transfer (with an increase of 0.04 e⁻ transferred per PMS molecule), thereby promoting the conversion of PMS to 1 O 2 . This work elucidates the enhancement mechanism of the electron transfer process in the MoS 2 -PMS system and provides a film-based strategy for designing efficient, ultrasound-driven piezoelectric AOPs targeting selective 1 O 2 generation.
研究领域:
环境科学
·
材料科学
·
化学工程
·
物理化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2021
·
IF 3.407
Wancheng Qin,Peng Zhou,Xinyu Xu,Muhammad Sultan Irshad,Yajun Qi,Tianjin Zhang
The inclusion of inorganic piezoelectric fillers in the polymeric matrix of flexible ferroelectric polymer synergies the piezoelectricity for wearable electronics . Herein, hierarchical Bi 3.15 Nd 0.85 Ti 3 O 12 microspheres (H-BNdT MPs) embedded in the polymeric matrix of polyvinylidene fluoride–hexafluoropropylene (PVDF-HFP) based piezoelectric thin films are fabricated by using a facile and cost-effective film-forming method, drop-casting. The composites possess improved dielectric and ferroelectric properties comparing with that of the pure PVDF-HFP film without any electrical poling treatment. More importantly, the highest outputs of an open-circuit voltage of 20 V and a short-circuit current of 1.9 μA under the repeated mechanical force of 10 N at the frequency of 2 Hz were successfully achieved. The maximum power of the optimal PEH can reach as high as 4.6 mW, corresponding to a power density of 938 μW/cm 2 , and the output electricity can light up 10 LEDs with a full-wave rectifier circuit. The enhanced output performance is attributed to the high local stress around the H-BNdT MPs arising from the hollow hierarchical architecture of the inorganic fillers . The lead-free flexible PEH is also proved to have the ability to harvest the biomechanical energy of human movements, such as finger pinching, finger tapping , and fist punching. In particular, a PEH shoe is made to harvest energy from walking and running. This PEH is confirmed to be a potential energy harvester and effective self-powered generator to drive wearable devices .
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Shuaijun Yu,Yazhen Jiang,Geting Xu,Hongyu Liu,Edison Huixiang Ang,Junbin Liao,Jiangnan Shen
In the context of industrial effluent management, the application of electrodialysis (ED) for the recovery of sulfuric acid has attracted significant interest. Despite the technological promise, the employment of traditional anion exchange membranes (AEMs) is frequently marred by substantial proton leakage, a pervasive issue that markedly degrades the effectiveness of acid recovery. To address this challenge, we embarked on a novel approach utilizing a polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP) substrate. This innovative method harnessed the inherent properties of fluorine-containing groups within PVDF-HFP to provide robust acid stability, while incorporating tertiary amine groups to minimize water uptake resulted in the creation of a proton-blocking AEM. A distinguishing feature of this AEM is its thermally cross-linked diene structure, which not only preserves acid concentration properties but also considerably reduces water migration. Moreover, our investigation undertakes an exhaustive examination of the recycling concentration and water transport within the acid recovery framework, alongside the intricate interplay with energy expenditure. This investigation could facilitate the adoption of industrial acid recovery methods utilizing AEMs designed for minimal water uptake and enhanced acid-blocking capabilities.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Shan Li,Shanshan Luo,Siyuan Liu,Man Yang,Xiaoqin Long,Guilin Li,Xuyan Cai,Shuhao Qin
Solid polymer electrolytes (SPEs) are considered promising candidates for next-generation lithium metal batteries due to their superior flexibility, processability, and electrode compatibility. However, the practical application of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)-based SPEs is hindered by high crystallinity, strong Li+ coordination with fluorine atoms, and unstable solid electrolyte interphase (SEI) formation. Herein, we propose a molecular-level modification strategy by incorporating polyvinylidene chloride (PVDC) as a structural analog into the PVDF-HFP matrix. PVDC exhibits excellent compatibility with PVDF-HFP due to their similar – CX2–CH2– chain structures, enabling uniform dispersion without phase separation. The modification mechanism operates through three synergistic effects: (1) steric hindrance from PVDC insertion disrupts ordered chain packing, reducing α-phase crystallinity and promoting β-phase formation; (2) the weak Lewis basicity of −Cl groups competitively coordinates with Li+, facilitating lithium salt dissociation; (3) −Cl participates in forming a LiCl–LiF composite SEI with enhanced ionic conductivity and mechanical stability. The optimized PH–PVDC-10% SPE delivers a high ionic conductivity of 7.07 × 10–4 S cm–1, a lithium-ion transference number of 0.62, and excellent interfacial stability, enabling Li||Li symmetric cells to cycle stably for over 3000 h. Furthermore, Li||LFP cells exhibit a capacity retention of 97.5% after 300 cycles at 0.5 C, while Li||NCM811 cells achieve 90.3% capacity retention after 100 cycles at 0.2 C. This work provides a simple, scalable, and effective strategy for designing high-performance SPEs toward practical solid-state lithium metal batteries.
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Huihui Gan,Jiajun Sun,Ye Xia,Pengyuan Qiu,Liang Li,Wen Zhu
Functionalized separator is more competitive than commercial polyolefin separator for rechargeable lithium-ion batteries. In this work, we design the separator modified by a composite coating layer, which is composed of Li6.75La3Zr1.75Ta0.25O12 (LLZTO), poly(ethylene oxide) (PEO), poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) and lithium bis(triuoromethanesulfonyl) imide (LiTFSI) (LLZTO-PEO/PVDF-HFP/LiTFSI, LLZTO-PPL). The LLZTO-PPL composite coating layer gives an impressive effect on dendrite inhibition of lithium metal. In comparison with commercial polyolefin separator, smaller overpotential value and better Coulombic efficiency are observed for the Li/LLZTO-PPL/Li symmetric cells and the Li/LLZTO-PPL/Cu asymmetric cells at various current densities of 0.2, 0.5, and 1 mA cm–2. Moreover, the LLZTO-PPL composite coating layer modified separator exhibits better high-rate capability and cycle performance for these cells assembled with different kinds of cathode materials (LiFePO4, LiCoO2, and LiNi0.8Co0.1Mn0.1O2) and their counterpart of a lithium metal anode. The functionalized composite coating layer modified separator may be a more attractive candidate material for commercial lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Yechen Wang,Hao Yu,Sufang Guo,Qi An
In this work, PVDF-HFP-based piezoelectric composite films incorporating MgO and rGO nanofillers were fabricated via a facile phase-separation method. The influences of filler composition and loading amount on their piezocatalytic and antibacterial performances were systematically investigated. MgO@rGO/PVDF-HFP film (4 wt % of MgO and 4 wt % of rGO) exhibited the best piezocatalytic activity, achieving rapid degradation on RhB, MO, and MB dyes with high efficiencies of 95.88%, 91.42%, and 98.15%, respectively. The dyes were not only decolorized but also further mineralized into inorganic carbon. The composite film also demonstrated excellent antibacterial performance, reaching 100% inhibition against E. coli and S. aureus upon ultrasonication. The superior catalytic behavior is attributed to the formation of the MgO@rGO heterojunction, which optimizes the energy band for the redox reaction, thereby promoting the generation of reactive oxygen species (ROS). Under ultrasonic excitation, the MgO@rGO/PVDF-HFP film produced substantially higher ·O2–, ·OH, and H2O2 levels than the other films, and ROS-trapping experiments confirmed ·OH and electrons as the primary active species. These enhancements arise from efficient charge transfer across the MgO@rGO interface and chemically induced polarization within the PVDF-HFP matrix, which together strengthen the piezoelectric response. This study demonstrates that constructing heterojunction nanofillers in flexible polymers is an effective strategy to enhance piezocatalysis for environmental purification and antimicrobial applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Qiyuan Zhu,Yuhang Yang,Jiling Song,Jiqiang Wu,Jianbing Guo
Developing functional separators capable of simultaneously suppressing lithium dendrite growth and enabling compatibility with high-voltage cathodes is critical for realizing long-cycle-life lithium metal batteries. Herein, a synergistic bulk–interface regulation strategy is achieved via a coatable Y3+/Zn2+ codoped LATP/PVDF-HFP composite coating applied onto a commercial polypropylene (PP) separator. Y3+/Zn2+ codoped Li1.3Al0.275Y0.025Ti1.7(PO4)3 (LAYTP-Zn) is synthesized via a solid-state route and uniformly integrated with PVDF-HFP to form a conformal coating with strong interfacial adhesion. Y3+/Zn2+ incorporation induces lattice expansion of LATP, thereby broadening bulk Li+ transport pathways. In addition, Zn2+ regulates interfacial chemistry by enhancing electrolyte dissociation and anchoring anions through Lewis acid interactions, while also promoting the formation of polar β-phase PVDF-HFP, collectively increasing the Li+ transference number to 0.79. In addition, the polymer matrix serves as a physical barrier that mitigates direct interfacial side reactions. The coordinated regulation of bulk ion conduction and interfacial ion distribution enables a more uniform Li+ flux and facilitates the formation of a LiF-enriched and mechanically robust interphase, thereby suppressing dendrite nucleation and growth. As a result, Li||Li symmetric cells exhibit stable cycling for over 3000 h at 1 mA·cm–2 and 1 mAh·cm–2. Furthermore, Li||LFP and Li||NCM811 half-cells deliver capacity retentions of 91.2% after 800 cycles at 1 C and 95.1% after 200 cycles at 0.5 C, respectively, while maintaining stable operation up to 4.73 V. This work provides a scalable separator design that integrates bulk transport optimization with interfacial regulation, offering a practical pathway toward high-performance lithium metal batteries.
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 102
·100079-100089
·
IF 3.289
Kaiyue Zhang,Zijian Cui,Guangyu Xing,Yaqing Feng,Shuxian Meng
Dye-sensitized solar cells (DSSCs) fabricated with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) composite gel electrolytes containing variable amounts of modified kaolin were studied in this work. The kaolin was modified with silane coupling agent γ-aminopropyltriethoxysilane (KH550), and the modified kaolin (M-KL) was characterized by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). The results of X-ray diffraction (XRD) and differential scanning calorimetry (DSC) indicated that the crystallinity of polymer membranes decreased with the addition of M-KL nanoparticles. The ionic conductivity and diffusion coefficient (I3−) of polymer gel electrolytes (PGEs) reached optimum values of 9.452 × 10−3 S cm−1 and 10.37 × 10−6 cm2 s−1 for 3 wt% M-KL, respectively, which contributed to higher short-circuit current density (Jsc) and photoelectric conversion efficiency (η) of the corresponding DSSCs. The optimum level of η reached 7.48% under the illumination of 100 mW cm−2, an increase of 16.3% compared with the DSSC without M-KL.
研究领域:
材料科学
·
能源技术
✓ 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）