POLYMER
·
2023
·
IF 4.6
Wei Chen,Zheng Xing,Ying Wei,Xinyuan Zhang,Qingguo Zhang
Gel-polymer electrolytes (GPEs) are of great interest to build high-performing rechargeable electrical double-layer capacitors (EDLCs) owing to the combination of good electrochemical properties and improved safety. Herein, we report a quasi-solid-state GPE for EDLCs from a mixture of the poly (vinylidene fluoride- co -hexafluoro propylene) (PVDF-HFP) and ionic liquid 1-ethyl-3-methylimidazole tetrafluoroborate ([EMIM][BF 4 ]), which avoids the leakage of liquid electrolyte and the low conductivity of common solid electrolyte . The intermolecular forces of GPE was characterized by in-situ infrared (IR) spectroscopy, and the interactions between ionic liquid and polymer were also analyzed. The prepared GPE was observed to be easily procurable, excellent transparency, high thermal safety (thermal stability up to 320 °C) and outstanding electrochemical properties at room temperature (wide electrochemical stability window of 3.91 V versus SS (SS being stainless steel foils) and high ionic conductivity of 6.9 × 10 −3 S cm −1 ). The specific capacitance, the maximum specific energy, and the maximum specific power of the fabricated symmetrical supercapacitor had been determined to be 161.8 F g −1 , 89.89 Wh kg −1 , and 8 kW kg −1 , respectively. Moreover, the EDLC shows extraordinary electrochemical behaviors and cyclic stability over up to 10 000 cycles at 25 °C with 86% capacitance retention under a current load of 2 A g −1 . The experimental results indicate the excellent potential of the [EMIM][BF 4 ] ionic-liquid-based gel polymer electrolyte for EDLCs.
研究领域:
电化学
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储能
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材料科学
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高分子科学
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超级电容器
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2021
·
IF 7.267
Juanxuan Guo,Fangxian Wang,Shihao Li,Yuwei Wang,Xueshan Hu,Daoyuan Zu,Yongming Shen,Changping Li
A solar-thermal utilization heat transfer fluid with excellent light-to-heat conversion performance and good thermal reliability at high temperature is highly desirable for direct absorption solar collector (DASC). To obtain IL-based nanofluids as suitable HTFs for medium-high temperature DASCs, GO , MWCN and Ti 3 C 2 were selected as nanoadditives , respectively. The result shows that the light-to-heat conversion efficiency of Ti 3 C 2 /[BMIM]BF 4 nanofluid is 20% and 29% higher than that of GO/[BMIM]BF 4 nanofluid and MWCN/[BMIM]BF 4 nanofluid, respectively, after irradiation for 1000 s, due to the excellent optical absorption performance of Ti 3 C 2 . Furthermore, the effects of mass fractions of Ti 3 C 2 , solar concentrations and DASCs heights on the light-to-heat conversion performances of Ti 3 C 2 /[BMIM]BF 4 nanofluids are investigated systematically. The light-to-heat conversion performances of Ti 3 C 2 /[BMIM]BF 4 nanofluids rapidly increase with the increase of mass ratios of Ti 3 C 2 owing to the outstanding broad-spectrum absorption properties (250–2100 nm) of Ti 3 C 2 . Moreover, the light-to-heat conversion performances of Ti 3 C 2 /[BMIM]BF 4 nanofluids in DASCs increase with the increase of solar concentrations and DASCs heights. Additionally, the light-to-heat conversion efficiency of 0.04 wt% Ti 3 C 2 /[BMIM]BF 4 nanofluid is 2.7 times that of the pure ionic liquid at solar concentration C = 2.5, DASCs height H = 2.5 cm and 6500 s of irradiation. The obtained high-performance Ti 3 C 2 /[BMIM]BF 4 nanofluids show great potential application as advanced heat transfer fluids (HTFs) for DASCs.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Qingguo Zhang,Sihan Feng,Xinyuan Zhang,Ying Wei
Two novel ionic-liquid-based binary mixture systems of N,N-diethyl-N-(2-methoxyethyl)- N -methylammonium tetrafluoroborate ([DEME][BF 4 ]), or N,N-diethyl- N -methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethylsulfonyl)imide ([DEME][TFSI]) + γ-butyrolactone (GBL) are prepared over the whole concentration range (mole fraction from 0–1). Some important thermodynamic properties and parameters of the pure ILs and two systems were measured and calculated. The temperature dependences of the transport properties (viscosity and conductivity) were described by the Vogel–Fulcher–Tamman (VFT) equation. The excess molar volumes ( V E ) were obtained from the experimental densities and fitted to Redlich–Kister (R–K) polynomial equation. The DSC analysis, the shifts of the infrared (IR) spectrum, and COSMO–RS methodology based on DFT calculations were combined to explain the interaction information of GBL molecules and cations/anions of the selected systems. The stable optimized structures, interaction energies, and charge distributions were further obtained. Those maybe slight enlighten the application of similar mixture systems in future.
研究领域:
化学
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材料科学
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产品关联
DOI
高影响因子
ACS Photonics
·
2025
·
IF 6.7
Yingming Wang,Lingyan Xu,Lu Liang,Zhentao Qin,Shuai Han,Chongqi Liu,Lixiang Lian,Wei Zheng,Yanyan Lei,Qinzeng Hu,Tao Wang,Wanqi Jie
Achieving real-time, high-sensitivity radiation detection with stability and precision remains a critical challenge in medical diagnostics and radiation therapy. Here, we report the development of MDABCO-NH4(BF4)3 single crystals (SCs), a metal-free perovskite material with exceptional performance for both X-ray and charged particle detection. Large-scale MDABCO-NH4(BF4)3 SCs (15 × 13 × 5 mm3) were synthesized via a simple low-temperature solution method, achieving superior crystallinity with a full width at half-maximum (fwhm) of 0.0061°. The MDABCO-NH4(BF4)3 detectors exhibit high resistivity (1.31 × 1012 Ω·cm), low trap density (1.09 × 109 cm–3), and excellent charge transport properties ((μτ)h = 3.15 × 10–5 cm2·V–1). For α-particle detection, the MDABCO-NH4(BF4)3 detectors achieve a high energy resolution of 35.0% at 5.49 MeV and a fast response time of 5 ms, demonstrating single-particle sensitivity. For X-ray detection, MDABCO-NH4(BF4)3 detectors exhibit high sensitivity (13,529 μC·Gyabs–1·cm–2) and an ultralow detection limit (17.1 nGyair·s–1), significantly lower than the 5.5 μGyair·s–1 standard for active personal dosimeters used in regular medical diagnostics. The combination of superior charge transport properties with stability and high signal-to-noise ratio establishes MDABCO-NH4(BF4)3 SCs as a versatile material for real-time radiation monitoring and high-precision medical imaging applications.
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Zhen Jiao,Mengnan Zhang,Lixia Yang,Yuxuan Wang,Jiajie Fu
To evaluate the feasibility of extraction of 1-methylimidazole from its low-concentration aqueous solution by ionic liquids, the liquid–liquid equilibrium of the ternary system of water + 1-methylimidazole + ionic liquid ([Hmim][PF6], [Omim][PF6], or [Omim][BF4]) was determined at 303.15 K and atmospheric pressure. The distribution coefficient and selectivity were calculated in accordance with the experimental results. The effects of the anion and cation of ionic liquids on the separation ability were discussed. The results indicated that the extraction capacity increased with increasing cationic carbon chain length, and the change of anions significantly affected the distribution coefficient and selectivity. As expected, the three ionic liquids were feasible as extractants for separating 1-methylimidazole from water. It also indicated that [Omim][PF6] was a more suitable extractant than [Hmim][PF6] and [Omim][BF4] for the extraction. The highest distribution coefficient and selectivity of [Omim][PF6] could reach 1.71 and 111.92, respectively, indicating [Omim][PF6] as a good choice for extracting 1-methylimidazole from water. In addition, the non-random two-liquid model was employed to successfully correlate the experimental data with a root-mean-square deviation of less than 0.0188. Moreover, a GUI-MATLAB tool was used to verify the consistency of the correlated parameters.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
Sustainable Chemistry and Pharmacy
·
2022
·
IF 5.464
Xianqiang Chen,Xinyu Chu,Xue Li,Fuliang Cao,Qirong Guo,Jiahong Wang
In this study, a novel method for extraction saponins from Xanthoceras sorbifolium Bunge leaves (XLs) was developed using ultrasonic-assisted ionic liquid combined with in situ alkaline aqueous biphasic systems (UAE-IL-AABS). UAE-IL was firstly used to extract saponins from XLs, followed by removal of the phenolic impurities using in situ IL-AABS. A Box-Behnken Design (BBD) was used to analyze the [C 4 MIM]BF 4 concentration, time, liquid/solid ratio, and power on the saponins yield. Under the optimal conditions with [C 4 MIM]BF 4 concentration 2.3 M, time 19.9 min, liquid/solid ratio 24.9:1 (mL/g), and power 165 W, the saponins yield was 8.17%, which was 11.01% higher than ultrasonic assisted ethanol extraction method. The major compounds in UAE-IL were also identified using UPLC-MS/MS. Moreover, the optimized conditions of IL-AABS with recovery rate of saponins was 96.70%. Finally, a low extraction time, and favorable impurities removal efficiency and recyclability suggested UAE-IL-AABS is greener for production in the food, medicine, and chemical industry.
研究领域:
化学工程
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药学
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食品科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL SCIENCES
·
2020
·Vol. 132
·期 1
·1-14
·
IF 1.406
Cheng Si Yuan,Yang Xi Nan,Tao Zhu,Wei Lian Tong,Zhao Wei Wei,Jiang Dao Fa,Jin Yan Mei,Gao Jie,Ma Pei Hua
Abstract The host–guest binding characteristics of cyclopentanocucurbit[6]uril (CyP 6 Q[6]) and cyanine dye trans -4-[4-(dimethylamino)styryl]-1-methylpyridinium iodide ( t -DSMI) have been studied. The results show that CyP 6 Q[6] and t -DSMI form a 1:1 inclusion system, generating strong fluorescence. On this basis, the fluorescent probe t -DSMI@CyP 6 Q[6] has been constructed, and its anion recognition ability has been investigated. In a neutral environment, BF 4 − , H 2 PO 4 − , and I − elicit obvious specific responses from the probe, since they have stronger binding forces. This probe shows greater sensitivity than the previously reported probe t -DSMI@HMeQ[6]. Graphic abstract Since the complex formed by CyP 6 Q[6] and t -DSMI can produce strong fluorescence at pH > 4.6, t -DSMI@CyP 6 Q[6] was constructed to recognize the anions at pH ≅ 5. The results show that in a near neutral environment, BF 4 − , H 2 PO 4 − , and I − elicit obvious specific responses from the probe.
研究领域:
分析化学
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材料科学
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化学传感器
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DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
·
IF 3.9
Xiangyang Liu,Longhui Fang,Jin Wang,Sihan Huang,An Li,Hui Liu,Zhuoyang Lu,Jiangang Long,Maogang He
R410A is a high GWP (2088) refrigerant blend soon to be eliminated, consisting of equal mass of difluoromethane (R32) and pentafluoroethane (R125). R32 is a good additive to the next generation refrigerant hydrofluoroolefin due to low GWP (675) and superior thermodynamic properties. But the separation of R32 and R125 by conventional distillation is a challenge because of their near boiling points. In this study, innovative membranes combining metal-organic framework (MOF) and ionic liquid (IL) are applied to the recovery of valuable R32 from R410A and demonstrate excellent R32/R125 separation performance. [C 2 mim][BF 4 ] was embedded into the nanocages of ZIF-8 through a impregnation strategy to prepare ZIF-8@[C 2 mim][BF 4 ]/Pebax mixed-matrix membranes (MMMs). Characterization results confirmed that IL was successfully added to the nanocages of ZIF-8. ZIF-8@[C 2 mim][BF 4 ]/Pebax MMMs with 10 wt% loading exhibits the best separation performance, increasing R32 permeability and R32/R125 selectivity by 177% and 150% compared to neat Pebax membrane. The ZIF-8 @ [C 2 mim][BF 4 ] material by impregnation has excellent performance in regulating the effective cage size of MOF, providing new strategies for designing more accurate and efficient MMMs.
研究领域:
材料科学
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环境工程
·
化学工程
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产品关联
DOI
高影响因子
Nature Electronics
·
2024
·Vol. 7
·期 6
·487-496
·
IF 33.7
Gao Yun,Li Hongjin,Dai Xingliang,Ying Xingjian,Liu Zhe,Qin JiaJun,Guo Jie,Han Zhongkang,Zhang Yujing,Zhu Meiyi,Wu Xiaohui,Cai Qiuting,Yang Yixing,Feng Linrun,Zhang Xiaoyu,Huang Jingyun,He Haiping,Gao Feng,Ye Zhizhen
Perovskite light-emitting diodes (PeLEDs) could be of use in the development of active-matrix displays. However, due to ion migration in crystal structure, PeLEDs have electroluminescence rise times over milliseconds, which is problematic for the development of high-refresh-rate displays. Here, we show that the electroluminescence rise time of PeLEDs can be reduced to microseconds using an individual-particle passivation strategy. The approach is based on BF 4 − ions that can passivate every nanocrystal in a perovskite emissive layer during film deposition. It leads to a defect-free film with discrete nanostructure and excellent crystallinity, which inhibits ion migration. Our strategy can be applied in perovskite nanocrystal films with different colours: red (635 nm), green (520 nm) and blue (475 nm). These PeLEDs all demonstrate response times within microseconds and high external quantum efficiencies of 22.7%, 26.2% and 18.1%, respectively. This allows us to create microsecond-response active-matrix PeLEDs that exhibit external quantum efficiencies above 20% at a display brightness of 500–3,000 cd m −2 for green devices with a resolution of 30 pixels per inch. We also develop microsecond-response red, green and blue active-matrix displays with 90 pixels per inch.
研究领域:
材料科学
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光电技术
·
显示技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Hongwei Zhang,Dong Yang,Qiang Long,Zihao Yan,Huishan Zhang,Tianxu Zhang,Yanbo He,Xin He,Weiqiang Hong,Yunong Zhao,Xiaohui Guo
In recent years, despite the extensive evolution of capacitive flexible pressure sensors, conventional capacitive pressure sensors are constrained by structural hardening, resulting in a limited pressure-response range. Here, an iontronic flexible pressure sensor based on a multistage gradient micro-dome structure was reported. The multistage gradient structure not only enhances the compressibility of the device, but also reduces the initial contact area. In addition, the sensor uses AgNWs as electrode materials to ensure that excellent electrical conductivity is maintained over a certain strain range, while polyvinyl alcohol and [BMIM]BF4 are employed as ionic layers to improve the performance of the ionic materials. The sensor achieves a maximum sensitivity of 8.1 kPa−1 within a pressure range of 2.1 Pa–600 kPa, and a fast response/recovery time of 25/20 ms. Moreover, it repeats compression/release 3000 times at a pressure of 26 kPa without significant signal drift. The sensor can identify different sitting positions and monitor laryngeal activity in wearable devices with strong repeatability and dynamic response recovery, enabling users to adjust incorrect sitting postures in a timely manner.
研究领域:
电子学
·
材料科学
·
可穿戴技术
·
生物医学工程
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产品关联
DOI
高影响因子
Gels
·
2025
·Vol. 11
·期 9
·682
·
IF 5.3
Mariia Kazharskaia,Yu Yu,Chenguang Liu
This study presents an innovative iontophoretic delivery system for glycolic acid (GA) based on polysaccharide microbeads embedded within an electrolyte hydrogel. The mi-crobeads, fabricated using a peristaltic pump, exhibited a uniform morphology with an average diameter of 1078 ± 140.38 μm and were successfully integrated into a hydrogel matrix (thickness: 4542.55 ± 337.24 μm). Comprehensive physicochemical characterization (FT-IR, XRD, SEM) confirmed effective component integration. The hydrogel demonstrated optimal mechanical properties with a tensile strength of 0.02 ± 0.003 MPa and reliable adhesion to various substrates, while maintaining excellent self-healing capabili-ties—post-repair conductivity remained sufficient to power an LED indicator. The material demonstrated favorable conductivity under various storage conditions while maintaining non-cytotoxic properties. Notably, microbead incorporation preserved electrochemical performance, as demonstrated by stable behavior in cyclic voltammetry using an Ag/AgCl reference system. Iontophoretic testing revealed significantly enhanced glycolic acid delivery at −1.0 V com-pared to passive diffusion. The system, combining PVA, PAA, alginate, [Bmim]BF4, and E. prolifera polysaccharides with gellan gum, shows strong potential for advanced cosmetic dermatology applications requiring precise active ingredient delivery.
研究领域:
药剂学
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透皮给药
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生物材料
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美容皮肤科学
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高分子科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhong-Yin Zhao,Xiaoxu Sun,Hongwei Gu,Zheng Niu,Pierre Braunstein,Jian-Ping Lang
Metal–organic framework (MOF) nanosheets with attractive chemical and structural properties have been considered as prominent oxygen evolution reaction (OER) electrocatalysts, while the insufficient exposed active sites and low electrical conductivity of MOFs limit their electrocatalytic activity and further industrial applications. Herein, a unique strategy to remarkably boost electrocatalytic OER activity of one Ni-based MOF is developed by the simultaneous incorporation of Fe3+ ions and BF4– anions within its layer structure. The optimized electrocatalyst NiFe-MOF-BF4–-0.3 NSs shows superior OER activity with a required ultralow overpotential of 237 mV at 10 mA cm–2, a small Tafel slope of 41 mV dec–1, and outstanding stability in an alkaline medium. The experimental and density functional theory (DFT) calculation results verify that the interactions between metal (M) ions and BF4– anions (defined as M···F, M = Ni or Fe) in this catalyst can adjust the adsorption abilities of oxygen intermediates and lower the free energy barrier of the potential-determining step by tailoring its electronic structure, thereby remarkably boosting its OER activity. This protocol provides new insights into surface and structure engineering of 2D MOFs, leading to greatly enhanced electrocatalytic OER performance.
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
·
理论化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）