SEPARATION SCIENCE AND TECHNOLOGY
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2021
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IF 2.475
Haoran Liu,Siyu Chen,Xiuping Li,Rongxiang Zhao,Yue Sun
A series of [EMIM]DEP/nC3H4O4 (n = 1, 2, 3) deep eutectic solvents (DESs) were synthesized by heating and stirring the mixture of 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM]DEP) and propanedioic acid (C3H4O4). [EMIM]DEP/2C3H4O4 was characterized by Fourier transform infrared (FT-IR), 1H nuclear magnetic resonance (1H NMR), and thermogravimetric analysis (TGA). Dibenzothiophene (DBT) in model oil was removed using the DESs as an extractant and catalyst, and H2O2 as an oxidant. The influence parameters of different systems, temperature, n(H2O2)/n(S), dosage of [EMIM]DEP/2C3H4O4, and the sulfide type on desulfurization were investigated. The experimental results show that removal rate of DBT can attach to 98.2%. FT-IR analysis of DBT, DESs, and the mixture (DBT-DESs) show that there is an interaction between DBT and DESs.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry A
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2020
·Vol. 8
·期 32
·16265-16270
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IF 11.301
Wenjuan Han,Ming Lu,Junnan Chen,Haojie Li,Haibo Li,Bingsen Zhang,Wei Zhang,Weitao Zheng
EMIm+, as a substitute for Li+, can solve the initial problems that accompany lithiation/delithiation processes on an anode. However, the larger size of EMIm+ limits the options when it comes to electrode materials. Herein, a multilayered Ti3C2Tx MXene was electrochemically pre-intercalated with Fe ions to achieve EMIm+ hosting abilities. As a result, a pre-intercalated MXene electrode exhibited enhanced EMIm+ transport and storage capabilities. When integrated with an EMIm+[PF6]− ionic liquid electrolyte, the assembled DIB provides an energy density of 76 W h kg−1 at a power density of 360 W kg−1, and 94.3% of the energy density is retained after 50 cycles. Compared with a pristine example, the Fe pre-intercalated Ti3C2Tx MXene showed a significant increase in electrochemical performance. Employing this approach to optimize layered materials may open up a new route for accurately tuning intercalated materials.
研究领域:
材料科学
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电化学
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储能技术
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高影响因子
Catalysts
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2023
·Vol. 13
·期 2
·410
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IF 3.9
Shaokang Wang,Hang Xu
The intermediate di-[EMIM]Cl was synthesized from methyl imidazole and 1,4-dichlorobutane and then reacted with cobalt chloride at 105 °C to prepare a bi-[EMIM]CoCl3ionic liquid catalyst. The di-[EMIM]CoCl3catalyst coupled with oxone to remove sulfur-containing organics in octane. The di-[EMIM]CoCl3catalyst was characterized by HNMR, FTIR, TG, and SEM–EDS. The dibenzothiophene (DBT) was dissolved in octane to prepare a model oil with an initial sulfur content of 500 ppm. Six grams of the model oil was added. The results showed that the optimal dosages of di-[EMIM]CoCl3, oxone (20 wt%), and [BMIM]BF4extractant were 1 g, 2 g, and 2 g, respectively. At the optimum temperature of 45 °C, 100% of sulfur was removed after 40 min. After di-[EMIM]CoCl3was recycled five times, the sulfur removal percentage remained above 91%. The sulfur removal percentages for different sulfur-containing organics followed the order of dibenzothiophene (DBT) > benzothiophene (BT) > 4,6-dimethyldibenzothiophene (4,6-DMDBT). The oxidation product was determined to be DBTO2by GC–MS analysis, and the oxidation mechanism was discussed. The active oxygen atoms of oxone oxidized DBT to form DBTO, and then persulfate oxidized DBTO to DBTO2via an identical oxidation mechanism.Keywords:dicationic ionic liquids;cobalt chloride;oxone;desulfurization;catalytic oxidation
研究领域:
化学工程
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环境科学
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高影响因子
ACS Applied Electronic Materials
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2024
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IF 4.3
Guangpeng Ma,Feng Pan,Xinpu Zhou,Zhipeng Yong,Xiaodong Wang,Chenglong Li,Wenyu Bai,Shuang Wang
Hydrogel electrolytes have attracted wide attention because of their high ionic conductivity and anti-leakage characteristics. However, these advantages are hindered under extreme conditions. In this paper, an ionogel electrolyte for supercapacitors with a wide temperature range is constructed. It consists of a double cross-linked structure of polyacrylamide and 1-vinyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([VMIM][TFSI]), with the addition of ethylene glycol and choline chloride to form a deep eutectic solvent with a large hydrogen bonding network. On this basis, a partial ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM] [TFSI]) is innovatively added to choline chloride. The ionogel electrolyte exhibits a conductivity of up to 13.26 mS/cm at 90 °C. A flexible supercapacitor is assembled with activated carbon electrodes and has a wide voltage window of 2.4 V. The specific capacitance and energy density are 43.81 F/g and 35.1 Wh/kg, respectively, when the current density is 0.25 A/g. Remarkably, the device retains high coulombic efficiency (97.1%) and capacitance retention (94.3%) after 10 000 cycles. These excellent properties show that the ionogel electrolyte prepared in this work has broad application prospects.
研究领域:
材料科学
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电化学
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能源存储
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2020
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IF 2.369
Yaqi Ding,Neng Gao,Yongping Wu,Yongmei Xuan,Guangming Chen
Calcium chloride (CaCl2) aqueous solution as a liquid desiccant has the disadvantage of low vapor pressure and easy crystallization. Ionic liquids (ILs) such as [Emim]Cl, [Emim]Ac, and [Emim]Br have been verified to have a good ability to reduce the vapor pressure. In this paper, the vapor pressures of four kinds of CaCl2 + ILs + H2O were measured, which were CaCl2 + [Emim]Br + H2O (mass ratio CaCl2/[Emim]Br = 2:1) at temperatures of between 311.10 and 394.45 K, CaCl2 + [Emim]Cl + H2O (mass ratio CaCl2/[Emim]Cl = 2:1) at temperatures of between 306.58 and 393.89 K, CaCl2 + [Emim]Ac + H2O (mass ratio CaCl2/[Emim]Ac = 2:1) at temperatures of between 304.93 and 382.71 K, and CaCl2 + [Emim]NO3 + H2O (mass ratio CaCl2/[Emim]NO3 = 2:1) at temperatures of between 312.46 and 391.80 K, with the mass fraction of solute ranging from 0.2 to 0.5. The Antonie-type equation was used to fit the measured results. The average absolute relative deviation (AARD %) values of the measured vapor pressures and calculated vapor pressures were 0.52, 0.40, 0.33, and 0.27%, which showed good consistency and accuracy. Comparing the vapor pressures of the different solutions at the same concentration, the following order of the four anions with the ability to reduce the vapor pressure of CaCl2 + H2O can be drawn at a mass fraction of 0.4: Br– > Cl– > NO3– > Ac–.
研究领域:
化学工程
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热力学
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2021
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IF 3.178
Yaqi Ding,Neng Gao,Nian Li,Guangming Chen,Yongmei Xuan
The vapour-liquid equilibrium (VLE) data of four ternary solutions HCOOK + [Emim]Ac /[Emim]Br / [Emim]Cl / [Emim]NO 3 + H 2 O were measured using the boiling method at the temperatures from 305.78 K to 387.08 K, at solute (HCOOK + IL) mass fractions ( w ) between 0.2 and 0.5. A total of 234 data points ( w = 0 included) were obtained and correlated with empirical Antoine-type equations. The absolute average relative deviations (AARD %) between calculated and measured vapour pressures were 0.58%, 0.50%, 0.49%, 0.63%, respectively, which showed good agreement. The comparison of the experimental and standard data and combined uncertainties of the experimental data confirmed good reliability of the experimental method and apparatus. The four ternary solutions with ILs as additives have lower vapour pressure compared to the corresponding binary solutions without ILs. The results showed that the four ternary solutions of HCOOK + [Emim]Ac / [Emim]Br / [Emim]Cl / [Emim]NO 3 + H 2 O can be the alternatives for traditional dehumidification and absorption media. [Emim]Cl has the best ability to reduce the vapour pressure of HCOOK + H 2 O at the solute (HCOOK + IL) mass fraction of 0.4 and 0.5. The [Emim]Ac has the most effect reducing the vapour pressure of HCOOK + H 2 O at the solute (HCOOK + IL) mass fraction of 0.3.
研究领域:
化学工程
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热力学
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
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IF 2.298
Yongmei Xuan,Xianyu Ding,Neng Gao,Yaqi Ding,Xin Meng,Guangming Chen
1-Ethyl-3-methylimidazolium chlorine ([Emim]Cl) and 1-ethyl-3-methylimidazolium bromide ([Emim]Br) as an additive to working fluid [lithium bromide aqueous solution (H2O/LiBr) and lithium chloride aqueous solution (H2O/LiCl)] of absorption cycles were proposed. The vapor pressure of H2O + LiCl + [Emim]Cl (mass ratio LiCl/[Emim]Cl = 2) in the temperature from 314.79 to 435.48 K, H2O + LiCl + [Emim]Br (mass ratio LiCl/[Emim]Br = 2) in the temperature from 317.62 to 431.27 K, and H2O + LiBr + [Emim]Cl (mass ratio LiBr/[Emim]Cl = 2) in the temperature from 303.10 to 409.91 K was measured by the boiling point method. The mass fractions of the absorbent were from 0.30 to 0.60. The experimental data were regressed using the Antoine-type equation, and the average absolute relative deviation (AARD %) between the experimental data and calculated values of three systems was 0.44, 0.51, and 0.54%. Compared with that of the previously reported ionic liquids, ([Emim]Ac) as an absorbent for LiBr + H2O, vapor pressure of these four systems follows the order LiCl + [Emim]Cl + H2O < LiCl + [Emim]Br + H2O < LiBr + [Emim]Cl + H2O < LiBr + [Emim]Ac + H2O. The proposed ternary systems have better water affinity and can be promising alternative working fluids in the absorption cooling system.
研究领域:
化学工程
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热力学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 21
·10379-10385
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IF 3.925
Xiujing Lin,Xinshuang Liu,Shiyuan Xu,Zeyu Liu,Cuie Zhao,Ruiqing Liu,Pan Li,Xiaomiao Feng,Yanwen Ma
Solid polymer electrolytes (SPEs) for lithium metal batteries (LMBs) exhibit predominant safety over traditional carbonate-based organic liquid electrolytes. However, the low ionic conductivity of SPEs related to crystallinity at room temperature still hinders their practical application. The incorporation of nonflammable and ion-conductive ionic liquids (ILs) as plasticizer agents plays an active role in suppressing crystallinity. Herein, the relationship between the cations for ILs and the cycling performance of Li/LiFePO4 batteries were investigated. EMIM+ demonstrates the best ability for reversible Li+ intercalation/deintercalation behavior over other cations due to its superior cationic solvation, highest ion conductivity and lowest viscosity. The Li/LiFePO4 batteries based on the optimized EMIM+-encapsuled ionogel electrolyte could operate steadily over 120 cycles at 0.5C and room temperature. The results illustrate that the IL-plasticized hybrid electrolyte is a promising electrolyte candidate for room temperature solid state LMBs with high energy densities.
研究领域:
材料科学
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电化学
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高影响因子
Chemical Science
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2025
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IF 7.4
Fengjiao Meng,Junsen Zhong,Xiaoqian Tan,Jian-Bo Cheng,Bo Xiao,Shengliang Zhang,Fuyi Jiang,Wenbao Liu,Wei Liu,L Kang
Electrochromic (EC) windows are receiving numerous attentions owing to their flexibly adjustable optical properties controlled by external bias. Nevertheless, the widespread commercialization of EC windows still faces substantial impediments including high cost, intricate fabrication process, slow switching times and especially poor durability. Herein, we propose a facile yet high-performance EC system based on the reversible electrodeposition of iodine, which is theoretically free of “ion-trapping”, structure degradation, dendrite growth and corrosion issues encountered by the traditional EC windows. To overcomes the polyiodide shuttle problem, the electrolyte is further modified with [EMIM]+, which can coordinate with the polyiodide intermediates to form insoluble [EMIM]I3, and thereby effectively suppress polyiodide formation and shuttling. Moreover, the preferential adsorption of [EMIM]+ on to the Zn counter electrode ensures uniform and stable Zn deposition/striping, synergistically improving the durability of the I2-Zn EC window. With these multifaceted merits, the austere EC system simultaneously achieves rapid response speeds (tcoloring: 7 s, tbleaching: 6 s), high optical modulation amplitude (89.6% at 500 nm), impressive coloration efficiency (44.8 cm2 C-1) and excellent lifetime (without performance attenuation after 10,000 cycles). The scaling potential of the device is further demonstrated by constructing a large-area (10 * 10 cm2) device.
研究领域:
材料科学
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电化学
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功能材料
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智能窗技术
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能源材料
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产品关联
DOI
PubMed
高影响因子
FUSION ENGINEERING AND DESIGN
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2026
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IF 1.9
Tianyu Zheng,Chunsen Ye,Zhengyue Wang,Guannan Chen,Yu Qiu,Pengrui Zhang,Wei Sun,Jinhe Sun
The density, viscosity and conductivity of the B15C5-ILs system was presented. • Mathematical models based on physical data were established and discussed. • The variation trend depended on water and Li + content was investigated. The separation of lithium isotopes is of paramount importance for fusion energy systems, where 6 Li is indispensable for tritium breeding and 7 Li serves as a coolant in reactor blankets. Crown ethers have emerged as promising chelating agents for lithium isotope separation; however, the lack of fundamental physicochemical data for these extraction systems has posed significant challenges to process optimization and engineering scale-up. This study presents a systematic investigation of the density, viscosity, and electrical conductivity of the B15C5-[EMIm][NTf 2 ]-anisole system at room temperature, which is pertinent to Li + extraction and isotopic separation. Empirical correlations were established to describe the composition dependence of these properties. Additionally, the effects of introducing H 2 O and Li + into the organic phase on the physicochemical properties were examined. The findings provide critical foundational data and insights necessary for the rational design and optimization of lithium isotope separation systems and processes in fusion engineering. Download: Download high-res image (201KB) Download: Download full-size image
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高影响因子
Journal of Energy Chemistry
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2018
·
IF 3.886
Shichao Feng,Yuanyuan Wu,Jianquan Luo,Yinhua Wan
In this paper, AgBF 4 /[emim][BF 4 ] supported ionic liquid membranes (SILMs) were prepared successfully for CO/N 2 separation using nitrogen pressure immobilization procedures. The incorporation of AgBF 4 could decrease membrane weight loss, improve the pressure-resistant ability, and keep the critical pressure (0.45 MPa) of the SILMs. The high viscosity and undissolved AgBF 4 solids in membrane liquid would disturb gas molecular transport through membrane and give rise to the gas transport resistance. Therefore, the gas permeability decreased remarkably with increasing AgBF 4 carrier content in the membrane. When the molar ratio of AgBF 4 to [emim][BF 4 ] increased from 0:1 to 0.3:1, the CO/N 2 selectivity of the SILMs showed a great increase from ∼1 to ∼9 at 20 °C and 0.4 MPa, suggesting that AgBF 4 was an effective carrier for CO facilitated transport. The permeabilities of N 2 and CO increased at higher transmembrane pressure, indicating that molecular transport would dominate the transport process at high pressure. The temperature-dependent gas permeability followed the Arrhenius equation. Moreover, the differences between the activation energies of CO and N 2 became larger after introducing AgBF 4 , resulting in more obvious decrease in the CO/N 2 selectivity at higher operating temperature.
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高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
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2026
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IF 4.1
Xinhaoran Hu,Chenyu Sun,Yang Hu,Li Yang,Cencong Wang,Quanling Yang,Chuanxi Xiong,Zhuqun Shi
Growing focus on health and quality of life is driving increasing demand for skin-like wearable sensors in human motion monitoring and healthcare. Unlike traditional e-skin, ionic skin utilizes a polymer network scaffold with mobile ions, effectively overcoming the issue of poor dispersion of conductive fillers in polymer matrices. As an ionic liquid with facile synthesis and low cost, 1-ethyl-3-methylimidazolium chloride ([EMIM]Cl) forms strong interactions with both polymers and water molecules. Cellulose is a natural polymeric material with advantages such as low cost, environmental friendliness, and renewability. 2,2,6,6-Tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibrils (TOCNs) exhibit excellent biocompatibility. In this work, the TOCN-[EMIM]Cl ionic hydrogel was formed by mixing a TOCN dispersion with [EMIM]Cl ionic liquid, followed by Ca 2 + cross-linking. By adjusting the [EMIM]Cl content from 0 to 3 wt.%, the conductivity of the TOCN-[EMIM]Cl hydrogel increased from 9.43 × 10 −5 to 4.13 × 10 −4 S cm −1 . The obtained ionic skin exhibits high transparency, with a sensitivity of 2.11 kPa −1 , rapid response/recovery times (< 50 ms), and excellent cyclic stability (> 5000 cycles). Stable and distinguishable signal outputs have been achieved for human joint movements (wrist, elbow, and knee), demonstrating significant potential in flexible wearable sensors and health monitoring applications.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）