ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Jiabao Zhu,Linghong Lu,Lili Shi,Zhongyang Dai,Wei Zhuang,Zhengsong Weng
The hydrophilicity/hydrophobicity of heterogeneous interface of the electrode material is critical for the performance of ionic liquids supercapacitors . However, the behavior of electrolytes at the electrode interface, especially the interface microstructure and properties is not yet clear. We investigated the electric double-layer of [emim][DCA] on slit pore of TiO 2 /C composite with the heterogeneous surface by combining molecular dynamics simulation and experimental measurements. The results of simulation show that coverage ratio of carbon on the surface affect the number density distribution, orientation and diffusion coefficient of [emim][DCA]. Moreover, we calculated the charge distribution of electric double-layer of [emim][DCA] and the capacitance. The results indicate that the capacitance of slit pore with the surface of TiO 2 with 78.7% carbon coverage ratio has the highest capacitance at high surface charge density. We performed an electrochemical experiment using composite of TiO 2 covered with carbon as the electrode material, and obtained the capacitance from cyclic voltammetry (CV). The experimental results also indicate there is an optimal coverage ratio of carbon, which achieves the highest capacitance. Our researches could provide a microscopic perspective of the electric double layer at the heterogeneous interface and the guidance for the design of electrode material.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2021
·
IF 2.991
Jinxia Wang,Xiangyue Liu,Hongwei Xie,Huayi Yin,Qiushi Song,Zhiqiang Ning
The magnetohydrodynamic (MHD) effect was usually used to improve the mass transport during electrodeposition in a solution electrolyte. Herein, we reported the effect of a magnetic field on the electrode process of Al electrodeposition in a [Emim]Cl-AlCl3 ionic liquid composed of pure ions. Under a uniform and perpendicular magnetic field to the Cu electrode plane, electrochemical impedance spectroscopy (EIS) of the circuit, the cyclic voltammetry (CV) curves, and the different capacitances at the potential of zero charge (PZC) were measured, and the electrodeposition of aluminum was carried out at a constant current density. The results indicated that a vertical magnetic field significantly reduced the resistance (activation energy) for charge transfer of electrochemical reduction of Al2Cl7–; meanwhile, the capacitance of an electric double layer (EDL) and the density of the electrodeposited aluminum layer were increased.
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Shujun Zhu,Jianguo Pan,Xinxin Chen,Hongbing Chen,Shangke Pan
Recently, zero-dimensional organic-inorganic lead halides perovskites have garnered considerable attention due to their exceptional photoelectric performance, however, the toxicity of lead makes their prolonged application difficult. In this work, centimeter-scale lead-free zero-dimensional perovskites [Emim] 4 [Cu 4 I 8 ] single crystals were grown by the solution evaporation method. The structure and composition of the crystals were analyzed using XRD , EDS , XPS , etc. The energy band structure and the partial density of states (PDOS) were calculated by using the density functional theory (DFT) based on the PBE hybrid functional. The excitation and emission spectra of the crystal material were determined under different conditions. The luminescence mechanism and fluorescence lifetime of the crystal were also analyzed, and the green emitting of the crystal was caused by self-trapped excitons (STEs). Interestingly, the compound showed excellent responsiveness to X-rays, which is rarely reported in organic-inorganic hybrid copper-based halides. Overall, [Emim] 4 [Cu 4 I 8 ] demonstrates its good potential.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Lianjing Mao,Xiaolong Zhou,Tianyu Zheng,Xiao Li,Xiufang Wang,Zhiyu Zhao,Wei Sun,Pengrui Zhang,Jinhe Sun
The metal ion extraction process is usually accompanied by the removal of coordinated water molecules and the change of water content in the extraction phase. However, hierarchical methodologies on water research are incredibly sparse, restricting a thorough knowledge of the extraction mechanism. It was clarified the diversity of water occurrence forms in the extraction phase and quantitative relationship between water, Li + and crown ether based on the (B12C4/B15C5/B18C6-[EMIm][NTf 2 ])-LiNTf 2 solvent extraction system. While the complexation mechanism between hydrated Li + and crown ether was discussed carefully. Firstly, it demonstrated that the water content of the extraction phase: B18C6 > B15C5 > B12C4. Secondly, the water in the extraction phase is mainly collected by solvent and crown ether, with the latter catching water primarily via Li + coordination and weak interactions. In the end, focusing on the water captured by the crown ether through Li + coordination, slope analysis and DFT calculations found that Li (H 2 O) 4 + was removed three water molecules to complex with B12C4 or B15C5, whereas B18C6 tends to remove two water molecules. It is precious for a thorough grasp of the mechanism and procedure of Li + extraction by crown ethers. What’s more, it offers novel strategies for investigating water content and transfer mechanisms in extraction systems.
研究领域:
化学
·
材料科学
·
理论研究
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2023
·Vol. 25
·期 8
·3046-3056
·
IF 9.8
Hailiang Sheng,Antai Zhu,Lihua Zhang,Jun Huang,Tongjun Yang,Shangdong Qin,Fazhi Zhang,Qinqin Xu,Haibo Xie
Taking advantage of the facile dissolution of chitosan in the green [EMIM][OAc]/GVL-based organic electrolyte solution (OES) and the satisfactory ionic conductivity of the OES, a one-pot strategy for the preparation of a sustainable chitosan/nano-SiO2 nanocomposite organic ionogel electrolyte (CSOIE) was successfully demonstrated through the integration of in situ physical cross-linking via hydrogen bonding using nano-SiO2 and a solution-gel transition induced by moisture after the dissolution of chitosan in the OES. The [EMIM][OAc]/GVL OES not only acted as an efficient solvent for chitosan dissolution, but also ensured high ionic conductivity of the organic ionogel electrolyte and desired electrochemical performance in the assembled flexible supercapacitors over a wide working temperature range. It was found that the storage modulus of the chitosan/nano-SiO2 nanocomposite organic ionogel electrolyte (CSOIE) increased with an increase in the content of nano-SiO2, and the introduction of nano-SiO2 particles into the gel matrix enhanced the mechanical properties and ionic conductivity simultaneously. The as-prepared C8S2OIE sample exhibited high ionic conductivity over a wide temperature range (2.3, 24.3 and 60.3 mS cm−1 at −25, 25 and 80 °C, respectively), and a desirable compressive stress of 1.52 MPa at 25 °C. The assembled flexible supercapacitor using the C8S2OIE sample displayed excellent capacitive performance and temperature-dependent specific capacitance (72.8, 84.6 and 113.2 F g−1 at −25, 25 and 80 °C at 0.1 A g−1, respectively), and long-term stability after 10 000 charge–discharge cycles. It is believed that the satisfactory mechanical properties of the as-prepared CSOIE can be ascribed to both the physically cross-linked chitosan chains via hydrogen bonding and chain entanglement, as well as hydrogen bonding interactions between chitosan chains and nano-SiO2 particles; moreover, the physical interactions were beneficial for the formation of desirable ion channels, thus enabling outstanding electrochemical properties. Consequently, the findings provide significant insights for the design and preparation of sustainable organic ionogel electrolytes using natural polymers, and the outstanding performance of the as-prepared CSOIE suggests significant potential applications in flexible energy storage and conversion devices in the future.
研究领域:
材料科学
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能源存储
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Ying Wei,Wei Chen,Xinyi Ge,Jiayi Liang,Zheng Xing,Qingguo Zhang,Zhong-Xia Wang
Ionogel electrolytes (IGEs) with chemical and thermal stability properties have attracted considerable attention for all-solid-state energy storage devices, particularly for high-performance supercapacitors (SCs). However, achieving high conductivity, flexibility, and toughness, as well as deformation and impact resistance in special cases, is challenging with the typical polymer based on ionic liquids (ILs). Here, an effective gelation strategy is proposed for the preparation of free-standing LiTFSI/[EMIM][TFSI]/PVDF-HFP ionogels (IGs) by double-additive induced physical cross-linking. The mechanical and electrochemical properties of the IGs can be synergistically optimized by the cross-linking and entanglement of LiTFSI and [EMIM][TFSI] with the PVDF-HFP network. The target IGs simultaneously exhibit excellent deformation capacity (over 50 %), high ionic conductivity (10.3 × 10 −3 S cm −1 at 25 °C), hardness (H: 728.6 kPa), and Young's modulus (E: 11.4 MPa), which can exhibit the specific capacitance of 274. 55 F g −1 , energy density of 38.13 Wh kg −1 and maximum power density of 2499.93 W kg −1 in the fabricated symmetric supercapacitor . The results will motivate us to further explore their applications for flexible electronic devices, wearable electronic skin, and flexible energy storage.
研究领域:
材料科学
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电化学
·
高分子物理
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能源存储
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柔性电子学
·
纳米复合材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Liangfei Ma,Shanbo Zhang,Shengming Zhang,Peiyu Li,Jiayue Li,Shuai Lei,Wei Sun,Guoxiang Zheng
To enhance the yield of biohydrogen production from corn straw, a methodology involving the synthesis of deep eutectic solvent (DES) using hydrogen bond acceptor [Emim][OAc] and hydrogen bond donor 1,4-butanediol and its application in the pretreatment was investigated. DES was prepared by mixing [Emim][OAc] and 1,4-butanediol solution with a concentration of 70% at a ratio of 4.7:100 (g:mL), followed by heating and stirring at 60 °C for 30 min. The optimal conditions for DES pretreatment were as follows: the liquid-solid ratio of the volume of DES to the mass of corn straw was 50:1 (mL:g), and the reaction temperature and reaction time were 121 °C and 1 h, respectively. The hydrogen yield was approximately 138.3 mL/g of corn straw. The comprehensive analysis outcomes derived from chemical analysis, FT-IR, 13 C NMR, XRD, TGA, and BET demonstrated that the hydrogen bonds within lignocellulose, the ester bonds between hemicellulose and lignin, the β -1,4 glycosidic bonds of cellulose and hemicellulose, and the β - O -4 bonds of lignin were disrupted, leading to the elimination of 86.79% of hemicellulose and 74.69% of lignin, thereby increasing the yield of hydrogen production from corn straw by 591.5%. The pretreatment efficacy of DES prepared from the fourth recycled [Emim][OAc] on corn straw did not deteriorate conspicuously. This study can offer a theoretical foundation for efficient hydrogen production from lignocellulosic biomass pretreated by DES.
研究领域:
生物能源
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Feifei Pei,Jiqing Lu,Lin Li,Jie Yan,Tian Bai,Haijiao Yu,Dong Wang,Guangping Han,Wanli Cheng
Sorption-based atmospheric water harvesting (SAWH) offers a promising solution to address freshwater scarcity. Although many solid sorbents exhibit high water uptake capacities, their ability to achieve continuous, all-day water production still depends on complex system configurations. Here, a 24-h SAWH system is presented, enabled by wood-based ionogel (WIG) with simultaneous sorption-desorption functionality. The WIG is prepared by encapsulating 1-ethyl-3-methylimidazolium acetate ([EMIM][Ac]) into the natural wood channels, functioning as a sorption module. Meanwhile, carbonized wood, with photothermal and Joule heating properties, serves as the desorption module. Adjusting the sorption/desorption area ratio enables dynamic kinetic balance, allowing simultaneous moisture uptake and release within a single ionogel. The WIG leverages the water transport capability of wood channels and the fluidity of [EMIM][Ac] to shorten the sorption equilibrium time to 3 h and sustain directional water transfer from the sorption to the desorption zone. This system, driven by solar heating during the day and Joule heating at night, achieves 24-h continuous water production, yielding 47.62 g water per day under natural conditions, equivalent to 2.38 L water m solar − 2 day − 1 ( L water m solar − 2 day − 1 , defined as liters of water produced per solar absorbing area per day). This work demonstrates a sustainable and efficient SAWH strategy, highlighting the unique advantages of wood and offering a new avenue toward mitigating the global water crisis.
研究领域:
环境科学
·
材料科学
·
水资源管理
·
能源工程
·
化学工程
·
可持续技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Yayimei Gao,Yicang Guo,Jiashu Li,Leyi Li,Yingjie Liu,Qing Ye,Jinlong Li
To enhance the separation efficiency of the acetonitrile–water azeotrope, the densities and viscosities of the azeotropic mixture with two entrainers─1-ethyl-3-methylimidazolium acetate ([EMIM][OAc], an ionic liquid) and a deep eutectic solvent (DES, denoted as GC3:1) prepared by glycolic acid and choline chloride at a molar ratio of 3:1─were experimentally determined at atmospheric pressure. Density measurements were performed over a wide composition range at temperatures from 283.15 to 333.15 K, while viscosity measurements were carried out at 293.15–333.15 K under the same composition range. Thermodynamic parameters including excess molar volume were calculated from the experimental density data. The experimental density and viscosity data were well correlated using empirical linear models, with high correlation coefficients. The addition of either entrainer significantly increased both the density and viscosity of the acetonitrile–water azeotrope. This work provides essential thermophysical data and thermodynamic parameters for acetonitrile recovery via extractive distillation, which offers valuable guidance for entrainer screening and process optimization in industrial applications.
✓ 已验证
产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2024
·Vol. 121
·期 8
·e2317796121
·
IF 9.4
Xuelong Liao,Shan Chen,Jialei Chen,Youzeng Li,Wei Wang,Tiantian Lu,Zhuo Chen,Lixin Cao,Yaxin Wang,Rong Huang,Xiaoting Sun,Runyu Lv,Huan Wang
Tremendous attention has been paid to the water-associated side reactions and zinc (Zn) dendrite growth on the electrode–electrolyte interface. However, the Zn pulverization that can cause continuous depletion of active Zn metal and exacerbate hydrogen evolution is severely neglected. Here, we disclose that the excessive Zn feeding that causes incomplete crystallization is responsible for Zn pulverization formation through analyzing the thermodynamic and kinetics process of Zn deposition. On the basis, we introduce 1-ethyl-3-methylimidazolium cations (EMIm+) into the electrolyte to form a Galton-board-like three-dimensional inert-cation (3DIC) region. Modeling test shows that the 3DIC EMIm+ can induce the Zn2+ flux to follow in a Gauss distribution, thus acting as elastic sites to buffer the perpendicular diffusion of Zn2+ and direct the lateral diffusion, thus effectively avoiding the local Zn2+ accumulation and irreversible crystal formation. Consequently, anti-pulverized Zn metal deposition behavior is achieved with an average Coulombic efficiency of 99.6% at 5 mA cm−2 over 2,000 cycles and superb stability in symmetric cell over 1,200 h at −30 °C. Furthermore, the Zn||KVOH pouch cell can stably cycle over 1,200 cycles at 2 A g−1 and maintain a capacity of up to 12 mAh.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yubin Yuan,Qianyi Yang,Qiang Wu,Xiangrui Bu,Xuming Wang,Weihua Liu,Chuanyu Han,Long Hu,Xin Li,Xiaoli Wang
Flexible electronics have been extensively investigated in recent years due to their convenient and wearable properties. Considering the practical applications in the external environment, the demand for portable and miniaturized sensing systems is prominent, for example, detecting harmful and toxic gases. Flexible sensors provide a potential novel solution for achieving the above goals, which is wearable sensing. In this paper, we develop a flexible sensor based on the ionic gel (Ion-Gel) for the detection of dimethyl methylphosphonate (DMMP). DMMP is a kind of organophosphorus gas, which may cause pollution to the environment and harm to biology. The Ion-Gel sensitive film is prepared through in-situ copolymerization of the polymer monomer poly(ethylene glycol) diacrylate (PEGDA), ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM-TFSI) and gas-sensing group hexafluoroisopropyl alcohol (HFIPA) under 365 nm ultraviolet light . The sensitive film can be patterned through a shadow mask on the interdigital electrodes ultimately. The sensor exhibits good sensitivity to the DMMP, with a lower limit of detection reaching 100 ppb under room temperature . Noteworthily, the sensor’s detecting upper limit is successfully extended to high gas concentrations at 800 ppm and maintains good linearity. A flexible print board circuit (FPCB) front-end is developed for the flexible DMMP sensor to construct a wearable platform that can be attached to the hand to achieve real-time detection. When the alarm threshold is set to 2 ppm DMMP, the proposed wearable detection platform can successfully give an alarm signal within 15 s
研究领域:
柔性电子
·
传感器
·
可穿戴技术
·
环境监测
·
有毒气体检测
✓ 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）