CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhiyu Ding,Qiming Tang,Yanchen Liu,Penghui Yao,Chen Liu,Xingjun Liu,Junwei Wu,Marino Lavorgna
Solid-state lithium metal batteries with higher energy density and safety are regarded as the promising next-generation energy storage devices. Porous materials hybrid with ionic liquids are becoming an important solid electrolyte due to the high ionic conductivity and enhanced interfacial compatibility. However, their poor electrochemical stability and limited Li + transport pathways remain challenged. Herein, an ionic-liquid-X zeolite hybrid is designed as the solid composite electrolyte to settle the above issues. The three-dimensional open framework of X zeolite acts as the “reservoir” of the ionic liquid providing a solid interconnected pathway to facilitate an effective lithium transmission. This transport is supported by both the TFSI − adsorption and EMIM + substitution in zeolite structure, which benefits the compatibility at electrolyte/lithium anode interface. The obtained composite electrolyte (Li-X-30) exhibits a superior ionic conductivity of 3.3 × 10 −4 S·cm −1 and a widened electrochemical window of 5.4 V. An ultralong lifespan of the assembled solid-state LiFePO 4 //metallic lithium battery is achieved with an outstanding capacity retention of 96% after 850 cycles. The designed electrolyte with ultra-long cycling stability may provide inspiration for the development of frontier solid electrolytes with potential applications in K, Na and other types of energy storage systems.
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JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Kang-Ning Gao,Hao-Ran Wang,Ming-Hui He,Yi-Qiu Li,Zhong-Hui Cui,Ya Mao,Tao Zhang
The development of solid-state lithium-oxygen batteries is currently limited primarily by the high solid-solid interfacial resistance and the lack of efficient assembly of electrolyte and electrode. In this work, noncovalent interactions between the cations of an ammonium ionic liquid and both solid electrolytes and carbon air cathodes are introduced. The ionic liquid-based electrolytes (ILE) are solidified on Li 6·40 La 3 Zr 1·40 Ta 0·60 O 12 (LLZTO) nanoparticles and gelated by multi-wall carbon nanotubes (MWCNTs), respectively, to construct LLZTO@ILE quasi-solid-state electrolyte (QSSE) and MWCNTs-LLZTO/ILE gel cathode (GC). The QSSE exhibits a high ionic conductivity of 1.71 × 10 −3 S cm −1 at 60 °C, high Li-ion transference number of 0.56, broad electrochemical window of ~4.8 V and good thermal stability . The GC shows outstanding compatibility with QSSE. Quasi-solid-state Li–O 2 batteries are assembled by integrating QSSE and GC films with a facile roll forming method, showing a low total interfacial resistance (~87 Ω cm 2 ), and excellent reversible cycles (70 cycles) with low charge overpotential (<0.44 V) and quite high electrical energy efficiency (>70%) at 60 °C and 200 mA g −1 . A 0.12 Ah pouch-type Li–O 2 battery was achieved by this method. These results suggest that the noncovalent interactions initiated by IL cations could be an effective approach to solve the solid-solid interface issue and achieve high discharge capacity in solid-state energy storage devices.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hang Xu,Anqi Niu,Zihan Shang,Geng Li,Fengmin Wu,Xuefeng Wei,Jun Zhang
A heterogeneous catalyst was prepared by wrapping a poly 3-butyl vinylimidazole cobalt chloride ionic liquid (P[BVIM]CoCl 3 ) around the surface of Fe 3 O 4 @SiO 2 magnetic nanoballs. This catalyst was coupled with the oxidant peroxymonosulfate (PMS) for extraction catalytic oxidation desulfurization (ECODS). The prepared desulfurization catalyst had superparamagnetic properties, with a saturation magnetization of 32.5 emu/g. Moreover, this caalyst was multi-porous material, ans it had a specific surface area and pore volume of 8.14 m 2 /g and 0.018 cc/g, respectively. The average pore diameter of catalyst was 3.9 nm. The optimal experimental conditions were as follows: the initial sulfur content of the oil was 500 ppm, the catalyst dosage was 30 mg, PMS (20 wt%) dosage was 0.6 g, the ACN dosage was 2 g, and the oil sample size was 6 g. After 20 min, a sulfur removal rate of over 98 % was achieved at 20 °C. Furthermore, the unpurified catalyst still maintained high desulfurization activity after being used for 5 times, demonstrating good stability. The desulfurization mechanism was divided into two steps: first, DBT was oxidized to DBTO by SO 4 − free radicals, and second, the DBTO was further oxidized to DBTO 2 by OH free radicals in a tandem reaction. The reaction rates for the two steps at 20 °C were 0.0144 sec −1 and 0.00115 sec −1 , respectively. The activation energies associated with these steps were 65.65 kJ/mol and 105.22 kJ/mol, respectively. The quencher t-butanol had no effect on the first step but significantly inhibited the second step, meaning that DBTO became the main oxidation product. One potential application of this study is the utilization of t-butanol to regulate the oxygen content in organic sulfide oxidation products.
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Protection of Metals and Physical Chemistry of Surfaces
·
2017
·Vol. 53
·期 1
·118-126
·
IF 0.707
Fashu S.,Khan R.
Ternary Zn–Mn–Ni alloy coatings were electrodeposited for the first time from a choline chloride based ionic liquid with the aim of collecting properties of binary Zn–Mn and Zn–Ni alloys into one alloy system. The effect of electrodeposition potential on the composition and corrosion performance of the obtained ternary Zn–Mn–Ni deposits was investigated and contrasted with the characteristics of Zn–Mn and Zn–Ni deposits. Cyclic voltammetry revealed that the deposition of ternary Zn–Mn–Ni alloys behaved differently from the deposition of binary Zn–Mn and Zn–Sn alloys and that Mn deposition takes place at positive potentials in the Zn–Mn–Ni electrolyte than in the Zn–Mn electrolyte due to the presence of Ni 2+ ions in the electrolyte. X-ray diffraction studies showed that the Zn–Mn–Ni ternary alloys consist of a lattice of Zn (with Mn and Ni imbedded inside) at low electrodeposition potentials and MnZn(with Ni imbedded inside) phase at high electrodeposition potentials. Chemical composition analysis show that the Mn content in the ternary Zn–Mn–Ni alloy increased with increase in electrodeposition potential, whereas Zn and Ni contents are suppressed. The corrosion tests results indicate that through addition of Ni into the Zn–Mn binary alloy, the Zn–Mn–Ni alloy tailored are more corrosion resistant than the Zn–Mn binary alloy whilst the passivation behavior is still preserved.
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JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
·
2016
·
IF 0.669
Junxiao Qin,Chunliu Yang,Yingying An,Erpin Liu,Ligai Bai,Haiyan Liu
A porous functionalized monolithic material based on ionic liquids (ILs) was produced through in situ polymerization within the confines of a stainless steel column (50 × 4.6 mm i.d.). In the processes, 1-vinyl-3-butylimidazolium chlorine ionic liquid, 1-dodecylene, and butyl methacrylate were used as ternary monomers; ethylene dimethacrylate as the cross-linker; azobisisobutyronitrile as the initiator; and dodecanol as the porogen. The optimized monolith showed high permeability as 13.54 × 10−14 m2, and high porosity as 75.08%. Then, its chromatographic characteristic was estimated by being used as the stationary phase of high-performance liquid chromatography (HPLC) to separate the mixtures of aromatic series compounds. Finally, the monolith was used to separate gastrodin from Chinese herb gastrodia rhizome; benzene and biphenyl from the effluent water, respectively. The column efficiency of the obtained IL-based monolith was calculated by the gastrodin peak as 22,000 plates m−1. Moreover, the repeatability of the method was studied with the RSDs calculated by retention times and peak areas of gastrodin peak as 0.79%, 1.23% (run-to-run, n = 6) and 0.86%, 1.89% (column-to-column, n = 6), respectively. The results confirmed that the produced monolith was successfully used as the stationary phase of HPLC to separate small molecules in real samples with high performance.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Yuxia Liu,Shiting Wang,Zhifeng Dai,Yubing Xiong
The cycloaddition reaction of CO2 and epoxides to form cyclic carbonates is a promising strategy to alleviate the climate change caused by CO2 in view of its high atomic economic efficiency and solvent-free and mild conditions. Inspired by the mechanism of cycloaddition reactions catalyzed by Lewis acid/Lewis base binary systems, we explored a series of heterogeneous catalysts functionalized by cobalt porphyrin cross-linked phosphonium salt poly(ionic liquid)s. Specifically, poly(4-vinylbenzyl chloride) (PVBnCl) was used as the polymer backbone. Then, PVBnCl was cross-linked by 5,10,15,20-tetra(4-pyridyl) porphyrin (TPyP) and quaternized by triphenylphosphine (PPh3). After complexing with CoCl2 and anion exchange, the as-prepared polymers CoTPyP-c-PVBnPPh3X were characterized using FTIR, SEM, TEM, XPS, TGA, ICP, and solid-state 13C NMR measurements. The results demonstrated that CoTPyP-c-PVBnPPh3X were efficient catalysts for the cycloaddition of CO2 and epoxides under mild conditions. Almost quantitative conversion of epoxides could be achieved at 80 °C and 1 atm CO2, and CoTPyP-c-PVBnPPh3X could be easily separated and reused for four cycles only with a little decrease in the catalysis activity. The synergistic catalysis of the Lewis acid metal center and nucleophilic halogen ion addressed the excellent performance of CoTPyP-c-PVBnPPh3X. Therefore, our findings provided a new solution for the development of efficient heterogeneous catalysts with multi-centers for CO2 conversion.
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INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2016
·
IF 1.411
Mingzhu Cui,Meiling Wang,Bingshe Xu,Xiaohong Shi,Dan Han,Junjie Guo
A facile route for producing reduced graphene oxide (RGO)-loaded Au nanoparticles based on ionic liquids (IL) has been proposed, in which the as-prepared RGO can be dispersed stably in water. With the assistance of IL, Au nanoparticles were uniformly and densely absorbed on the surfaces of the IL functionalised reduced graphene oxide (IRGO), forming a new composite of IRGO/Au with high dispersibility. This IRGO/Au composite enhanced its electrochemical signal obviously in the measurement of allura red in foods and exhibited a wider linear response ranging from 0.297 (0.0006 μmol L−1) to 99.3 μg L−1 (0.2 μmol L−1) with lower detection limit of 0.213 μg L−1 (0.00043 μmol L−1) at a signal-to-noise ratio of 3. To further study the practical applicability of the proposed sensor, the modified electrode was successfully applied to detect allura red in five kinds of common foods and the assay results were in a good agreement with the reference values detected by HPLC.
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TALANTA
·
2013
·
IF 3.498
Min Li,Jiaheng Zhang,Yubo Li,Bing Peng,Wenfeng Zhou,Haixiang Gao
A novel and facile microextraction technique, termed as ionic liquid-linked dual magnetic microextraction (IL-DMME), was developed for the determination of pyrethroids in honey samples. The distinct advantage of the proposed method is that high recoveries can be readily achieved through the combination of dispersive liquid–liquid microextraction (DLLME) and dispersive microsolid-phase extraction (D-μ-SPE) with the aid of synthetic ionic liquid and non-modified magnetic nanoparticles (MNPs), respectively. In the first DLLME step, [C 6 MIM]NTf 2 was used to extract the pyrethroids without the addition of any toxic dispersive solvent. In the following D-μ-SPE steps, non-modified MNPs were added to retrieve the ionic liquid. The effect of different variables on the extraction efficiency was studied simultaneously using the response surface methodology. The Plackett–Burman design was first employed to screen for the variables that significantly affected the extraction efficiency. Central composite design (CCD) was then introduced to optimize the significant factors using a polynomial fit. The optimal experimental conditions obtained from this statistical evaluation included: ionic liquid volume, 75 μL; S-BaFe quantity, 60 mg; sonication time, 4 min; vortex time, 100 s; desorption time, 150 s; and no addition of salt. Under the optimal conditions, good linearity in the range of 0.5 μg L −1 –500 μg L −1 , repeatability (RSD 1.1–3.8%), low LODs (0.03–0.05 μg L −1 ) and good recovery (86.7–98.2%) were obtained. Finally, the developed method was evaluated for the extraction and determination of four pyrethroids in real honey samples.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xiaonan Li,Xirong Huang
Here, a functionalized organic salt composed of [N k,k,k,k ] + ( k = 1–4) and [MES] - (2-(N-morpholino)ethanesulfonate), i.e., Good’s buffer ionic liquid with self-buffering and biocompatible properties, was chosen as electrolyte as well as buffer to construct a H 2 O/AOT/isooctane bicontinuous microemulsion for enzymatic synthesis of polyaniline (PANI). Studies on the effects of the functionalized organic salt on the phase behavior indicate that [N k,k,k,k ][MES] can tune the phase inversion temperature of AOT-stabilized oil-water microemulsion system through changing the cationic alkyl chain length, exhibiting the properties of both inorganic salt and co-alcohol. More interestingly, the stability of horseradish peroxidase (HRP) solubilized in the H 2 O(0.1 M [N 1,1,1,1 ][MES], pH = 4.5)/AOT/isooctane bicontinuous microemulsion is much better than that formulated with mixed surfactants AOT/SB-12 and inorganic salt. Studies on the HRP-catalyzed oxidative polymerization of aniline in the present bicontinuous microemulsion indicates that at low surfactant content and high oil-water ratio, the present microemulsion resulted in a PANI with better conductivity than the counterpart reported elsewhere. This work is of guiding significance for constructing a less-component and enzyme-compatible bicontinuous microemulsion for template-assisted biopolymerization.
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Catalysis Science & Technology
·
2014
·Vol. 4
·期 8
·2658-2663
·
IF 4.76
Huanjun Xu,Kongchen Wang,Hongye Zhang,Leiduan Hao,Jilei Xu,Zhimin Liu
The Ru/MMT@IL-SO3H catalyst was prepared by immobilizing Ru nanoparticles onto montmorillonite (MMT) with the assistance of an acidic ionic liquid (1-sulfobutyl-3-methylimidazolium hydrosulfate, IL-SO3H). Transmission electron microscopy examination indicated that the loaded Ru species were distributed uniformly on the MMT support with a particle size of about 1.3 nm, which existed mainly in the form of a metallic state as confirmed by X-ray photoelectron spectroscopy analysis. X-Ray diffraction analysis indicated that the interlayer distance of MMT was increased due to the impregnation of IL-SO3H. The activity of Ru/MMT@IL-SO3H for hydrodeoxygenation (HDO) of various phenolic compounds was investigated. It was demonstrated that the as-prepared catalyst served as a bifunctional catalyst and displayed high efficiency for HDO reactions of a series of phenolic compounds to cycloalkanes.
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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.
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MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2021
·
IF 0.896
Peng Zhu,Limin Wu,Wei Liu,Baozong Li,Yi Li,Yonggang Yang
A series of pyridinium-based chiral ionic liquid crystals were designed and synthesized. All of them exhibit enantiotropic smectic phases. The methylation on the pyridine ring not only decreases the melting point and clearing point, but also drives structural transitions from bilayer molecular packing structures to interdigitated monolayer ones at the smectic A and C phases. Due to entropy increase, the clearing point of the liquid crystal derived from 2-methylpyridine is higher than that derived from 3-methylpyridine, and then that derived from 4-methylpyridine.
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危险品化学品经营许可证（带存储）