SOLID STATE IONICS
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2022
·
IF 3.699
Huizhe Niu,Nan Zhang,Minling Ding,Tongtong Hou,Donghao Zhang,Le Wang,Ping Guan,Xiaoling Hu
Poly(ionic liquids) (PILs) electrolytes combine the advantages of ionic liquids and polymers and have been widely studied to boost the performance of lithium batteries . However, one main problem that most of PILs electrolytes encounter is the tradeoff between mechanical integrity and high ionic conductivity . Therefore, elevating ionic conductivity is still a problem to be solved urgently. In this work, ether group-functionalized PIL is synthesized and an ionic liquid (IL) decorated metal−organic framework (MOF) filler IL@UIO-66 is prepared. Subsequently, one composite polymer electrolytes (MCPEs) involving IL@UIO-66 and PIL are built via solution-casting approach. The as-prepared optimal MCPE membranes with 10% IL@UIO-66 (MCPE-10%) express higher ionic conductivity as high as 2.06 × 10 −4 S cm −1 and larger lithium ion transference number of 0.49 at 30 °C than the electrolytes without filler (CPE). Comparing with CPE, the thermal stability of MCPE-10% is significantly improved to 300 °C by IL@UIO-66 and the electrochemical stability of MCPE-10% with an oxidation potential of 5.10 V vs. Li + /Li is almost unaffected. Besides, the interfacial stability between MCPE-10% and lithium electrode is improved. The assembled LiFePO 4 /MCPE-10%/Li cells show a promising rate and cycle performance at 25 °C. They show an initial discharge capacity of 123 mAh g −1 at current density of 0.5C, and their discharge capacity retention is up to 95% after 100 cycles with coulombic efficiency higher than 99%.
研究领域:
材料科学
·
能源存储与转换
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DOI
高影响因子
Soft Matter
·
2015
·Vol. 11
·期 26
·5253-5264
·
IF 4.029
Ge Wang,Peiyi Wu
The temperature-induced phase transition behaviors of a thermoresponsive ionic liquid (tributylhexylphosphonium 3-sulfopropylmethacrylate, [P4,4,4,6][MC3S]) and its polymer (poly-tributylhexylphosphonium 3-sulfopropylmethacrylate, P[P4,4,4,6][MC3S]) have been investigated using DSC, optical microscopy, temperature-variable 1H NMR, and FT-IR in combination with two-dimensional analysis methods, including perturbation correlation moving window (PCMW) and two-dimensional correlation spectroscopy (2Dcos). We found that there exists a distribution gradient of water molecules in P[P4,4,4,6][MC3S] ranging from hydrophobic backbones to hydrophilic sulfonates. Linked together by covalent bonds, P[P4,4,4,6][MC3S] would form an “urchin-like” structure, which can improve its stability and strengthen the gradient distribution of water. Finally, 2Dcos was employed to elucidate the sequential order of chemical group motions during heating. It is concluded that both [P4,4,4,6][MC3S] and P[P4,4,4,6][MC3S] experience the anionic dominated phase transition process. Moreover, the driving force for the phase transitions is shown to be the dehydration of hydrophobic ester carbonyls.
研究领域:
物理化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2014
·Vol. 5
·期 19
·5578-5590
·
IF 5.368
Wenlong Li,Peiyi Wu
Dynamic thermal phase transition behavior of a well-defined thermoresponsive ionic liquid (IL), [P4,4,4,4][SS], and its polymer, poly(ionic liquid) (PIL), P[P4,4,4,4][SS], synthesized by modified free radical polymerization was investigated by means of DSC, turbidity, temperature-variable 1H NMR, FT-IR spectroscopy measurements, in combination with perturbation correlation moving window (PCMW) and two-dimensional correlation (2Dcos) analysis. Obvious distinction was observed between the LCST of monomer and polymer solutions indicating their largely different dynamic transition process. Further studies revealed that the aggregation of [P4,4,4,4][SS] is mainly driven by the synergetic variations of cations and anions while the separation process of the P[P4,4,4,4][SS] solution is found to be dominated by conformation changes of anions. Finally, 2Dcos was employed to elucidate the sequence order of chemical group motion during heating. It is concluded that synergetic variations of cations and anions in the [P4,4,4,4][SS] solution resulted in the randomly aggregated structure of globules during separation. In contrast, in the P[P4,4,4,4][SS] solution, anions of repeated units tend to be wrapped into the aggregated globules while cations would distribute at the periphery of globules after transition. Additionally, several unusual phenomena were also interpreted, such as the different varying tendency in LCST of monomer and polymer solutions with increasing concentration, their distinction in the final transmittance and their rather different LCST at the same concentration.
研究领域:
高分子化学
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物理化学
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材料科学
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温敏材料
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光谱分析
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DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Yang Xue,Liu Aimin,Zhang Xin,Guan Pingping,Liu Yubao,Huang Haitao,Shi Zhongning
Aluminum chloride and triethylamine hydrochloride were employed in the synthesis of an AlCl 3 -Et 3 NHCl electrolyte. An aluminum sheet was utilized as the anode for the electrodeposition of metallic aluminum onto a copper substrate. This study aimed to investigate the effects of deposition potential on the morphology of the aluminum coating, the deposition mechanism, and the changes in Al(III) complex ions during the electrodeposition process. The results indicated that a deposition potential of − 0.3 V (vs. Al) produced aluminum coatings that were uniformly dense and securely adhered to the substrate. When electrodeposition occurred at − 0.5 V (vs. Al), the substrate surface exhibited aluminum nanowires with an approximate diameter of 367 nm. XRD analysis indicated a more pronounced (200) preferred orientation in the aluminum layer deposited at more negative potentials. Raman spectroscopy analysis detected the presence of AlCl 4 − and Al 2 Cl 7 − anions in the AlCl 3 -Et 3 NHCl system before electrodeposition, followed by the formation of Al 3 Cl 10 − complex ions in the system under potentiostatic control.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
PLASMA SCIENCE & TECHNOLOGY
·
2024
·
IF 1.6
Ruchen Shu,Hui Xu,Chenxiao Pei,Nan Wang,Xingang Liu,Jianyuan Hou,Yuan Yuan,Renxi Zhang
The ionic liquids (ILs), 1-butyl-3-methylimidazolium tetrafluoroborate treated with radiofrequency (RF) plasma, is proposed for functionalization and immobilization on polyethersulfone (PES) supports to form supported ionic liquid membranes (SILMs) for CO2 separation. The effects of treatment time and transmembrane pressure difference on CO2 permeance were evaluated. The best gas permeation performance is obtained when the treatment time is 10 min, and the transmembrane pressure difference is 0.25 MPa. Characterization of the materials by FTIR, XPS and NMR demonstrates that ILs is grafted with carboxyl groups and deprotonated through plasma treatment. A preliminary mechanism for the plasma treatment and facilitated transport of CO2 has been proposed based on this basis.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
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2022
·Vol. 95
·期 3
·430-435
·
IF 0.869
Zezhong Jiang,Haiyue Wang,Rongrong Zheng,Kun Liu,Qiao Zhou,Lei Han,Liying Guo
Abstract Supramolecular ionic liquid catalyst (SILC) was synthesized from 1,4-bis(2-hydroxy-ethoxybenzene) by substitution, ring-opening and cyclization reaction, etc. The chemical structures of SILC were characterized by FTIR and 1 HNMR. The catalytic performance of SILC was evaluated in a continuous distillation reactor for the synthesis of dimethyl carbonate from vinyl carbonate and methanol. And the service life of SILC was investigated. The results showed that the catalytic performance of SILC was not ideal when used alone, but the catalytic performance of the basic co-catalyst was significantly improved. Under the conditions of methanol and vinyl carbonate molar ratio of 10 : 1, the conversion rate of vinyl carbonate was 75.6%, and the selectivity of DMC was 91.4% at 110℃ for 4 h. The catalytic system can still maintain stable catalytic effect after being used for 6 times.
研究领域:
化学工程
·
催化材料
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Xin Song,Mingyi Li,Jiaqi Xiong,Fangjun Shao,Zhongzhe Wei,Wenjuan Fang,Jianguo Wang
The carboxylation of alkynes with CO 2 is a pivotal reaction in organic synthesis. However, the generally poor adsorption and activation of CO 2 in heterogeneous catalytic systems have become a bottleneck problem restricting the efficiency of carboxylation reactions. In this study, we proposed a strategy for modifying heterogeneous catalysts with ionic liquid. By utilizing amino acid ionic liquids to modify the Pd/In 2 O 3 catalyst, the electronic structure of palladium (Pd) nanoparticles is optimized, and the adsorption and activation of CO 2 on the catalyst is enhanced. Additionally, the h-In 2 O 3 support not only regulates the electronic structure of Pd nanoparticles but also provides abundant oxygen vacancies, which facilitates the adsorption of CO 2 in the system. Due to the synergistic catalytic effects of the amino acid ionic liquid and the oxygen vacancies in the h-In 2 O 3 support, the Pd/h-In 2 O 3 -BmimPro catalyst demonstrates a remarkable phenylpropiolic acid yield of 93 % under mild conditions (50 °C, 0.5 MPa). This study provides valuable insights into the application of ionic liquid-modified catalysts in CO 2 conversion technologies.
研究领域:
催化化学
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有机合成
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二氧化碳利用
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材料化学
·
绿色化学
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Tianhao Zhang,Hanwen Yan,Chong Zhang,Yiqian Yang,Jie Li,Guoliang Zhang,Junping Zhang,Gang Wang,Chunshan Li
Effective strategy is intensively desired to construct efficient and durable catalytic system for mild aldol condensation between aldehydes, considering the profound significance in synthesis of high-valued α , β -unsaturated aldehydes. Although series of mild catalytic systems using secondary amine-based catalysts have been proposed, the compatibility of high catalytic selectivity and durability still troubles the researchers in this field. Here, we developed a protonated diethanolamine ionic liquid catalyzed mild aldol reaction system with reasonable regulation of ion pair strength and ionic cluster microenvironment based on the deep insights into proton shuttle effects to improve catalytic selectivity and durability for the probed methacrolein synthesis. The interplay between the cation and anion mediated proton shuttle was elucidated by detailed kinetics derived from in situ Raman spectroscopy and theoretical calculations. Further experimental and characterization facts combined with molecular dynamic simulations identify the weak interaction of cation–anion pair and metastable worm-like cluster microenvironment facilitate proton shuttle and thus improve catalytic performance and durability. Consequently, the formation rate of methacrolein was enhanced by one fold, while overall side reaction rates were reduced by 27.5% compared to the conventional sec -amine catalyst. Additionally, this strategy also exhibited significant promotion in catalytic activity, selectivity, and durability in synthesis of the other representative α , β -unsaturated aldehydes. These findings will offer reference for the construction and modulation of ionic liquid catalyzed mild aldol reaction system utilizing proton shuttle effects.
研究领域:
化学工程
·
催化科学
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Jingshi Liang,Bo Liu,Zifei Zhao,Xiaolin Shi,Chunling Zhang
Ionic elastomers possess relatively good mechanical property and environmental stability. In this work, metal ions were introduced into main-chain polyimidazolium ionic liquids (PIMILs) to enhance the mechanical properties of PIMIL-based elastomers (PIEs) by utilizing metal coordination bonds and cation–π interaction. The tensile strengths of PIEs could be increased from 0.28 MPa to 5.93 MPa. The influences of metal ion species/ratios and PIMIL ratios on the elastomer properties were investigated. Results demonstrated that the elastomers had good thermal stability, solvent resistance, and humidity responsiveness. When PIMIL containing benzene rings and the content of metal ions increased, the glass transition temperature ( T g ) of PIEs significantly increased, and PIEs could realize the transformation from elastomers to plastics.
研究领域:
高分子材料科学
·
功能材料
·
软物质物理
✓ 已验证
产品关联
DOI
高影响因子
HYDROMETALLURGY
·
2025
·
IF 5.3
Xinyuan Lan,Rong Liu,Liyan Xue,Minzhong Huang,Meiying Xie,Hongye Wang,Hao Zhang,Fan Yang
The efficient recovery of lithium (Li + ) from salt lakes has become a pressing issue for the lithium battery industry. In this study, an electrochemically enhanced extraction system with industrialization potential was developed, which increased the separation efficiency of Li + by coupling an electric field with ionic liquid extraction. A promising 1-butyl-3-methylimidazolium-2-thiophenecarbonyl trifluoroacetone ([C 4 mim][TTA]) extraction agent was developed. Furthermore, the functionalized ionic liquid (FIL) was dissolved in an ionic liquid mixture to further increase its extraction capacity. The separation performance and mechanisms of Li + through [C 4 mim][TTA] liquid–liquid extraction were investigated. The results showed that within a pH range greater than 2, [C 4 mim][TTA] had a very high separation efficiency for Li + . Additionally, liquid–liquid extraction in solutions simulating the concentrations of Li + , Na + , and K + found in salt lakes revealed very high Li + separation coefficients of β Li/K = 3746 and β Li/Na = 1287. Under an applied electric field of 2.4 V, the electrochemically enhanced extraction system achieved separation coefficients of β Li/K = 6678 and β Li/Na = 3068 within 2 h, which represent the highest reported values to date. In this study, a novel electrochemically coupled ionic liquid extraction system with potential for industrialization is proposed.
研究领域:
化学工程
·
材料科学
·
电化学
·
环境科学
·
工业化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE TEXTILE INSTITUTE
·
2022
·
IF 1.77
Zhe Jiang,Yiyi Zhang,Qiang Wang,Ping Wang,Yuanyuan Yu,Man Zhou,Ende Li
Wool surface modification is essential for its application in the textile industry. In this work, a novel approach using reduced ionic liquid (IL) was applied to modify the surface of wool and enhance surface-related properties of wool for overcoming the unsustainable drawbacks in the present methods. The results from the surface morphology indicated that the wool was gradually dissolved from the outside to the inside of the fiber. The treated wool was characterized using the X-ray photoelectron spectroscopy (XPS), fluorescence microscopy and the Allwörden reaction. Moreover, felting shrinkage, mechanical properties, and dyeing properties of the treated wool were analyzed. Disulfide bonds were cleaved during the process from XPS test. The Allwörden reaction and fluorescence analysis showed damaged scale layer on the wool surface and an intact fiber main body with an acceptable loss of mechanical properties. Compared with the untreated wool, the anti-felting properties and dyeing performance improved due to the cleavage of disulfide bonds and the removal of the lipid layer, indicating that the treatment could modify the wool surface. Overall, the study supports a novel, facile and highly efficient approach for preparing a value-adding natural protein fiber with a potential for large-scale production.
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Yichen Li,Rui Zou,Weijiang Guan,Chao Lu
The efficiency of electrochemiluminescence (ECL) is often limited by insufficient electron transfer and reactant accumulation on electrode surfaces. Herein, tunable ionic liquid (IL)-based microdomains were assembled on gold electrodes to enhance the ECL of the Ru(bpy)32+/triethylamine (TEA) system in neutral solution. By varying the alkyl chain length of ILs, the interfacial microdomain size was systematically controlled, leading to pronounced differences in ECL enhancement. The smallest microdomains yielded a 20-fold enhancement in ECL compared with the bare electrode, whereas the largest microdomains showed only a 6-fold enhancement. Electrochemical and ECL measurements show that the IL microdomains accelerate the oxidation kinetics of TEA and increase the interfacial accumulation of Ru(bpy)32+. Similar amplification behavior was observed for ILs with different counteranions and in tripropylamine (TPrA)- and luminol-based ECL systems, indicating the generality of this IL-regulated interfacial engineering strategy. This work provides a promising approach for enhancing ECL efficiency, which supports high-performance ECL sensing technologies.
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）