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Molecule‑Level Multiscale Design of Nonflammable Gel Polymer Electrolyte to Build Stable SEI/CEI for lithium Metal Battery

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Nano-Micro Letters 2025年第1期17卷 404-423页

作者： Qiqi Sun Zelong Gong Tao Zhang Jiafeng li Xianli Zhu Ruixiao Zhu lingxu Wang Leyuan Ma xuehui li Miaofa Yuan Zhiwei Zhang Luyuan Zhang Zhao Qian Longwei Yin Rajeev Ahuja Chengxiang Wang Key Laboratory for liquid‑Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061People’s Republic of China Condensed Matter Theory Department of Physics and AstronomyUppsala UniversityUppsala 75120Sweden

The risk of flammability is an unavoidable issue for gel polymer electrolytes(GPEs).Usually,flameretardant solvents are necessary to be used,but most of them would react with anode/cathode easily and cause serious interfacial instability,which is a big challenge for design and application of nonflammable ***,a nonflammable GPE(SGPE)is developed by in situ polymerizing trifluoroethyl methacrylate(TFMA)monomers with flame-retardant triethyl phosphate(TEP)solvents and liTFSI–liDFOB dual lithium *** is strongly anchored to PTFMA matrix via polarity interaction between-P=O and-CH_(2)CF_(3).It reduces free TEP molecules,which obviously mitigates interfacial reactions,and enhances flame-retardant performance of TEP *** TEP molecules are also inhibited in solvation of li^(+),leading to anion-dominated solvation sheath,which creates inorganic-rich solid electrolyte interface/cathode electrolyte interface *** coordination structure changes li^(+)transport from sluggish vehicular to fast structural transport,raising ionic conductivity to 1.03 mS cm^(-1) and transfer number to 0.41 at 30℃.The li|SGPE|li cell presents highly reversible li stripping/plating performance for over 1000 h at 0.1 mA cm^(−2),and 4.2 V liCoO_(2)|SGPE|li battery delivers high average specific capacity>120 mAh g^(−1) over 200 *** study paves a new way to make nonflammable GPE that is compatible with li metal anode.

关键词： Anchoring effect Nonflammable gel electrolyte In situ cross-linked Electrode-electrolyte interface li metal battery

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Radical and(photo)electron transfer induced mechanisms for lignin photo-and electro-catalytic depolymerization

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Green Energy & Environment 2023年第2期8卷 383-405页

作者： Kejia Wu Minglong Cao Qiang Zeng xuehui li School of Chemistry and Chemical Engineering State Key Laboratory of Pulp&Paper EngineeringSouth China University of TechnologyGuangzhou510640China

As one of the three major components of woody biomass,lignin is a kind of natural organic polymer and the only abundant natural renewable resource with aromatic *** catalysis induced depolymerization is an important and effective approach for lignin *** particular,photocatalysis and electrocatalysis show great potential in accurately activating C-O/C-C bonds,which is a critical point of selective cleavage of *** this contribution,we focus on radical and(photo)electron transfer induced reaction mechanisms of the photo(electro)catalytic depolymerization of ***,the general situation of Carbon-centered radicals and active oxygen species mediated lignin conversion has been *** the mechanisms for(photo)electron transfer mediated lignin depolymerization have been *** the end of this review,the challenges and opportunities of photo(electro)catalysis in the applications of lignin valorization have been forecasted.

关键词： lignin Photocatalysis Electrocatalysis Depolymerization Reaction mechanism

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Which is the determinant for cellulose degradation in cooperative ionic liquid pairs: dissolution or catalysis?

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Science China Chemistry 2016年第5期59卷 557-563页

作者： Jinxing Long Yangyu Zhang Lefu Wang xuehui li School of Chemistry and Chemical Engineering South China University of Technology College of life Science and Technology Jinan University

Catalytic conversion of sustainable cellulose to the value-added chemicals and high quality biofuel has been recognized as a perfect approach for the alleviation of the dependence on the non-renewable fossil resources. Previously, we successfully de- signed and explored novel and efficient cooperative ionic liquid pairs for this renewable material, which has advantages of high reactor efficiency than current technologies because of the dissolution and in situ catalytic decomposition mechanism. Here, the determinant of this process is further studied by the intensive investigation on the relationship between the cellulose conversion and the properties of ionic liquid catalyst and solvent. Scanning electron microscope （SEM）, thermogravimetric analysis （TG） and elemental analysis were used for the comparative characterization of raw cellulose and the residues. The re- suits demonstrate that this consecutive dissolution and in situ catalysis process is much more dependent on the dissolution ca- pability of ionic liquid solvent, while comparatively, the effect of in situ acid catalysis is relatively insignificant.

关键词： cellulose ionic liquid dissolution in situ catalysis determinant

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Ionic liquids: Efficient solvent and medium for the transformation of renewable lignocellulose

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Science China Chemistry 2012年第8期55卷 1500-1508页

作者： LONG JinXing li xuehui WANG LeFu ZHANG Ning State Key Laboratory of Pulp&Paper Engineering School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China Department of Chemistry Nanchang UniversityNanchang 330047China

Carbon-enriched lignocelluloses are regarded as the perfect alternative for nonrenewable fossil fuel, and have a great potential to alleviate the increasing energy crisis and climate change. However, the tightly covalent structure and strong intra and in- ter-molecular hydrogen bonding in lignoceUulose make it high recalcitrance to transformation due to the poor solubility in wa- ter or common organic solvents. Dissolution and transformation of lignocellulose and its constituents in ionic liquids have therefore attracted much attention recently due to the tunable physical-chemical properties. Here, ionic liquids with excellent dissolving capability for biomass and its ingredients were examined. The technologies for lignocellulose biorefining in the presence of ionic liquid solvents or catalysts were also summarized. Some pertinent suggestions for the future catalytic conver- sion and unitization of this sustained carbon-rich resource are proposed.

关键词： ionic liquids lignocellulose dissolution biorefinery

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Base-free selective oxidation of monosaccharide into sugar acid by surface-functionalized carbon nanotube composites

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Chinese Chemical Letters 2023年第11期34卷 116-123页

作者： Zengyong li Di li linxin Zhong xuehui li Chuanfu liu Xinwen Peng State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510641China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510641China

Selective oxidation of biomass-derived monosaccharide into high value-added chemicals is highly desirable from sustainability ***,we demonstrate a surface-functionalized carbon nanotubesupported gold(Au/CNT-O and Au/CNT-N)catalyst for base-free oxidation of monosaccharide into sugar ***/CNT-O and Au/CNT-N surfaces successfully introduced oxygen-and nitrogen-containing functional groups,*** highest yields of gluconic acid and xylonic acid were 93.3%and 94.3%,respectively,using Au/CNT-N at 90℃ for 240 min,which is higher than that of using Au/*** rate constants for monosaccharide decomposition and sugar acid formation in Au/CNT-N system were higher,while the corresponding activation energy was lower than in Au/CNT-O *** calculation revealed that the mechanism of glucose oxidation to gluconic acid involves the adsorption and activation of O_(2),adsorption of glucose,dissociation of the formyl C-H bond and formation of O-H bond,and formation and desorption of gluconic *** activation energy barrier for the glucose oxidation over Au/CNT-N is lower than that of Au/*** nitrogen-containing functional groups are more beneficial for accelerating monosaccharide oxidation and enhancing sugar acid selectivity than oxygen-containing functional *** work presents a useful guidance for designing and developing highly active catalysts for producing high-value-added chemicals from biomass.

关键词： Surface functionalization Base-free oxidation Sugar acid Kinetic study DFT calculation

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Role of methoxy and C_(α)-based substituents in electrochemical oxidation mechanisms and bond cleavage selectivity of β-O-4 lignin model compounds

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Green Energy & Environment 2024年第1期9卷 114-125页

作者： Yang Zhou Qiang Zeng Hongyan He Kejia Wu Fuqiao liu xuehui li School of Chemistry and Chemical Engineering The Guangdong Provincial Key Laboratory of Green Chemical Product TechnologyState Key Laboratory of Pulp and Paper EngineeringSouth China University of TechnologyGuangzhouGuangdong510640China CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China

In order to better understand the specific substituent effects on the electrochemical oxidation process of β-O-4 bond, a series of methoxyphenyl type β-O-4 dimer model compounds with different localized methoxyl groups, including 2-(2-methoxyphenoxy)-1-phenylethanone, 2-(2-methoxyphenoxy)-1-phenylethanol, 2-(2-methoxyphenoxy)-1-(4-methoxyphenyl)ethanone, 2-(2-methoxyphenoxy)-1-(4-methoxyphenyl)ethanol, 2-(2,6-dimethoxyphenoxy)-1-(4-methoxyphenyl)ethanone, 2-(2,6-dimethoxyphenoxy)-1-(4-methoxyphenyl)ethanol have been selected and their electrochemical properties have been studied experimentally by cyclic voltammetry, and FT-IR spectroelectrochemistry. Combining with electrolysis products distribution analysis and density functional theory calculations, oxidation mechanisms of all six model dimers have been explored. In particular, a total effect from substituents of both para-methoxy(on the aryl ring closing to Cα) and Cα-OH on the oxidation mechanisms has been clearly observed, showing a significant selectivity on the Cα-Cβbond cleavage induced by electrochemical oxidations.

关键词： lignin model compounds β-O-4 dimers Electrochemical oxidation Oxidation mechanisms Substituent effect

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Biomass-based N doped carbon as metal-free catalyst for selective oxidation of D-xylose into D-xylonic acid

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Green Energy & Environment 2022年第6期7卷 1310-1317页

作者： Zengyong li Yiming Huang Xiao Chi Di li linxin Zhong xuehui li Chuanfu liu Xinwen Peng State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou510640China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou510640China

Rational design and facile preparation of low-cost and efficient catalysts for the selective converting of biomass-derived monosaccharides into high value-added chemicals is highly demanded,yet ***,we first demonstrate a N doped defect-rich carbon(NC-800-5)as metal-free catalyst for the selective oxidation of D-xylose into D-xylonic acid in alkaline aqueous solution at 100℃ for 30 min,with 57.4%*** doped graphitic N is found to be the active site and hydroxyl ion participating in the oxidation of *** ion and D-xylose first adsorb on NC-800-5 surface,and the aldehyde group of D-xylose is catalyzed to form germinal diols ***,C–H bond break to yield carboxylic ***,NC-800-5 catalyst shows high stability in recycled test.

关键词： Biomass carbon Metal-free catalysts D-xylose Sugar acid Selective oxidation

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Synthesis and fluorescent properties of quinoxaline derived ionic liquids

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Green Energy & Environment 2022年第5期7卷 996-1005页

作者： Jiaqi Wu Lei Zhang Jinxing Long Qiang Zeng Biaolin Yin xuehui li School of Chemistry and Chemical Engineering Guangdong Provincial Key Lab of Green Chemical Product TechnologyState Key Laboratory of Pulp&Paper EngineeringSouth China University of TechnologyGuangzhou510640China

Ionic liquids(ILs) have attracted increasing attention since last few decades due to their high molecular design abilities and wide applications in different *** this study,four novel fluorescent isoquinolino [2,1-a]quinoxalin-5-ium ILs were designed and synthesized via a two-step process including a simple dual Schiff’s base formation and a subsequent [RhCp*Cl_(2)]_(2)-catalyzed oxidative C-H activation/annulation *** as-synthesized ILs were extensively characterized using FT-IR,~1 H-NMR,^(13)C-NMR,^(19)F-NMR,HSQC-NMR,HMBC-NMR and *** photophysical properties were determined by steady-state fluorescence *** results demonstrate that all these ILs showed dual or triple emissions,large stokes shift(90 nm) and mechanochromic *** on solvatochromism and titration experiments,it is thought that the emission bands of the ILs are raised from their local excited states,charge transfer states or excited state proton transfer of cations,while the substitute effect of these quinoxaline derived ILs on their stokes shifts is negligible.

关键词： spectroscopy reaction liquids

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Composite electrolytes based on poly(ethylene oxide) and binary ionic liquids for dye-sensitized solar cells

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Science China Chemistry 2012年第8期55卷 1608-1613页

作者： YU YingHao JIANG Peng WANG FuRong WANG LeFu li xuehui State Key Laboratory of Pulp&Paper Engineering School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China

The sunlight is the largest single available source of clean and renewable energy to ensure human society＇s sustainable devel- opment. Owing to their low production cost and high energy conversion efficiency, dye-sensitized solar cells （DSSCs） have been regarded as good alternatives to conventional photovoltaic devices. Herein, a series of composite electrolytes based on poly（ethylene oxide）（PEO） and the binary ionic liquids 1-propyl-3-methy-imidazolium iodide （[PMIm]I） and l-ethyl-3- methylimidazolium thiocyanate （[EMIm][SCN]） were prepared and then applied to fabricate six DSSCs. The composite elec- trolytes were characterized by fourier transform infrared spectroscopy （FTIS）, X-ray diffraction （XRD）, and electrochemical impedance spectra （EIS）. It was shown that the addition of binary ionic liquids would reduce the degree of crystallinity of PEO thus improving the ionic conductivities of the electrolytes by about 2 orders of magnitude. Investigation on the photovoltaic performances of these DSSCs showed that the fill factor （FF） could reach up to 0.67 and energy conversion efficiency （η） could reach up to 4.04% under AM 1.5 full sunlight （100 mW/cm^2）.

关键词： solar energy dye-sensitized solar cell PEO binary ionic liquid composite electrolyte

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The Welfare Effects of Carbon Tax on Chinese Households: A Study Based on the 2013 Chip Survey Data

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Chinese Journal of Urban and Environmental Studies 2020年第4期8卷 22-41页

作者： li xuehui li Zhi WANG Zhengxin National Academy of Economic Strategy CASS The School of Economics Xiamen University Economics Building Xiamen University

Based on the micro-data from the 2013 Chinese Household Income Project(CHIP) Survey, the authors use a Quadratic Almost Ideal Demand System(QUAIDS) model to simulate and measure the impacts on the welfare of urban and rural households with different incomes after a carbon tax at 50 RMB/ton was levied in China. The results show that the collection of carbon tax will increase households’ consumer spending to varying degrees. In urban areas, the carbon tax exerts the greatest impact on low-income households, followed by high-income households; while in rural areas, it has the most significant effects on high-income households and the least on lowincome households. On the whole, carbon tax’s impact on urban households is greater than that on rural households. To a certain extent, it can help the household income inequality change for the better and narrow the urban–rural income gap. Since the carbon tax does not act on the distribution of Chinese household income in a simply regressive or progressive way, the authors believe that China should implement supporting policies such as tax subsidies or tax refund as supplements to carbon taxation in an effort to establish a mechanism for cyclic utilization of carbon tax revenue.

关键词： Carbon tax effect on income distribution QUAIDS model

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