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Gas-phase synthesis of Ti_(2)CCl_(2) enables an efficient catalyst for lithiumsulfur batteries

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The Innovation 2024年第1期5卷 33-40页

作者： Maoqiao Xiang Zihan Shen Jie Zheng Miao Song Qiya He Yafeng Yang Jiuyi Zhu Yuqi Geng Fen Yue Qinghua Dong Yu Ge Rui Wang Jiake Wei Weiliang Wang Haiming Huang Huigang Zhang Qingshan Zhu Chuanfang John Zhang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of chemical Engineering University of the Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China China Nuclear Power Engineering Co. Ltd.117 West Third Ring RoadNorth SectionBeijing 100840China College of Materials Science&Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Physics Guangdong Province Key Laboratory of Display Material and TechnologyCenter for Neutron Science and TechnologySun Yat-sen UniversityGuangzhou 510275China Solid State Physics&Material Research Laboratory School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China

MXenes have aroused intensive enthusiasm because of their exotic properties and promising ***,to date,they are usually synthesized by etching *** synthetic technologies provides more opportunities for innovation and may extend unexplored ***,we report a bottom-up gas-phase synthesis of Cl-terminated MXene(Ti_(2)CCl_(2)).The gas-phase synthesis endows Ti_(2)CCl_(2) with unique surface chemistry,high phase purity,and excellent metallic conductivity,which can be used to accelerate polysulfide conversion kinetics and dramatically prolong the cyclability of Li-S ***-depth mechanistic analysis deciphers the origin of the formation of Ti_(2)CCl_(2) and offers a paradigm for tuning MXene chemical vapor *** brief,the gas-phase synthesis transforms the synthesis of MXenes and unlocks the hardly achieved potentials of MXenes.

关键词： synthesis phase lithium

Highly efficient ternary organic solar cells with excellent open-circuit voltage and fill factor via precisely tuning molecular stacking and morphology

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Science China Chemistry 2024年第3期67卷 963-972页

作者： Dinghong Sun Zhenyu Chen Jianfeng Zhang Wei Song Jingyu Shi Jintao Zhu Yuanyuan Meng Fei Jin Shuncheng Yang Ziyi Ge Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China Faculty of Material Science and chemical Engineering Ningbo UniversityNingbo 315211China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049China Department of chemical and Environmental Engineering University of Nottingham NingboNingbo 315100China

The micro-morphology and molecular stacking play a key role in determining the charge transport process and nonradiative energy loss, thus impacting the performances of organic solar cells(OSCs). To address this issue, a non-fullerene acceptor PhC6-IC-F with alkylbenzene side-chain, possessing optimized molecular stacking, complementary absorption spectra and forming a cascade energy level alignment in the PM6:BTP-eC9 blend, is introduced as guest acceptor to improve efficiency of ternary OSCs. The bulky phenyl in the side-chain can regulate crystallinity and optimizing phase separation between receptors in ternary blend films, resulting in the optimal phase separations in the ternary films. As a result, high efficiencies of 18.33% as photovoltaic layer are obtained for PhC6-IC-F-based ternary devices with excellent fill factor(FF) of 78.92%. Impressively, the ternary system produces a significantly improved open circuit voltage(V_(oc)) of 0.857 V compared with the binary device,contributing to the reduced density of trap states and suppressed non-radiative recombination result in lower energy loss. This work demonstrates an effective approach for adjusting the aggregation, molecular packing and fine phase separation morphology to increase V_(oc) and FF, paving the way toward high-efficiency OSCs.

关键词： alkylbenzene side-chain morphology regulation ternary blends organic solar cells

Engineering pulp foam with highly improved water stability and multifunctional properties by incorporation of natural rubber and montmorillonite

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Green Carbon 2024年第2期2卷 231-241页

作者： Yidong Zhang Wangfang Deng Meiyan Wu Guang Yu Zhexuan Liu Na Cheng Haishun Du Chao Liu Bin Li cas Key Laboratory of Biobased Materials System Integration Engineering CenterQingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Department of chemical Engineering Auburn University212 Ross HallAuburnAL 36849USA Shandong Energy institute Qingdao 266101China Qingdao New Energy Shandong Laboratory Qingdao 266101China

Considering the aim of carbon neutrality and reducing plastic pollution,lightweight porous materials with good thermal insulation and mechanical robustness derived from renewable resources are in high ***-based pulp foams(PFs)offer considerable potential applications in many fields;however,the cost-effective manufacturing of PFs with satisfactory properties remains ***,we demonstrate a simple and low-cost strategy to prepare a novel pulp/natural rubber(PNR)foam by combining wood pulp fiber and natural rubber latex through wet foaming and oven drying,eliminating traditional freeze-drying and solvent exchange *** obtained PNR foam exhibited high porosity(98.4%-99.1%),low density(14.1–24.0 mg/cm^(3)),and excellent water stability(without disintegration under magnetic stirring for 14 days).Moreover,montmorillonite(MMT)was easily incorporated into the PNR during the preparation process,improving the mechanical strength and heat insulation of the obtained PNRMMT *** optimized PNR-MMT foam could be compressed more than ten times without losing its resilience,exhibiting a compressive strength of 2.7 MPa at 80%strain,five times higher than that of pristine ***,the PNR-MMT foam exhibited excellent flame retardant,good“spill”oil absorption,and good antibacterial properties towards Escherichia coli and Bacillus ***,this study provides a facile,sustainable,and low-cost route for manufacturing PNR-MMT foams with high resilience,good thermal insulation,excellent flame retardancy,and strong antibacterial properties,thus highlighting their usage potential in a broad range of applications.

关键词： Cellulose foam Natural rubber Montmorillonite Heat insulation Flame retardancy

CFD simulation of flow and mixing characteristics in a stirred tank agitated by improved disc turbines

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Chinese Journal of chemical Engineering 2022年第10期50卷 95-107页

作者： Zhuotai Jia Lele Xu Xiaoxia Duan Zai-Sha Mao Qinghua Zhang Chao Yang cas Key Laboratory of Green process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of chemical Engineering University of Chinese Academy of SciencesBeijing 100049China School of chemical Engineering Nanjing Tech UniversityNanjing 211816China

To reduce the power consumption and improve the mixing performance in stirred tanks,two improved disc turbines namely swept-back parabolic disc turbine(SPDT)and staggered fan-shaped parabolic disc turbine(SFPDT)are *** validation of computational fluid dynamics(CFD)model with experimental results,CFD simulations are carried out to study the flow pattern,mean velocity,power consumption,pumping capacity and mixing efficiency of the improved and traditional impellers in a dished-bottom tank under turbulent flow conditions,The results indicate that compared with the commonly used parabolic disc turbine(PDT),the power number of proposed SPDT and SFPDT impellers is reduced by 43%and 12%,and the pumping efficiency is increased by 68%and 13%,***,under the same power consumption(0-700 W·m^(-3)),the mixing performance of both SPDT and SFPDT is also superior to that of Rushton turbine and PDT.

关键词： Flow regime Mixing time Stirred vessel Computational fluiddynamics Improved discturbine

Selective recovery of Th（Ⅳ） from radioactive rare earth waste residue by utilizing MoS2-modified ion-absorbed type rare earth tailings

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Journal of Rare Earths 2024年第9期42卷 1782-1791页

作者： Xirong Chen Xinyu Fu Yun Gao Zhiyuan Zeng Bin Huang Xiaoqi Sun Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology cas Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences Fujian Research Center for Rare Earth Engineering Technology Xiamen institute of Rare Earth Materials Haixi InstituteChinese Academy of Sciences Fujian College University of Chinese Academy of Sciences Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths Ganjiang Innovation AcademyChinese Academy of Sciences

In the process of extracting ion-absorbed rare earth ore（IREO）,the production of radioactive waste is a major environmental *** address this issue,MoS2was used to modify ion-absorbed rare earth tailings（RET） to synthesize a novel MoS2@RET composite material for the effective handling of radioactive waste generated in IREO separation *** composite material was thoroughly characterized using various analytical techniques,including X-ray diffraction（XRD）,X-ray photoelectron spectroscopy（XPS）,thermogravimetry（TG）,Fourier-transform infrared（FTIR）,scanning electron microscopy（SEM）,Brunaue r-Emmett-Teller（BET） and energy dispersive spectroscopy（EDS）.By optimizing the operating parameters,the optimal experimental conditions were determined to be pH=3,contact time=60 min,liquid-solid ratio=6 g/L,and initial concentration=150 mg/*** adsorption data fitted well with the pseudo second-order rate *** thermodynamic parameters concerning the adsorption of Th（Ⅳ） were analyzed and *** isotherm model is a more fitting choice for the adsorption process compared to the Freundlich isotherm ***2@RET was used in the acid leachate of IREO waste residue,achieving the separation of Th and rare earth *** mechanism of Th（Ⅳ） adsorption by MoS2@RET was investigated,revealing that the adsorption process involves electrostatic interactions,chemical bonding,and redox *** above research results indicate that MoS2@RET composite materials have application potential in the sustainable treatment of IREO radioactive waste.

关键词： Rare earths Thorium Radioactive waste residue Adsorption Separation

Research progress on preparation and purification of fluorine-containing chemicals in lithium-ion batteries

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Chinese Journal of chemical Engineering 2022年第1期35卷 73-84页

作者： Xiaobin Liu Zhenguo Gao Jingcai Cheng Junbo Gong Jingkang Wang State Key Laboratory of chemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China cas Key Laboratory of Green process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China The Co-Innovation Center of Chemistry and chemical Engineering of Tianjin Tianjin 300072China

With the development of digital products,electric vehicles and energy storage technology,electronic chemicals play an increasingly prominent role in the field of new energy such as lithium-ion *** chemicals have attracted extensive attention in various *** of high-end electronic chemicals are high purity and low impurity content,which requires a very strict separation and purification *** present,crystallization is a key technology for their separation and purification of electronic *** this work,the representative fluorine-containing compounds in cathode and anode materials,separator and electrolyte of lithium-ion batteries are *** latest technologies for the preparation and purification of four kinds of fluorine-containing battery chemicals by crystallization technology are *** addition,the research prospects and suggestions are put forward for the separation of fluorine-containing battery chemicals.

关键词： Battery chemicals Lithium-ion batteries Crystallization Fluorine-containing chemicals

Abnormal adipose tissue-derived microbes drive metabolic disorder and exacerbate postnatal growth retardation in piglet

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Life Metabolism 2024年第2期3卷 55-69页

作者： Tongxing Song Ming Qi Yucheng Zhu Nan Wang Zhibo Liu Na Li Jiacheng Yang Yanxu Han Jing Wang Shiyu Tao Zhuqing Ren Yulong Yin Jinshui Zheng Bie Tan College of Animal Science and Technology Huazhong Agricultural UniversityWuhanHubei 430070China College of Animal Science and Technology Hunan Agricultural UniversityChangshaHunan 410000China Laboratory of Animal Nutritional Physiology and Metabolic process CAS Key Laboratory of Agro-ecological Processes in Subtropical RegionNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of SciencesChangshaHunan 410125China State Key Laboratory of Agricultural Microbiology Huazhong Agricultural UniversityWuhanHubei 430070China Hubei Key Laboratory of Agricultural Bioinformatics Huazhong Agricultural UniversityWuhanHubei 430070China

Postnatal growth retardation(PGR)frequently occurs during early postnatal development of piglets and induces high *** date,the mechanism of PGR remains poorly *** tissue-derived microbes have been documented to be associated with several disorders of metabolism and body ***,the connection between microbial disturbance of adipose tissue and pig PGR remains ***,we investigated piglets with PGR and found that the adipose tissue of PGR piglets was charac-terized by metabolism impairment,adipose abnormality,and specific enrichment of culturable bacteria from *** of Sphingomonas paucimobilis,a species of Sphingomonas genus from the alphaproteobacteria,induced PGR in ***,this bacterium could also lead to metabolic disorders and susceptibility to acute stress,resulting in weight loss in ***,multi-omics analysis indicated the changes in lipid metabolism as a response of adipose tissue to abnormal microbial *** experimental tests proved that one of the altered lipids phosphatidylethanolamines could rescue the metabolism disorder and growth retardation,thereby suppressing the amount of Sphingomonas in the adipose ***,these results highlight that the microbe–host crosstalk may regulate the metabolic function of adipose tissue in response to PGR.

关键词： adipose tissue microbe metabolic disorder postnatal growth retardation piglet

Prediction of atomization characteristics of pressure swirl nozzle with different structures

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Chinese Journal of chemical Engineering 2023年第11期63卷 171-184页

作者： Jinfan Liu Xin Feng Hu Liang Weipeng Zhang Yuanyuan Hui Haohan Xu Chao Yang School of chemical Engineering Sichuan UniversityChengdu 610065China cas Key Laboratory of Green process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of chemical Engineering University of Chinese Academy of SciencesBeijing 100049China College of chemical Engineering Nanjing Tech UniversityNanjing 211816China

The structure of the pressure swirl nozzle is an important factor affecting its spray *** work aims to study pressure swirl nozzles with different structures by experiment and *** the experiment,10 nozzles with different structures are designed to comprehensively cover various geometric *** terms of simulation,steady-state simulation with less computational complexity is used to study the flow inside the *** results show that the diameter of the inlet and outlet,the direction of the inlet,the diameter of the swirl chamber,and the height of the swirl chamber all affect the atomization performance,and the diameter of the inlet and outlet has a greater *** is found that under the same flow rate and pressure,the geometric differences do have a significant impact on the atomization characteristics,such as spray angle and SMD(Sauter mean diameter).Specific nozzle structures can be customized according to the actual *** analysis shows that the spray angle is related to the swirl number,and the SMD is related to turbulent kinetic *** data fitting,the equations for predicting the spray angle and the SMD are *** error range of the fitting equation for the prediction of spray angle and SMD is within 15% and 10% *** prediction is expected to be used in engineering to estimate the spray performance at the beginning of a real project.

关键词： Pressure swirl nozzle Nozzle structure Numerical simulation Spray angle Prediction

Balanced Polysulfide Containment and Lithium Ion Transport in Lithium-Sulfur Batteries via Nitrogen-doped Carbon Hollow Multi-shelled Structures on Modified Separators

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chemical Research in Chinese Universities 2024年第4期40卷 690-698页

作者： RAO Fu XIAO Qian WEI Yanze WANG Jiangyan YU Ranbo WANG Dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science&Technology BeijingBeijing100083P.R.China

Representing the next-generation technology in lithium-ion batteries,lithium-sulfur(Li-S)batteries offer increased specific energy without relying on scarce metals like nickel and cobalt,but suffer from a low practical specific energy due to poor conductivity and a short lifespan due to the shuttle effect of *** the confinement of polysulfides and the transport of lithium ions requires highly elaborate modifiers for *** multi-shelled structures(HoMSs)show promise as hierarchical mesostructures for separators,offering multiple shell layers and internal cavities that effectively inhibit polysulfide *** design of these structures is crucial to address these challenges *** this study,nitrogen-doped carbon HoMS(NC HoMS)was created using polymer templates through a precisely controlled polymerization *** featuring NC HoMS-modified separators exhibit improved capacity and cycling stability in comparison to those utilizing commercial ***,triple-shelled NC HoMS strikes a balance in polysulfide containment and lithium ion *** a sulfur loading of 6.34 mg/cm^(2),the Li-S battery can consistently complete 100 charge-discharge cycles,starting with a discharge capacity of 966.4 mA·h/g with a 75.8%capacity retention *** HoMS holds potential as the separator modifier in addressing the polysulfide shuttle problem and facilitating the Li-ion transportation for advanced Li-S batteries.

关键词： Hollow multi-shelled structure Carbon material Li-S battery Separator modification Shuttle effect