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Thermal Property Enhancement of a Novel Shape-Stabilized Sodium Acetate Trihydrate-Acetamide/Expanded Graphite-Based composite Phase Change Material

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Journal of Thermal Science 2024年第4期33卷 1564-1576页

作者： AN Zhoujian HOU Wenjie DU Xiaoze HUANG Zhongzheng MOMBEKI PEA Hamir Johan zhang Dong liu Xiaomin College of Energy and Power Engineering Lanzhou University of TechnologyLanzhou730050China Key Laboratory of Multi-supply System with Solar Energy and Biomass of Gansu Province Lanzhou730050China Gansu Natural Energy Research Institute Lanzhou730046China

Phase change materials(PCMs)are a kind of highly efficient thermal storage materials which have a bright application prospect in many fields such as energy conservation in buildings,waste heat recovery,battery thermal management and so *** inorganic hydrated salt PCMs have received increasing attention from researchers due to their advantages of being inexpensive and ***,inorganic hydrated salt PCMs are still limited by the aspects of inappropriate phase change temperature,liquid phase leakage,large supercooling and severe phase separation in the application *** this work,sodium acetate trihydrate was selected as the basic inorganic PCM,and a novel shape-stabilized {2. phase change material(CPCM)with good thermal properties was prepared by adding various functional *** first,the sodium acetate trihydrate-acetamide binary mixture was prepared and the melting point was adjusted using *** the binary mixture was incorporated into expanded graphite to synthesize a novel shape-stabilized *** thermophysical properties of the resultant shape-stabilized CPCM were systematically *** microscopic morphology and chemical structure of the obtained shape-stabilized CPCM were characterized and *** experiment results pointed out that acetamide could effectively lower the melting point of sodium acetate *** obtained shape-stabilized CPCM modified with additional 18%(mass fraction)acetamide and 12.(mass fraction)expanded graphite exhibited good shape stability and thermophysical characteristics:a low supercooling degree of 1.75℃and an appropriate melting temperature of 40.77℃were obtained;the latent heat of 151.64 kJ/kg and thermal conductivity of 1.411 W/(m·K)were also ***,after 50accelerated melting-freezing cycles,the obtained shape-stabilized CPCM represented good thermal reliability.

关键词： sodium acetate trihydrate melting point modification agent expanded graphite shape stability thermal conductivity enhancement

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Surface engineering on MnO_(2.nanorods by La single atoms to accelerate oxygen reduction kinetics

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Rare Metals 2024年第9期43卷 4302-4311页

作者： zhang-Long He liu-Qi Wang Min Jiang Jia-Nan Xie Shan liu Jin-Can Ren Rui Sun Wen-Bin Lv Wei-Bin Guo Yu-Ling liu Bing Li Qi liu Hao He School of materials Science and Engineering Changsha University of Science and TechnologyChangsha 410000China School of materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Physics City University of Hong KongHong Kong 999077China

Surface engineering,which modulates the electronic structure and adsorption/desorption properties of electrocatalysts,is one of the key strategies for improving the catalytic ***,we demonstrate a facile solid-phase reaction for surface engineering of MnO_(2.to boost the oxygen reduction *** reaction with surface hydroxy groups,La single atoms with loading amount up to 2.7 wt%are anchored onto a-MnO_(2.*** surface engineering,the oxygen reduction reaction(ORR)kinetics is significantly improved with the half-wave potential from 0.70 to 0.84 V,the number of transferred electrons from 2.5 to 3.9 and the limiting current density from 4.8 to 6.0 mA·cm^(-2..In addition,the catalyst delivers superior discharge performance in both alkaline and neutral metal–air *** functional theory(DFT)calculations reveal that atomic La modulates the surface electronic configuration of MnO_(2.,reduces its d-band center and thus lowers the OOH*and O*reaction energy *** work provides a new route for rational design of highly active electrocatalyst and holds great potential for application in various catalytic reactions.

关键词： Surface engineering Single atoms Electron injection Oxygen reduction reaction Metal-air batteries

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Preferential Formation of Ethylene via Electrocatalytic CO_(2. Reduction on Mesoporous Cu_(2.O Nanoparticles:Synergistic Effects of Pore structure Confinement and Surface Amine

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Chinese Journal of Chemistry 2024年第16期42卷 1846-1852页

作者： Haifeng zhang Dun Li Zhifang Chen Yingying Wang Haoyu Sun Feng liu Maochang liu Yiqun Zheng Hongwen Huang School of Chemistry Chemical Engineering and MaterialsJining UniversityQufuShandong 273155China College of materials Science and Engineering Hunan UniversityChangshaHunan 410082China Health Management Department Shandong Vocational College of Light IndustryZiboShandong 255300China International Research center for Renewable Energy National Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiotong UniversityXi'anShaanxi 710049China

We present a facile synthetic strategy to create mesoporous Cu_(2.O nanocrystals with tunable pore structures and surface functional groups of amine derivatives for efficient and preferable electrochemical conversion of CO_(2. into *** structural characteristics of theseCu_(2.O nanocrystals can be manipulated using a set of amine derivatives,such as pyridine,4,4'-bipyridine,and hexamethylenetetramine,during the oxidative etching process of Cu nanocrystals by bubbling gaseous oxygen in N,N-dimethylformamide *** amine derivatives not only serve as surface functional groups but also significantly affect the resulting pore *** synergistic effect of pore structure confinement and surface amine functionalization leads to the superb Faradaic efficiency(FE)of 51.9% for C_(2.H_(4),respectively,together with the C_(2.H_(4) partial current density of -2.9.4 mA·cm^(-2. at -0.8 V *** hydrogen electrode(RHE).The relatively high selectivity towards C_(2.H_(4) was investigated using DFT simulations,where 4,4'-bipyridine functionalized Cu_(2.O seemed to favor the C_(2.H_(4) formation with the low free energy of the *** study provides a feasible strategy to manipulate the pore structure and surface functionalization of mesoporous Cu_(2.O nanocrystals by regulating the oxidative etching process,which sheds light on the rational preparation of high-performance CO_(2.RR electrocatalysts.

关键词： Amines Ethylene Cuprous oxide CO_(2.reduction Mesoporous materials

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Recent advances on liquid intercalation and exfoliation of transition metal dichalcogenides: From fundamentals to applications

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Nano Research 2024年第3期17卷 2088-2110页

作者： Yan Tu Lingbin Xie Mengyang zhang Shujuan liu Zhongzhong Luo Longlu Wang Qiang Zhao State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Electronic and Optical Engineering and College of Flexible Electronics(Future technology) Jiangsu Province Engineering Research Center for Fabrication and Application of Special Optical Fiber Materials and DevicesNanjing University of Posts and TelecommunicationsNanjing 210023China

The weak van der Waals gap endows two dimensional transition metal dichalcogenides(2. TMDs)with the potential to realize guest intercalation and host ***,the liquid intercalation and exfoliation is a facile,low-cost,versatile and scalable strategy to modulate the structure and physiochemical property of TMDs via introducing foreign species into *** this review,firstly,we briefly introduce the resultant hybrid superlattice and disperse nanosheets with tailored properties fabricated via liquid intercalation and ***,we systematically analyze the intercalation phenomenon and limitations of various intercalants in chemical or electrochemical ***,we intensely discuss diverse functionalities of resultant materials,focusing on their potential applications in energy conversion,energy storage,water purification,electronics,thermoelectrics and ***,we highlight the challenges and outlooks for precise and mass production of 2. TMDs-based materials via liquid intercalation and *** review enriches the overview of liquid intercalation and exfoliation strategy,and paves the path for relevant high-performance devices.

关键词： two-dimensional transition metal dichalcogenides hybrid superlattice intercalation exfoliation

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MXene-based all-solid flexible electrochromic microsupercapacitor

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Microsystems & Nanoengineering 2024年第3期10卷 347-355页

作者： Shanlu Guo Ruihe Zhu Jingwei Chen Weilin liu Yuxiang zhang Jianmin Li Haizeng Li College of Electronic and Optical Engineering&College of Flexible Electronics(Future technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China School of materials Science and Engineering Ocean University of ChinaQingdao 266100China Optics and Thermal Radiation Research center Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Shenzhen Research Institute of Shandong University Shenzhen 518000China State Key Laboratory of Featured Metal materials and Life Cycle Safety for composite {2.s Guangxi UniversityNanning 530004China

With the increasing demand for multifunctional optoelectronic devices,flexible electrochromic energy storage devices are being widely recognized as promising platforms for diverse ***,simultaneously achieving high capacitance,fast color switching and large optical modulation range is very *** this study,the MXenebased flexible in-plane microsupercapacitor was fabricated via a mask-assisted spray coating *** adding electrochromic ethyl viologen dibromide(EVB)into the electrolyte,the device showed a reversible color change during the charge/discharge *** to the high electronic conductivity of the MXene flakes and the fast response kinetics of EVB,the device exhibited a fast coloration/bleaching time of 2.6 s/2.5 s,a large optical contrast of 60%,and exceptional coloration *** addition,EVB acted as a redox additive to reinforce the energy storage performance;as a result,the working voltage window of the Ti_(3)C_(2.-based symmetric aqueous microsupercapacitor was extended to 1 ***,the device had a high areal capacitance of 12.5 mF cm^(−2.with superior flexibility and mechanical stability and showed almost 100%capacitance retention after 100 bending *** as-prepared device has significant potential for a wide range of applications in flexible and wearable electronics,particularly in the fields of camouflage,anticounterfeiting,and displays.

关键词： capacitance kinetics exceptional

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Experimental observation of multiple topological nodal structure in LaSb_(2.

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Science china(Physics,Mechanics & Astronomy) 2024年第4期67卷 138-145页

作者： Yuxi Qiao Fuyi Wang Huaiqiang Wang Zicheng Tao Zhicheng Jiang Zhengtai liu Soohyun Cho Fayuan zhang Qingkai Meng Wei Xia Yichen Yang Zhe Huang Jishan liu Zhonghao liu Zengwei Zhu Shan Qiao Yanfeng Guo Haijun zhang Dawei Shen State Key Laboratory of Functional materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China National Synchrotron Radiation Laboratory and School of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China School of Physics and technology Nanjing Normal UniversityNanjing 210023China School of Physical Science and technology ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Wuhan National High Magnetic Field center and School of Physics Huazhong University of Science and TechnologyWuhan 430074China ShanghaiTech Laboratory for Topological Physics ShanghaiTech UniversityShanghai 201210China Institute of High-Pressure Physics School of Physical Science and technology Ningbo UniversityNingbo 315211China Collaborative Innovation center of Advanced Microstructures Nanjing UniversityNanjing 210093China center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Unconventional fermions in the immensely studied topological semimetals are the source for rich exotic topological ***,using symmetry analysis and first-principles calculations,we propose the coexistence of multiple topological nodal structure in LaSb_(2.,including topological nodal surfaces,nodal lines and in particular eightfold degenerate nodal points,which have been scarcely observed in a single ***,utilizing angle-resolved photoemission spectroscopy,we confirm the existence of nodal surfaces and eightfold degenerate nodal points in LaSb_(2..The intriguing multiple topological nodal structure might play a crucial role in giving rise to the large linear *** work renews the insights into the exotic topological phenomena in LaSb_(2..

关键词： eightfold degenerate points multiple topological nodal structure angle-resolved photoemission spectroscopy linear unsaturated magnetoresistance

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Sabatier principle guiding the design of cathode catalysts for Li-CO_(2. batteries

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Journal of Energy Chemistry 2024年第10期97卷 585-592,I0012页

作者： Haonan Xie Yimin zhang Biao Chen Chunnian He Chunsheng Shi Enzuo liu Naiqin Zhao School of materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsKey Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)Tianjin UniversityTianjin 300350China National Industry-Education Platform of Energy Storage Tianjin UniversityTianjin 300350China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207FujianChina

The Sabatier principle has been widely used for designing electrocatalysts for energy conversion applications,but it is rarely mentioned in the research of cathode catalyst of Li-CO_(2. *** our work,the"volcanic"relationship between the catalytic activity and the adsorption energy of the catalyst to the intermediates is first demonstrated based on the first-principles calculation,which meets the Sabatier principle and can be used to design the cathode *** increases in the number of nitrogenvacancy in WN shift the d-band center and increase the interaction with the *** catalytic activity increases first and then decreases with the increase of adsorption energy,which was proved in the *** optimal catalyst for moderate adsorption of intermediate makes the thin LiaCO_(3) distribute *** exhibits a median voltage difference of 0.68 V and an energy efficiency of 84.33%at2.μA cm^(-2.with a limited capacity of 2.0μA h cm^(-2..

关键词： Sabatier principle Bidirectional catalyst Transition metal nitrides Nitrogen-vacancy Li-CO_(2. batteries

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Return to the Moon:New perspectives on lunar exploration

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Science Bulletin 2024年第13期69卷 2136-2148页

作者： Yangting Lin Wei Yang Hui zhang Hejiu Hui Sen Hu Long Xiao Jianzhong liu Zhiyong Xiao Zongyu Yue Jinhai zhang Yang liu Jing Yang Honglei Lin Aicheng zhang Dijun Guo Sheng Gou Lin Xu Yuyang He Xianguo zhang Liping Qin Zongcheng Ling Xiongyao Li Aimin Du Huaiyu He Peng zhang Jinbin Cao Xianhua Li Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory for Mineral Deposits Research and School of Earth Sciences and Engineering Nanjing UniversityNanjing 210023China State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China Institute of Geochemistry Chinese Academy of SciencesGuiyang 550002China Planetary Environmental and Astrobiological Research Laboratory School of Atmospheric SciencesSun Yat-sen UniversityZhuhai 519082China National Space Science center Chinese Academy of SciencesBeijing 100190China Deep Space Exploration Laboratory/CAS Key Laboratory of Crust-Mantle materials and Environments University of Science and Technology of ChinaHefei 230026China Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai 264209China technology and Engineering center for Space Utilization Chinese Academy of SciencesBeijing 100094China School of Space and Environment Beihang UniversityBeijing 100191China

Lunar exploration is deemed crucial for uncovering the origins of the Earth-Moon system and is the first step for advancing humanity’s exploration of deep *** the past decade,the Chinese Lunar Exploration Program(CLEP),also known as the Chang’e(CE)Project,has achieved remarkable *** has successfully developed and demonstrated the engineering capability required to reach and return from the lunar ***,the CE Project has made historic firsts with the landing and on-site exploration of the far side of the Moon,along with the collection of the youngest volcanic samples from the Procellarum KREEP *** achievements have significantly enhanced our understanding of lunar *** on this success,china has proposed an ambitious crewed lunar exploration strategy,aiming to return to the Moon for scientific exploration and *** plan encompasses two primary phases:the first crewed lunar landing and exploration,followed by a thousand-kilometer scale scientific expedition to construct a geological cross-section across the lunar *** the limitations of current lunar exploration efforts and china’s engineering and technical capabilities,this paper explores the benefits of crewed lunar exploration while leveraging synergies with robotic *** study refines fundamental lunar scientific questions that could lead to significant breakthroughs,considering the respective engineering and technological *** research lays a crucial foundation for defining the objectives of future lunar exploration,emphasizing the importance of crewed missions and offering insights into potential advancements in lunar science.

关键词： Crewed lunar exploration Water and volatiles Composition and structure of lunar interior Volcanic activity and evolution of lunar mantle Space weathering and radiation environments Exploration technology

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Synthesis and Characterization of Shape Memory Polyurethane for Deployable structures

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Journal of Wuhan University of technology(materials Science) 2009年第S1期24卷 75-78页

作者：刘宇燕 Department of Polymer materials and Engineering Harbin Institute of Technology

A series of shape memory polyurethane elastomers(SMPUs) were synthesized by altering the chain *** reaction was proceeding by solution prepolymerization *** spectra(IR),Differential scanning calorimetry(DSC) and specific viscosity method were carried out to examine the structure,glass transition temperature(Tg) and molecular weight of these *** shape memory abilities and tensile properties of the material were investigated *** IR results showed that the SMPUs were successfully synthesized and the Tg of the samples were all above 45 ℃ according to the DSC *** the samples can recover to its original shape completely after bending to 180°.Tensile properties were tested on the *** sample MDI/PBAG/BDO with the mole ratio 4/1/3 gets the best tensile strength and highest ultimate elongation.

关键词： polyurethane synthesis Tg shape memory

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Multi-scale design of silicon/carbon composite anode materials for lithium-ion batteries:A review

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Journal of Energy Chemistry 2024年第10期97卷 30-45,I0002页

作者： liu Yang Shuaining Li Yuming zhang Hongbo Feng Jiangpeng Li Xinyu zhang Huai Guan Long Kong Zhaohui Chen State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBejing 102249China State Key Laboratoryof Mesoscience and Engineering Institute of Process EngineeringChinese Academy of Sciences Beijing 100190China Institute of Flexible Electronics(IFE) Northwestern Polytechnical UniversityXi'an 710129ShaanxiChina

Silicon/carbon composites,which integrate the high lithium storage performance of silicon with the exceptional mechanical strength and conductivity of carbon,will replace the traditional graphite electrodes for high-energy lithium-ion *** strategies have been designed to synthesize silicon/carbon composites for tackling the issues of anode pulverization and poor stability in the anodes,thereby improving the lithium storage *** effect of the regulation method at each scale on the final negative electrode performance remains ***,it has not been fully clarified how the regulation methods at each scale influence the final anode *** review will categorize the {2. structure into three scales:molecular scale,nanoscale,and ***,the review will examine modification methods at the molecular scale,focusing on the interfacial bonding force between silicon and ***,it will summarize various nanostructures and special shapes in the nanoscale to explore the construction of silicon/carbon ***,the review will provide an analysis of microscale control approaches,focusing on the formation of composite particle with micron size and the utilization of *** review provides a comprehensive overview of the multi-scale design of silicon/carbon composite anode {2. and their optimization strategies to enhance the performance of lithium-ion batteries.

关键词： Lithium-ion batteries Silicon/carbon composites Molecular scale Nanoscale Microscale

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