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Flat Zn deposition at battery anode via an ultrathin robust interlayer

Nano Research 2024年第9期17卷 8104-8111页

作者： Yizhou Wang Jianyu Chen Zibo Chen Qian He Zhengnan Tian Jin Zhao Yanwen Ma Husam N.Alshareef materials Science and Engineering King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia State key laboratory of Organic Electronics and Information Displays(KLOEID)and jiangsu key laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Suzhou Vocational Institute of Industrial Technology Suzhou 215104China

Rechargeable aqueous zinc(Zn)ion batteries(AZIBs)using low-cost and safe Zn metal anodes are considered promising candidates for future grid-scale energy storage systems,but the Zn dendrite problem severely hinders the further prospects of *** Zn depositing behaviors toward horizontal alignment is highly effective and thus has received huge ***,such a strategy is usually based on previous substrate engineering,which requires complex preparation or expensive ***,it is essential to develop a novel solution that can realize horizontally aligned Zn flake deposition via easy operation and low ***,we report an ultrathin and robust Kevlar membrane as the interlayer to mechanically suppress Zn dendrite *** to the randomly distributed flaky dendrites in the control group,the deposited Zn sheets would grow into parallel alignment with the existence of such *** the dendrites are effectively suppressed,Zn||Cu asymmetric,Zn||Zn symmetric,and Zn||MnO_(2)full batteries using Kevlar interlayer deliver significantly improved cycling ***,the Zn||MnO_(2)pouch cell using a Kevlar interlayer delivers stable cycling performance and shows stable operation during multi-angle *** believe this work provides a new possibility for regulating Zn deposition from a crystallographic perspective.

关键词： Zn metal anodes Zn dendrites aqueous Zn ion batteries dendrite suppression (002)crystal plane

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Enhancing the electrochemical performance of Na metal anodes via local eutectic melting in porous Al-Cu alloy hosts

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Nano Research 2024年第7期17卷 6111-6118页

作者： Tao Hu Qiang Wu Cheng Wang Jialu Chen Fu Su Zibo Chen Yizhou Wang Jianyu Chen Yanwen Ma Jin Zhao State key laboratory of Organic Electronics and Information Displays&Institute of advanced materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China materials Science and Engineering King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Suzhou Vocational Institute of Industrial Technology 1 Zhineng AvenueSuzhou International Education ParkSuzhou 215104China

Sodium(Na)metal batteries(SMBs)have emerged as promising alternatives to lithium metal batteries for large-scale energy storage applications,owing to their cost-effectiveness,abundance,and favorable redox ***,the practical implementation of SMBs faces several challenges associated with the Na metal anode,including the formation of dendrites,low Coulombic efficiency,and capacity ***,we propose a novel approach to enhance the electrochemical performance of Na metal anodes through a porous Al-Cu alloy host(PAC)fabricated by a local eutectic melting *** local eutectic melting facilitates the development of a conductive network,offering mechanical support,and the porous structure provides abundant channels for the diffusion of Na ions and accommodates volume fluctuations in the Na metal during charge–discharge ***,the PAC exhibits a high average Coulombic efficiency of 99.8%at 1 mA·cm^(−2)for 1 mAh·cm^(−2)and a low voltage polarization of 19 mV during 500 *** study provides valuable insight into the design and fabrication of highperformance Na metal anodes,which hold significant promise for the advancements of next-generation energy storage systems.

关键词： Na metal anode porous Al-Cu alloy porous current collector local eutectic melting

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Multifunctional 2-(2-hydroxyphenyl)benzoxazoles: Ready synthesis,mechanochromism, fluorescence imaging, and OLEDs

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Chinese Chemical Letters 2024年第10期35卷 223-227页

作者： Kangmin Wang Liqiu Wan Jingyu Wang Chunlin Zhou Ke Yang Liang Zhou Bijin Li Chongqing key laboratory of Natural Product Synthesis and Drug Research School of Pharmaceutical SciencesChongqing UniversityChongqing 401331China jiangsu key laboratory of advanced Catalytic materials&Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China State key laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Triphenylamine(TPA)-containing 2-(2-hydroxyphenyl)benzoxazoles(2a-2c)have been synthesized via a highly efficient rhodium-catalyzed C–H/C–H cross-coupling *** 2a is a novel mechanofluorochromic material with blue-shifted mechanochromic *** 2b and 2c presented opposite mechanochromic *** 2b,the enol-form emission enhanced,and the ketoform emission blue-shift after *** contrast,2c exhibited the weak enol-form emission disappeared and the keto-form emission slightly red-shift after grinding *** estrone-containing2b-based water-dispersed nanoparticles(NPs)exhibit apparent dual-emission and were applied for fluorescence *** addition,bis(TPA)-containing 2c-based devices exhibit dual-emission with good performance and a singlet exciton yield of 92%,which breaks through the theoretical upper limit of 25%in conventional fluorescent *** is one of the highest exciton utilization values recorded for the ESIPT molecules with a dual emission system.

关键词： Rhodium-catalyzed 2-(2'-Hydroxyphenyl)benzoxazoles Mechanochromism Fluorescence images OLEDS

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Two-dimensional semiconductor transistors and integrated circuits for advanced technology nodes

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National Science Review 2024年第3期11卷 11-13页

作者： Weisheng Li Haoliang Shen Hao Qiu Yi Shi Xinran Wang National laboratory of Solid-State Microstructures School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures Nanjing University Suzhou laboratory The Interdisciplinary Research Center for Future Intelligent Chips(Chip-X) Nanjing University School of Integrated Circuits Nanjing University

Two-dimensional(2D) semiconductors,particularly transition metal dichalcogenides, exhibit high mobility within atomic-scale thickness, immunity to short-channel effects, and back-end-of-the-line(BEOL) compatibility wi...

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Enriched electrophilic oxygen species facilitate acidic oxygen evolution on Ru-Mo binary oxide catalysts

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Nano Research 2024年第3期17卷 1165-1172页

作者： Yaya Wang Yunzhou Wen Yumeng Cheng Xinhong Chen Mengjiao Zhuansun Tongbao Wang Jun Li Debora Meira Huarui Sun Jun Wei Jia Zhou Yuhang Wang Sisi He Shenzhen key laboratory of Flexible Printed Electronics Technology Harbin Institute of Technology(Shenzhen)University TownShenzhen 518055China School of Science Harbin Institute of Technology(Shenzhen)University TownShenzhen 518055China Institute of Functional Nano&Soft materials(FUNSOM) Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhou 215123China Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong UniversityShanghai 200240China Science Division Canadian Light SourceSaskatoonSKS7N 2V3Canada Photon Science Division Argonne National LaboratoryLemontIL60439USA School of materials Science and Engineering Harbin Institute of Technology(Shenzhen)University TownShenzhen 518055China

The polymer electrolyte membrane(PEM)electrolyzers are burdened with costly iridium(Ir)-based catalysts and high operation overpotentials for the oxygen evolution reaction(OER).The development of earth-abundant,highly active,and durable electrocatalysts to replace Ir is a critical step in reducing the cost of green hydrogen *** we develop a Ru5Mo4Ox binary oxide catalyst that exhibits high activity and stability in acidic *** electron-withdrawing property of Mo enriches the electrophilic surface oxygen species,which promotes acidic OER to proceed via the adsorbate evolution *** a result,we achieve a 189 mV overpotential at 10 mA·cm^(-2) and a Tafel slope of 48.8 mV·dec^(-1).Our catalyst demonstrates a substantial 18-fold increase in intrinsic activity,as evaluated by turnover frequency,compared to commercially available RuO_(2) and IrO_(2) ***,we report a stable OER operation at 10 mA·cm^(-2) for 100 h with a low degradation rate of 2.05 mV·h^(-1).

关键词： electrocatalysis oxygen evolution reaction(OER) ruthenium(Ru)-based oxide molybdenum electrophilic oxygen

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Er和Sc对Al-Cu合金时效行为和θ′析出稳定性的协同作用(英文)

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Transactions of Nonferrous Metals Society of China 2024年

作者：侯兴凯文胜平亓鹏魏午吴晓蓝黄晖高坤元熊湘沅聂祚仁北京工业大学工业大数据应用技术国家工程实验室材料与制造学部中国铝业科学技术研究院有限公司

通过透射电子显微镜（TEM）和高角度环形暗场（HAADF）系统研究了Er和Sc协同添加对合金时效和界面偏析行为的影响。TEM结果表明，具有核壳结构的Al3（Sc，Zr）可以作为θ′的形核位点促进其均匀细小析出。STEM结果表明，在225 ℃下热暴... 详细信息

通过透射电子显微镜（TEM）和高角度环形暗场（HAADF）系统研究了Er和Sc协同添加对合金时效和界面偏析行为的影响。TEM结果表明，具有核壳结构的Al3（Sc，Zr）可以作为θ′的形核位点促进其均匀细小析出。STEM结果表明，在225 ℃下热暴露150 h的过程中，Er溶质原子优先富集在θ′相结构内部。然而，在300 ℃时才观察到Sc和Mn溶质原子在θ′/αAl基体界面处的偏析。由于Er在θ′相结构中的早期富集，才能够使缓慢扩散的Sc和Mn在θ′相发生严重粗化之前偏析到θ′沉淀物的界面处，从而在更高的温度下进一步稳定θ′沉淀物。

关键词： Er/Sc共添加时效行为 θ′析出稳定性溶质偏析 Al-Cu合金

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Modeling of gas porosity and microstructure formation during dendritic and eutectic solidification of ternary Al-Si-Mg alloys

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Journal of materials Science & Technology 2021年第17期76卷 76-85页

作者： Mengdan Hu Taotao Wang Hui Fang Mingfang Zhu jiangsu key laboratory of advanced metallic materials School of Materials Science and EngineeringSoutheast UniversityNanjing211189China

A two-dimensional(2-D)multi-component and multi-phase cellular automaton(CA)model coupled with the Calphad method and finite difference method(FDM)is proposed to simulate the gas pore formation and microstructures in solidification process of hypoeutectic Al-Si-Mg *** this model,the pore growth,and dendritic and eutectic solidification are simulated using a CA *** achieve the equilibrium among multiple phases during ternary Al-based alloy solidification,the phase transition thermodynamics and kinetics are evaluated by adopting the Calphad *** diffusion equations of hydrogen and two solutes are solved by *** developed CA-FDM coupled model can be used for simulating the evolution of gas microporosity and microstructures,involving dendrites and irregular binary and ternary eutectics,of ternary hypoeutectic Al-Si-Mg *** has the capability of reproducing the interactions between the hydrogen microporosity formation and the growth of dendrites and eutectics,the competitive growth among the growing gas pores of different sizes,together with the time-evolving concentration fields of hydrogen and *** simulated morphology of gas pore and microstructure has a good agreement with the experimental *** influences of the initial hydrogen concentration and cooling rate on the microporosity formation are *** is found that the main portion of porosity formation occurs in the eutectic solidification stage through analyzing the profiles of porosity percentage and solid fraction varying with solidification *** varying features of simulated porosity percentage,the maximum and average pores radii indicate that increasing initial hydrogen concentration promotes the formation of higher final porosity percentage and larger pores,while the size of gas pores will significantly reduce with increasing cooling rate,leading to a lower final porosity percentage.

关键词： Porosity Solidification microstructures Ternary Al-Si based alloys Diffusion Cellular automaton

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Co-Free High-Entropy Alloys Powders Immobilized by Electrospray and Microf luidics for Decolorization of Azo Dye

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Acta Metallurgica Sinica(English Letters) 2020年第8期33卷 1103-1110页

作者： Shikai Wu Wei Gao Tao Lu Ye Pan School of materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjing 211189China School of Energy and Environment Key Laboratory of Energy Thermal Conversion and Control of Ministry of EducationSoutheast UniversityNanjing 211189China

In recent years,high-entropy alloys(HEAs)have received more and more attention due to their unique microstructure and *** researchers have reported that some ball-milled(BM)HEAs powders possess prominent decolorization performance for azo *** kinds of Co-free HEA powders(AlCrFeMn,AlCrFeNi and FeCrNiMn)have been synthesized by ball milling in this work,of which AlCrFeMn shows the best decolorization efficiency for DB6 aqueous ***,at this time,the BM HEAs are in powder state and not easy to be reused,so the loss rate of the powders is high during the ***,the reaction between reacted the powders and the dye solution is too fast to ***,in order to solve these problems,this work proposes to immobilize bare BM AlCrFeMn HEA powders in calcium alginate beads(CAB s)by electrospray and *** four cycles of reaction,the loss rate of the AlCrFeMn powders can be reduced from 40 to 5 wt%if the powders are immobilized by CABs with an average diameter of 0.55 mm obtained at the DC voltage of 30 *** addition,in the four cycles of experiment,the AlCrFeMn HEA-CABs with an average diameter of0.55 mm shows better stability and easier separation than that of the bare AlCrFeMn *** findings provide new ideas for HEAs to decolorize azo dyes and are of great significance for protecting freshwater resources.

关键词： High-entropy alloys Ball-milled Decolorization performance Calcium alginate beads Electrospray and microfluidics

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Azo dye degradation behavior of AlFeMnTiM(M = Cr, Co, Ni) high-entropy alloys

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International Journal of Minerals,Metallurgy and materials 2019年第1期26卷 124-132页

作者： Shi-kai Wu Ye Pan Ning Wang Tao Lu Wei-ji Dai School of materials Science and Engineering Southeast University Jiangsu Key Laboratory for Advanced Metallic Materials

Because of the potential carcinogenic effects and difficult degradation of azo dyes, their degradation has been a longstanding problem. The degradation of azo dye Direct Blue 6(DB6) using ball-milled(BM) high-entropy alloy(HEA) powders was characterized in this work. Newly designed AlFeMnTiM(M = Cr, Co, Ni) HEAs synthesized by mechanical alloying(MA) showed excellent performance in the degradation of azo dye DB6. The degradation efficiency of AlFeMnTiCr is approximately 19 times greater than that of the widely used commercial Fe–Si–B amorphous alloy ribbons and more than 100 times greater than that of the widely used commercial zero-valent iron(ZVI) powders. The galvanic-cell effect and the unique crystal structure are responsible for the good degradation performance of the BM HEAs. This study indicates that BM HEAs are attractive, valuable, and promising environmental catalysts for wastewater contaminated by azo dyes.

关键词： high entropy alloy mechanical alloying AlFeMnTiM degradation performance azo dye

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Solution combustion synthesis of high-entropy metal spinel oxide as oxygen evolution reaction catalyst

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China Foundry 2022年第6期19卷 551-558页

作者： Tao Lu Yue Zhang Li Ding Hao-yue Zheng Ye Pan School of materials Science and Engineering Southeast UniversityJiangsu Key Laboratory of Advanced Metallic MaterialsNanjing 211189China

High-entropy metal spinel oxide(HEO)is proved to be a promising oxygen evolution reaction(OER)catalyst with high catalytic performance and stability.A short routine synthesis process based on solution combustion synthesis was proposed to prepare(Co_(0.25)Ni_(0.25)Mn_(0.25)Zn_(0.25))Fe_(2)O_(4)spinel HEO in this *** the process,the products were rapidly synthesized and melted due to the high-temperature reaction,and then quickly crystallized on the surface of nickel foam to form a nano-structure *** the aid of nano-scale spinel structure,the overpotential of non-activation HEO electrode reaches 276 mV at the current density of 10 mA·cm^(-2),and after 100 h i-t test,it can be further reduced to 230 mV,which proves the high activity of OER *** promotion of OER catalytic performance can be attributed to the surface reconstruction caused by the selective element leaching and the boost of oxygen vacancy,leading to the formation of nano-scale flocculation around spinel core after the long-term OER *** work indicates a special casting process for functional materials and explores the application of rapid crystallization.

关键词： high-entropy oxide spinel OER catalysis microstructure

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