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具有自适应机械弹性的纳米纤维互锁多孔石墨烯复合气凝胶用于高度可逆的无枝晶锂金属负极

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Science China Materials 2023年第8期66卷 3065-3074页

作者：冯之欣莫璐璐陈开钱雨姗张镭骞杨升元 Roohollah Bagherzadeh 赖飞立樊玮张超缪月娥刘天西 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua UniversityShanghai 201620China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China advanced Fibrous Materials LAB Institute for Advanced Textile Materials and Technologies(ATMT)School of Advanced Materials and ProcessesAmirkabir University of TechnologyTehranIran Department of Chemistry KU LeuvenCelestijnenlaan 200FLeuven 3001Belgium

具有最高理论容量的锂金属被认为是下一代高能量密度电池中最有前景的负极,但长循环过程中的锂枝晶生长和负极的体积膨胀阻碍着其实际应用.尽管已有研究使用石墨烯气凝胶等三维主体用于容纳锂金属,但单一的石墨烯气凝胶难以承受充放电... 详细信息

具有最高理论容量的锂金属被认为是下一代高能量密度电池中最有前景的负极,但长循环过程中的锂枝晶生长和负极的体积膨胀阻碍着其实际应用.尽管已有研究使用石墨烯气凝胶等三维主体用于容纳锂金属,但单一的石墨烯气凝胶难以承受充放电过程中负极的大体积变化.因此,本文制备了具有自适应机械弹性的聚酰亚胺纳米纤维互锁多孔石墨烯复合气凝胶(PI-HGCA),将其作为复合主体结构用于容纳锂金属.具有面内纳米孔的多孔石墨烯纳米片可以有效地调节锂离子通量并提供高度定向的离子转移路径.此外,三维复合气凝胶主体由水平排列的多孔石墨烯片层和互锁的聚酰亚胺纳米纤维构成,其在长期循环过程中对负极的体积变化表现出高度可逆的自适应压缩弹性.预锂化的PI-HGCA负极在对称电池中显示出极低的过电势(46 mV),并具有1300次的长循环寿命;其与LiFePO_(4)正极所组装而成的全电池在1 C下经过800次循环后仍然显示出81.2%的超高容量保持率,表明该互锁气凝胶复合结构在高能量密度锂金属电池中具有巨大应用潜力.

关键词：长循环寿命水平排列理论容量复合气凝胶高能量密度石墨烯纳米片聚酰亚胺复合结构

Finite-time Stability of Discrete-time Switched Positive Linear Systems

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Finite-time Stability of Discrete-time Switched Positive Lin...

第32届中国控制与决策会议

作者： Wang Xuefei Wen Jiwei Key Laboratory of advanced Process Control for Light Industry（Ministry of education） School of Internet of Things EngineeringJiangnan University

This paper investigates finite-time stability（FTS） for discrete-time switched positive linear systems（DSPLSs） subject to average dwell time switching by employing multiple linear copositive Lyapunov functions（MLCLFs）.MLCLFs are taken in non-quadratic form by using positive states of SPLSs to compensate general results of common quadratic Lyapunov *** conditions of FTS for DSPLSs are *** illustrative example is given to demonstrate the effectiveness of the proposed method.

关键词： Discrete-time switched positive linear systems finite-time stability average dwell time multiple linear copositive Lyapunov function

Whispering Gallery Mode Resonances of Perovskite Nanoplatelets

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Whispering Gallery Mode Resonances of Perovskite Nanoplatele...

第四届新型太阳能电池学术研讨会

作者： Guohui Li Weimin Kong Qiangbing Liang Xingqi Ji Ting Ji Yuying Hao Yanxia Cui Key Laboratory of advanced Transducers and Intelligent Control System (Ministry of education) College of Physics and Optoelectronics Taiyuan University of Technology

Organic-inorganic hybridized perovskites have attracted more and more attention due to their advantages such as high absorption coefficients, direct band-gap, long carrier lifetimes, balanced electron/hole mobility, ***-scaled perovskites, which possess naturally-formed optical feedback, can excite resonance under certain incident light and realize the precise light management as *** 2014, Ha et *** lead halide perovskite nanoplatelets with regular triangular or hexagonal morphologies by vapor phase deposition techniques on mica plate [1].Later, they realized lasing based on the whispering-gallery modes at the near-infrared range using the prepared perovskite nanoplatelets [2].Here, we first synthesized lead iodide nanoplatelets with well-defined crystal boundaries and then successfully conversed the pre-grown lead iodide template into perovskite nanoplatelets by placing the substrate exactly above the methyl iodide amine powder in Ar gas condition with all valves of the quartz tube *** a continuous-wave laser at 325 nm, we measured the photoluminescence spectra of different perovskite nanoplatelets and observed the whispering gallery modes over the spontaneous emission band.

关键词： Perovskite Whispering gallery mode Nanoplatelet Vapor phase Resonance

Diversity,metabolism and cultivation of archaea in mangrove ecosystems

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Marine Life Science & Technology 2021年第2期3卷 252-262页

作者： Cui-Jing Zhang Yu-Lian Chen Yi-Hua Sun Jie Pan Ming-Wei Cai Meng Li Shenzhen Key Laboratory of Marine Microbiome Engineering Institute for Advanced StudyShenzhen UniversityShenzhen518060China

Mangroves comprise a globally significant intertidal ecosystem that contains a high diversity of microorganisms,including fungi,bacteria and *** is a major domain of life that plays important roles in biogeochemical cycles in these *** this review,the potential roles of archaea in mangroves are briefly ***,the diversity and metabolism of archaeal community of mangrove ecosystems across the world are summarized and Bathyarchaeota,Euryarchaeota,Thaumarchaeota,Woesearchaeota,and Lokiarchaeota are confirmed as the most abundant and ubiquitous archaeal *** metabolic potential of these archaeal groups indicates their important ecological function in carbon,nitrogen and sulfur ***,some cultivation strategies that could be applied to uncultivated archaeal lineages from mangrove wetlands are suggested,including refinements to traditional cultivation methods based on genomic and transcriptomic information,and numerous innovative cultivation techniques such as single-cell isolation and high-throughput culturing(HTC).These cultivation strategies provide more opportunities to obtain previously uncultured archaea.

关键词： Archaea Mangroves Cultivation Diversity Metabolisms

Hollow sphere of heterojunction(NiCu)S/NC as advanced anode for sodium-ion battery

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Journal of Energy Chemistry 2023年第7期82卷 248-258,I0006页

作者： Hongyi Chen Pengfei Lv Pengfu Tian Shiyue Cao Shengjun Yuan Qiming Liu Key Laboratory of Artificial Micro-and Nano-structures of Ministry of education School of Physics and TechnologyWuhan UniversityWuhan 430072HubeiChina

Metal sulfide is considered as a potential anode for sodium-ion batteries(SIBs),due to the high theoretical capacity,strong thermodynamic stability and ***,their cycle capacity and rate performance are limited by the excessive expansion rate and low intrinsic ***,heterogeneous hollow sphere NiS-Cu_(9)S_(5)/NC(labeled as(NiCu)S/NC)based on Oswald ripening mechanism was prepared through a simple and feasible *** a structural perspective,the hollow structure provides an expansion buffer and raises the electrochemical active *** terms of electron/ion during the cycles,Na^(+)storage mechanism is optimized by NiS/Cu_(9)S_(5)heterogeneous interface,which increases the storage sites and shortens the migration path of Na^(+).The formation of built-in electric field strengthens the electron/ion *** on the first principle calculations,it is further proved the formation of heterogeneous interfaces and the direction of electron *** the anode for SIBs,the synthesized(NiCu)S/NC delivers high reverse capacity(559.2 mA h g^(-1)at 0.5 A g^(-1)),outstanding rate performance(185.3 mA h g^(-1)at 15 A g^(-1)),long-durable stability(342.6 mA h g^(-1)at 4 A g^(-1)after 1500cycles,150.0 m A h g^(-1)at 10 A g^(-1)after 20,000 cycles with 0.0025%average attenuation rate).The matching cathode electrode Na_(3)V_(2)(PO_(4))_(3)/C is assembled with(NiCu)S/NC for the full-battery that achieves high energy density(253.7 W h kg^(-1))and reverse capacity(288.7 mA h g^(-1)).The present work provides a distinctive strategy for constructing electrodes with excellent capacity and stability for SIBs.

关键词： Hollow structure Heterogeneous interface First principle calculations Sodium-ion batteries

Multi-time Scale Hierarchical Predictive Control for Energy Management of Microgrid System with Smart Users

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Multi-time Scale Hierarchical Predictive Control for Energy ...

第26届中国控制与决策会议

作者： Jun Xu Yuanyuan Zou Yugang Niu Key Laboratory of advanced Control and Optimization for Chemical Processes Ministry of EducationEast China Univ.of Science and Technology Key Laboratory of System Control and Information Processing Ministry of Education

In this paper, a multi-time scale hierarchal model predictive control strategy is proposed to optimize energy management problem of a microgrid with multiple smart users. According to the power flow among different energy modules, a hierarchical system model and a multi-time scale hierarchal energy optimization management problem are established. The centralized controller in the upper layer is to optimize the charge/discharge time and energy of storage devices, controllable supply power adjustment and dispatch of the aggregators. The optimization problem in the lower layer is to meet users’ demands in real time. Meanwhile, in order to improve the disturbances caused by the randomness of renewable energy and variant loads, a multi-time scale optimization scheme is applied. At the slow scale, the upper optimization problem is solved, and the optimal energy scheduling in the long-term can be achieved. At the fast scale, the energy balance between supply and demand of smart users can be realized in the short-term. Finally, simulation results illustrate the effectiveness of proposed method.

关键词： Smart user Microgrid Energy management Multi-time scale time-hierarchal Model predictive control

Vertical drainage capacity of new electrical drainage board on improvement of super soft clayey ground

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Journal of Central South University 2015年第10期22卷 4027-4034页

作者：沈扬励彦德黄文君徐海东胡品飞 Key Laboratory of Ministry of education for Geomechanics and Embankment Engineering Hohai University Huahong Full Electro-osmosis Technologies Co. Ltd

As an advanced polymer composites electro-kinetic geosynthetics, the electro-osmotic vertical drainage(EVD) board could drain water quickly and accelerate consolidation process. However, the drainage rate was mainly impacted by the vertical drainage capability. Therefore, vertical drainage capability at the top of EVD board was theoretically analyzed. Basic requirements for drainage at the top of the board were summed up, as well as the formula of anode pore pressure when losing the vertical drainage capability. Meanwhile, a contrast test on the top and bottom drainage capacities was conducted. In use of the advanced EVD board, the voltage potential and pore pressure of anode were measured. Moreover, the derived formulas were verified. The result shows that the decrease of electric force gradient had an observable impact on the drainage capability. There was nearly no difference between the energy consumption for the two drainage methods. Although a little less water was discharged, the top drainage method had more advantages, such as high initial drainage velocity, few soil cracks, low anode water content and high soil strength. All of these show that the super soft soil ground could be consolidated quickly in use of the advanced EVD board through the top drainage. The top drainage method could efficiently improve the drainage effect, decrease the energy consumption and speed up the project proceeding.

关键词： electro-osmotic vertical drainage(EVD) board vertical drainage capacity potential gradient pore pressure around anode

Microstructure and mechanical properties of cast Mg-15Al-xNd alloy by permanent mold

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China Foundry 2013年第5期10卷 315-320页

作者： Zhou Kangkang Wang Hongxia Liang Wei Zhang Jinshan Zhang Hongxia College of Materials Science and Engineering Taiyuan University of Technology Key Laboratory of Interface Science and Engineering in advanced Materials

To improve the comprehensive mechanical properties of Mg-15AI magnesium alloy, different amounts （from 0 to 4.0wt.%） of Nd were added to the alloy and six Mg-15AI-xNd alloys were prepared by metal mould casting. The effect of Nd content on microstructure of the alloys was investigated by means of OM, SEM, EDS, TEM, and XRD. The tensile properties were tested at room temperature （RT） and high temperature （473 K）. The results indicate that the primary a-Mg dendrite is significantly refined with the addition of Nd. The best refinement is reached at 1.0wt.% Nd content and the average dendrite arm spacing decreases from 80- 100 pm （without Nd addition） to -20 pm. A further increase in Nd content leads to the coarsening of the primary a-Mg dendrite. The addition of Nd improves the tensile properties of Mg-15AI both at RT and 473 K. The Mg-15AI alloy containing 1.0wt.% Nd exhibits the best tensile properties. Compared with the alloy without Nd, the yield and ultimate tensile strength of the Mg-15AI-1.0Nd alloy at RT increase from 132.3 to 148.6 MPa and 152.3 to 189.6 MPa, increase by 12.3% and 24.5%, respectively; and the elongation at RT increases from 0.05 % to 1.24%. The yield and tensile strength of the alloy at 473 K increase from 97.9 to 115.3 MPa and 121.6 to 140.1 MPa, increase by 15.2% and 20%, respectively. Further increment of Nd content to 1.5wt.% degrades the tensile properties, which is ascribed to grain coarsening and growth of the AI-Nd phase.

关键词： Mg-15Al magnesium alloy microstructure mechanical properties

The Impact of SARS-CoV-2 on Liver Diseases and Potential Phytochemical Treatments

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Infectious Microbes & Diseases 2024年第4期6卷 177-188页

作者： Dhanvee Balaji Ranjith Balakrishnan Dhasarathdev Srinivasan Rajasekaran Subbarayan Rupendra Shrestha Nityanand Srivastava Ankush Chauhan Centre for advanced Biotherapeutics and Regenerative Medicine Faculty of ResearchChettinad Hospital and Research InstituteChettinad Academy of Research and EducationKelambakkamIndia Centre for Herbal Pharmacology and Environmental Sustainability Faculty of Allied Health SciencesChettinad Hospital and Research InstituteChettinad Academy of Research and EducationKelambakkamIndia Research and Collaboration Anka AnalyticaMelbourneAustralia External Consultant Independent ResearcherPittsfieldMassachusettsUSA Department of Cell Biology Albert Einstein College of MedicineNew YorkUSA.

The COVID-19 pandemic,caused by the SARS-CoV-2 virus,has brought about numerous *** of these challenges is the impact of SARS-CoV-2 on the *** this virus primarily affects the lungs,it can induce elevated transaminase levels and the development of scar tissue in the liver,exacerbating preexisting liver *** with preexisting conditions,such as nonalcoholic fatty liver disease,alcohol-induced liver disease and hepatocellular carcinoma,face an increased risk of mortality from ***,drugs currently used to treat COVID-19 have undesirable side effects,which make them unsuitable for patients with preexisting liver *** this review,we explore the potential of phytochemicals,such as apigenin,berberine,curcumin,epigallocatechin-3-gallate,quercetin,resveratrol and silymarin,for treatment of the liver conditions,including nonalcoholic fatty liver disease,alcohol-induced liver disease and hepatocellular *** also discuss significant associations between phytochemicals and COVID-19 by depicting their molecular *** on the discussed overlapping functions,it is important to assess the therapeutic efficacy of phytochemicals that possess hepatoprotective properties as potential alternative treatments for COVID-19.

关键词： COVID-19 nonalcoholic fatty liver disease alcohol-induced liver injury hepatocellular carcinoma phytochemicals hepatoprotective