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Thermal Stability and Degeneration Behavior of Solar Selective Absorber Based on WTi-Al_(2)O_(3)Cermet

Journal of Wuhan University of technology(Materials Science) 2024年第6期39卷 1555-1564页

作者： WANG Xiaobo FANG Wei MA Yuchao CHENG Xudong LI Kewei Department of Physics and Electronic Engineering Jinzhong UniversityJinzhong 030619China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China State Key Laboratory of Advanced Technology for Materials Synthesis and Progressing Wuhan University of TechnologyWuhan 430070China

A WTi-Al_(2)O_(3)cermet-based solar selective absorber was prepared to investigate the atomic diffusion induced spectral selectivity *** as-deposited coating exhibits superior absorptance(0.934)and low thermal emittance(0.098),as well as excellent thermal stability with a selectivity of 0.900/0.07 even after annealing at 923 K for 400 h in Ar ***,the multilayer coating failed after being subjected to annealing at 923 K for 400 h in an air environment,as indicated by a decrease in solar absorptance to 0.912 and an increase in thermal emittance to *** microstructure characterizations reveal that the annealed coating exhibits a columnar morphology along the vertical direction of the *** presence of abundant grain boundaries in the multilayer coating promotes the outward diffusion of Cr and Mn atoms in the stainless-steel *** Mn atoms,in particular,possess the capability to migrate towards the surface of the coating and undergo an oxidation reaction with oxygen,facilitating the formation of a thick Mn_(2)O_(3)*** roughness of the coating surface was significantly increased in this case,adversely affecting solar absorptance due to amplified sunlight *** addition,the rocketing of thermal emittance is attributed to the destabilization of W infrared reflective layer during the *** findings highlight the importance of considering the outward diffusion of Mn and Cr elements in the stainless-steel substrate when optimizing solar selective absorbers.

关键词： solar selective absorber thermal stability spectral selectivity optical properties

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Design of Power Supply for FRC Plasma Thruster Driven by Pulsed RMF

Design of Power Supply for FRC Plasma Thruster Driven by Pul...

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2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Zhang, YiSong Yang, Yong Huang, Yuxuan Yi, Xiaopeng Lv, Chaofan Rao, Bo Lv, Fangwei Zhang, Ming School of Electrical and Electronic Engineering Huazhong University of Science and Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Technology Wuhan430074 China

ISBN: (纸本)9798331530174

The Field-reversed configuration (FRC) plasma thruster is a propulsion device driven by Pulsed Rotating magnetic field (RMF) to generate thrust. An FRC plasma thruster prototype has been built. The RMF antennas are designed with very high parameters namely a peak current of 4 kA, a resonant frequency of 150 kHz. Thus, a high voltage, high current pulsed power supply is required to satisfy the design. This article mainly presents the challenges and solutions in the design of the power supply system. First, 4 sets of power supplies are used to feed the RMF coils, which results in design parameters of 4 kA/3.5 kV for each power supply. Then, stray parameters control and loss analysis were done to improve power supply efficiency. Experimental tests are also performed on the system. In conclusion, the designed power supply system can satisfy the requirements of high operation parameters and high controllability. © 2024 IEEE.

关键词： Pulsed plasma thrusters

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Remaining Useful Life Prediction of Li-Ion Batteries by Multi-modal Attention Fusion Network

Remaining Useful Life Prediction of Li-Ion Batteries by Mult...

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2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Sha, Wuxin Cheng, Danpeng Han, Qigao Guo, Yaqing Du, Baoshuai Cheng, Shijie Cao, Yuan-Cheng School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China State Grid Shandong Electric Power Research Institute Jinan250003 China

ISBN: (纸本)9798331530174

Lithium-ion batteries are crucial for electric vehicles and smart grids, yet their performance degrades with charge-discharge cycles, leading to reduced capacity and increased resistance. Predicting the Remaining Useful Life (RUL) is essential for preventing failures and ensuring stable operation. However, estimating RUL is challenging due to its indirect measurability and the influence of various factors such as battery components, packaging processes, and operating conditions. This paper presents a Multimodal Attention Fusion Neural Network (MAFN) to forecast battery health and RUL using historical data. Trained on a diverse electrochemical dataset with various battery components and cycling conditions, the model integrates battery materials and electrical signals, capturing critical aging features for accurate RUL prediction. This approach advances rapid RUL estimation, enhancing battery management systems and supporting smart grid and carbon neutrality goals. © 2024 IEEE.

关键词： Lithium-ion batteries

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Island-Oriented Multi-Energy Reef Pan Power Plant and Its Application - Layout Optimization Study and Capacity Exploration

Island-Oriented Multi-Energy Reef Pan Power Plant and Its Ap...

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2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： He, Weijie Wei, Fanrong Lin, Xiangning Dawoud, Samir M. School of Electrical and Electronic Engineering Huazhong University of Science and Technology The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China Tanta University The Department of Electrical Power and Machines Engineering Tanta Egypt

ISBN: (纸本)9798331530174

In response to the problem of unreasonable power supply layout on islands, this paper fully evaluates the status of wind/light/wave energy resources in the island and its surrounding reef area scenarios. Then, based on bladeless wind turbines, floating solar panels and oscillating float wave energy capture devices, an integrated construction layout plan for multi-energy reef power stations was proposed. And with the maximum annual total power generation as the objective function, a layout optimization and capacity exploration model was established. The CPLEX mixed integer programming algorithm was used to solve the model example. The example results show that the construction layout plan proposed in this paper is reasonable and feasible, and has unique advantages in island scenarios. © 2024 IEEE.

关键词： Reefs

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Cycling performance of layered oxide cathode materials for sodium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1720-1744页

作者： Jinpin Wu Junhang Tian Xueyi Sun Weidong Zhuang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory for Green Recovery and Extraction of Rare and Precious Metals University of Science and Technology BeijingBeijing 100083China

Layered oxide is a promising cathode material for sodium-ion batteries because of its high-capacity,high operating voltage,and simple *** performance is an important criterion for evaluating the application prospects of ***,facing challenges,including phase transitions,ambient stability,side reactions,and irreversible anionic oxygen activity,the cycling performance of layered oxide cathode materials still cannot meet the application ***,this review proposes several strategies to address these ***,bulk doping is introduced from three aspects:cationic single doping,anionic single doping,and multi-ion ***,homogeneous surface coating and concentration gradient modification are *** addition,methods such as mixed structure design,particle engineering,high-entropy material construction,and integrated modification are ***,a summary and outlook provide a new horizon for developing and modifying layered oxide cathode materials.

关键词： sodium-ion battery layered oxide materials cycling performance bulking doping surface coating concentration gradient mixed structure high-entropy

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advanced high-entropy alloys breaking the property limits of current materials

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Journal of Materials Science & technology 2024年第19期186卷 219-230页

作者： Dongyue Li Peter K.Liaw Lu Xie Yong Zhang Wenrui Wang School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN 37996USA Beijing Advanced Innovation Center of Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China

The growing need for stronger and more ductile structural materials has spurred an intense search for innovative,high-performance ***,alloys face a pervasive trade-off:high strength often comes at the expense of ductility and vice *** advent of high-entropy alloys(HEAs)offering both high strength and ductility has transformed this *** this work,we discuss the deformation mechanisms of HEAs,examine the foundations of the strength-ductility trade-off,and explore approaches for designing HEAs to surmount this ***,we analyze the factors that govern HEA-deformation performance,which in turn influence the HEA *** also propose a perspective on future research directions concerning the mechanical behavior of HEAs,highlighting potential breakthroughs and novel strategies to advance the field.

关键词： High-entropy alloy Strength-ductility Trade-off Microstructure Deformation mechanism

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Long-Lasting Filtration of Oily Water by Anti-Fouling Underwater Oleophobic Sand Particles

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Journal of Bionic engineering 2024年第2期21卷 913-923页

作者： Xingyu Liu Junxu Chen Rui Wang Yifan Su Zhangheng Zhou Zezhong Hou Zhuoran Li Junhao Zhao Weicai Shi Xinquan Yu Zhaopeng Yu Youfa Zhang State Key Laboratory of Advanced Technology for Float Glass CNBM Research Institute for Advanced Glass Materials Group Co.LtdBengbu233000China Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing211189China Research Institute of Petroleum Engineering Technology of Jiangsu Oilfield Yangzhou225009China Kunshan Industrial Technology Research Institute Kunshan215300SuzhouChina School of Automotive Engineering Changshu Institute of TechnologyChangshu215500SuzhouChina

The produced water from the oilfield was purified with filter material and then injected back into the *** serpentine filter material was easy to harden with the increase in filtration amount,which affected the water quality.A superhydrophilic/underwater oleophobic serpentine filter material was successfully prepared by a simple method of coating modification,which exhibited long-lasting filtration of oily water,good filtration and anti-fouling properties,and resistance to *** film-forming material of the superhydrophilic/underwater oleophobic coating was composed of SiO_(2) particles with small size,which could completely and evenly cover the filter *** weight loss was only 7.6%after mechanical stirring for 90 *** with the original filter material,the superhydrophilic/underwater oleophobic serpentine filter material showed a better anti-fouling ability and resistance to *** filtration of crude oil emulsion and oil slick sewage showed a better backwashing *** 35 cycles of continuous filtration of suspended solids in wastewater,the backwashing rate reached 78.4%.The results provided an effective method for the filtration of oily wastewater in the oilfield.

关键词： Serpentine Underwater oleophobic Water immersion resistance Anti-fouling Hardening resistance

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Lightweight Si_(3)N_(4)@SiO_(2) ceramic foam for thermal insulation and electromagnetic wave transparency

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Nano Research 2024年第5期17卷 4298-4306页

作者： Zongwei Tong Xiangjie Yan Yuexiang Wang Kexun Li Weihai Ma China-Blarus Belt and Road Joint Laboratory on Electromagnetic Environment Effect the 33rd Research Institute of ChinaElectronics Technology Group CorporationTaiyuan 030032China Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education School of Material Science and EngineeringTianjin UniversityTianjin 300072China Department of Materials Science and Engineering Jinzhong UniversityJinzhong 030619China

Increasing porosity is one of the most direct ways to improve the thermal insulation and dielectric properties of *** now,many wet methods for preparing Si_(3)N_(4) ceramic foams usually face the problems of complex rheology,long period,and expensive cost,and the reported pore sizes of Si_(3)N_(4) ceramic foams are typically micron-grade,resulting in a lack of competitiveness in thermal insulation and wave-transparent *** this paper,the Si_(3)N_(4)@SiO_(2) ceramic foams were prepared using an efficient dry-method,which combined three processes of low temperature chemical vapor deposition(LTCVD),template,and isostatic *** method has the advantages of simple operation and short preparation period,and can realize near-net size molding and mass *** addition,the evolution mechanisms of honeycomb microstructure and composition of Si_(3)N_(4)@SiO_(2) ceramic foam during sintering were studied by chemical reaction *** as-prepared Si_(3)N_(4)@SiO_(2) ceramic foam possesses low density(0.377 g·cm^(-3)),high compressive strength(7.5 MPa),low thermal conductivity(0.0808 W·m^(-1)·K^(-1)),and excellent dielectric properties(ε<1.32,tanδ<0.009)in the frequency range of 8-18 GHz,and its maximum working temperature in air can reach up to 1100℃.It will be recommended to be applied in the interlayer of Si_(3)N_(4) ceramic radome to improve its thermal insulation and electromagnetic wave transparency performances.

关键词： silicon nitride ceramic foam honeycomb microstructure dielectric properties thermal insulation

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Switching Frequency Improvement of a High Speed on/off Valve Based on Pre-excitation Control Algorithm

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Chinese Journal of Mechanical engineering 2024年第4期37卷 94-106页

作者： Qi Zhong Xiaotian Li Yongxin Mao Enguang Xu Tiwei Jia Yanbiao Li Huayong Yang College of Mechanical Engineering Zhejiang University of TechnologyHangzhou 310023China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology Ministry of Education and Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310023China

The high-speed on/off valve(HSV)serves as the fundamental component responsible for generating discrete fluids within digital hydraulic *** the switching frequency of the HSV increases,the properties of the generated discrete fluid approach those of continuous ***,a higher frequency response characteristic of HSV is the key to ensure the control accuracy of digital hydraulic ***,the current research mainly focuses on its dynamic performance,but neglect its *** paper presents a theoretical analysis demonstrating that the FRC of the HSV can be enhanced by minimizing its switching *** maximum switching frequency(MSF)is mainly determined by opening dynamic performance when HSV operates with low switching duty ratio(SDR),whereas the closing dynamic performance limits the MSF when HSV operates with high *** upon these findings,the pre-excitation control algorithm(PECA)is proposed to reduce the switching time of the HSV,and consequently enhance its *** results demonstrate that PECA shortens the opening delay time of HSV by 1.12 ms,the closing delay time by 2.54 ms,and the closing moving time by 0.47 ms in comparison to the existing advanced control *** a result,a larger MSF of 417 Hz and a wider controllable SDR range from 20%to 70%were achieved at a switching frequency of 250 ***,the proposed PFCA in this paper has been verified as an effective and promising approach for enhancing the control performance of digital hydraulic systems.

关键词： High speed on/off valve Switching frequency Pre-excitation Dynamic performance Switching duty ratio

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Constructing high-capacity and flexible aqueous zinc-ion batteries with air-recharging capability using organic cathodes

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Chinese Chemical Letters 2024年第3期35卷 468-472页

作者： Xiaojuan Chen Haoqi Su Baozhu Yang Xiaocen Liu Xiuting Song Lixin Su Gui Yin Qi Liu Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis Green Manufacturing Collaborative Innovation Center and School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China State Key Laboratory of Coordination Chemistry Nanjing UniversityNanjing 210093China

Flexible aqueous zinc-ion batteries(AZIBs)with air-recharging capability are a promising self-powered system applied in future wearable *** is desired to develop high-capacity air-rechargeable ***,we developed a flexible AZIB with air-recharging capability based on trinitrohexaazatrinaphthylene(TNHATN)cathode and a ZnSO_(4)*** flexible Zn//TNHATN battery exhibits high volumetric energy density(21.36 mWh/cm^3)and excellent mechanical ***,the discharged flexible Zn//TNHATN battery can be chemical self-charged via the redox reaction between TNHATN cathode and O_(2)from the *** oxidation in air for 15 h,such flexible Zn//TNHATN battery can deliver a high specific capacity of 320 mAh/g at 0.5 A/g,displaying excellent air-recharging ***,this flexible Zn//TNHATN battery also works well in chemical or/and galvanostatic charging mixed modes,showing *** work provides a new insight for designing flexible aqueous self-powered systems.

关键词： Aqueous zinc-ion battery Trinitrohexaazatrinaphthylene Organic cathode materials Flexible air-rechargeable battery Self-powered system

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