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SSRN 2024年

作者： Liang, Cheng Du, Hong-Qiang Geng, Cong Yu, Xinxin Jiang, Xiongzhuang Huang, Shangwei Long, Fei Han, Liyuan Li, Wangnan Liang, Guijie Li, Bin Cheng, Yi-Bing Peng, Yong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China College of Materials Science and Engineering Guilin University of Technology Guangxi Guilin541004 China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University Shanghai200240 China Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and Science Xiangyang441053 China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang441000 China

Years of working on perovskite solar cells (PSCs) based tandem devices and single-junction devices have approved that low annealing temperature can be beneficial of improving devices performances. In this paper, a pseudo-halogen ion engineering works well in the evaporation/spray-coating method. According to our research, it is proved that the addition of formamidine acetate (FAAc) can effectively reduce annealing temperature from 170 ℃ to 150 ℃, accelerate the maturation process of the perovskite films, and broaden the annealing window. As a result, a perovskite film with homogeneous crystallization and low residual stress is achieved, leading to extended charge carrier lifetimes, elevated photoluminescence quantum yields (PLQY), reduced Urbach energies. The corresponding PSCs prepared through evaporation/spray-coating method achieve an impressive power conversion efficiency (PCE) of 19.46%, which is the highest efficiency among wide-bandgap (WBG) PSCs fabricated by this method. And the unencapsulated devices exhibit satisfactory stability, retaining 80% of the initial PCE after 600 h of thermal aging at 60 ℃ and retaining 90% of the initial PCE after 1500 h of 50% humidity aging at 25 °C, respectively. © 2024, The Authors. All rights reserved.

关键词： Evaporation

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Improved Anti-Adhesive Wear Performance of Cu/Al Pair Via Interfacial Energy Modulation

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SSRN 2023年

作者： Lu, Tian-Tian Hua, Dong-Peng An, Bai-Ling Hafeez, Muhammad Arslan Pan, Jie Lu, Jun-Yong Zhou, Qing Zhang, Cheng Liu, Lin School of Materials Science and Engineering State Key Lab for Materials Processing and Die & Mold Technology Huazhong University of Science and Technology Wuhan430074 China School of Materials Science and Engineering State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal Materials Northwestern Polytechnical University Shaanxi Xi’an710072 China National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan430033 China

The prevention of adhesive wear between metals is challenging due to the strong adhesion forces that arise from the interaction of asperities. Here, we propose a novel approach to enhance the anti-adhesive wear performance of Cu/Al pair through interfacial energy modulation, with potential applications in electromagnetic railgun. Our findings indicate that the interfacial energy of the Cu-Al pair can be significantly reduced by magnetron sputtering a W thin film onto the Al alloy surface. A lower coefficient of friction and a substantial alleviation in adhesion and mechanical damage of the Cu alloy are thus obtained. Molecular dynamics simulations reveal that the immiscibility and low interfacial energy of the Cu/W pair result in the formation of an amorphous interfacial layer during friction, facilitating countermotion at the contacting surfaces, thus in turn enables the low friction. This study provides a guideline for designing novel wear-resistant pairs based on interfacial energy modulation. © 2023, The Authors. All rights reserved.

关键词： Adhesives

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Enhancing Lithium Metal Battery Performance Through Reaction Center Shifting in Partially Fluorinated Electrolytes with Localized High Anion Concentration

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SSRN 2023年

作者： Yang, Tong Zhang, Wenna Shen, Chunli Ren, Long Liao, Xiaobin Guo, Yaqing Zhao, Yan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Science and Technology Wuhan430070 China The Institute of Technological Sciences Wuhan University Wuhan Hubei430072 China College of Materials Science and Engineering Sichuan University Chengdu610065 China Wuhan University China College of Chemistry and Materials Engineering Wenzhou University Wenzhou325035 China State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

The design of a compatible electrolyte is crucial for achieving long-lifespan in lithium-metal batteries (LMBs). In this study, we report on a partially fluorinated electrolyte characterized by a weak solvation interaction of Li+ and a localized high anion concentration in the first solvation shell. This unique solvation structure shifts the reaction centers from solvent molecules to anions, enabling the predominant participation of anions in the formation of a LiF-rich solid-electrolyte interphase (SEI). Electrochemical experiments demonstrate efficient Li+ transfer kinetics, reduced Li nucleation overpotential polarization (28 mV), and extended cycling life in Li||Li cells using the partially fluorinated electrolyte. When tested in Li||NCM811 cells, the designed electrolyte delivers a capacity retention of 89.30% and exhibits a high average Coulombic efficiency of 99.80% over 100 cycles with a charge-potential cut-off of 4.6 V vs. Li/Li+ under the current density of 0.4 C. Furthermore, even at a current density of 1C, the cells maintain 81.90% capacity retention and a high average Coulombic efficiency of 99.40% after 180 cycles. This work underscores the significance of weak-solvation interaction in partially fluorinated electrolytes and highlights the crucial role of solvent structure in enabling the long-term stability and high-energy density of LMBs. © 2023, The Authors. All rights reserved.

关键词： Density functional theory

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Research on the Influence of Thermal Barrier Coating on the Combustion and Emission Performance of Propanol Diesel Blended Fuel

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SSRN 2024年

作者： Fei, Chunguang Shu, Zihao Yang, Ziming Zhu, Siwei Du, Yuxuan Wang, Xinyu Liu, Lu Qian, Zuoqin School of Naval Architecture Ocean and Energy Power Engineering Wuhan University of Technology Wuhan430063 China State Key Labof Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Mechanical Engineering Beijing Institute of Technology Beijing100081 China Dongfeng Commercial Vehicle Technology Center Wuhan430056 China

In the context of the current energy shortage and environmental pollution, the use of alternative fuels to reduce the consumption of fossil energies was becoming a trend. However, studies both domestically and internationally had shown that the high latent heat of vaporization and low cetane number characteristic of alcohol fuels greatly affected the fuel's atomization, evaporation, and combustion performance. This paper utilized the insulating effect of thermal barrier coatings to increase the temperature inside the cylinder, using this method to offset the impact of alcohol. Experimental results indicate that the addition of propanol extended the ignition delay period and shortened the combustion duration. The use of thermal barrier coatings countered the effect of propanol, thereby enhancing the engine's fuel atomization and combustion efficiency, and increasing the engine's thermal efficiency. The thermal efficiency increased by a maximum of 1.41%, while the combination of propanol-blended fuel and thermal barrier coatings resulted in an 18% reduction in particulate matter emissions. © 2024, The Authors. All rights reserved.

关键词： Diesel engines

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In situ synthesis of a porous high-Mn and high-Al steel by a novel two-step pore-forming technique in vacuum sintering

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Journal of materials Science & technology 2020年第4期39卷 82-88页

作者： Chuanbing Zhuang Zhigang Xu Shangyu Huang Yu Xia Chuanbin Wang Qiang Shen Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center for Green Precision Materials Forming Wuhan University of TechnologyWuhan 430070China

In this work, a novel in-situ two-step pore-forming process in vacuum sintering(ITPVS) technique combining low-temperature processing to produce open pores through the interdiffusion among the intrinsic components in the base steel, and subsequent high-temperature processing to further improve the porosities by the sublimation of Mn via previously formed open pores, was proposed to produce a lab.scale porous Fe Mn Al steel. For the first time, a high-Mn and high-Al steel with open and overall porosities of ~59.6 vol.% and ~63.7 vol.%(percent in volume, vol.%) was synthesized by isothermal holding of the quaternary elemental Fe/Mn/Al/C powder mixture at 640℃ for 1 h and the subsequent sintering at 1200℃ for 1 h. Elemental Al partly incorporated into/reacted with α-Fe and α-Mn after sintering at640℃ for 1 h, leading to the overall and open porosities promoting by ~26.6 vol.% and ~25.6 vol.%. After sintering at 1200℃, Fe Mn Al steel with increased porosities mainly comprising of austenite and α-Fe obtained. The compression strength and corresponding strain of the 1200℃-sintered porous specimen without crack on the surface was ~75 MPa and ~25%. The ITPVS technique takes advantage of using the intrinsic components like Al, Mn and Fe in steels to produce porous structure. This is beneficial to avoiding the contamination of the Fe Mn Al steel matrix caused by the employment of the foreign pore-forming agents.

关键词： Porous metal High manganese steel Two-stage sintering Reaction-diffusion Sublimation method

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3D Positioning and Robot Assembly Method for Multi-plane Workpiece

3D Positioning and Robot Assembly Method for Multi-plane Wor...

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IEEE International Conference on Real-time Computing and Robotics (RCAR)

作者： Ruoyu Jia wKai Zhong Jintao Huang Xi Li Ruifeng Li Hua Luo Zhongwei Li State Key Lab. of Materials Processing and Die and Mould School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Xi’an Saineng Aerospace Automation Technology Co. Ltd. Xi’an China

Aiming at the assembly of workpieces with multiple plane structures, this paper proposes a 3D visual positioning and robot assembly method. First, several planes are extracted by plane detection and outlier removal algorithms; then the poses of the plane point clouds are calculated by the oriented bounding box algorithm; finally, the target plane is found through the length and width constraints. Based on proper hand-eye calibration and motion planning, the method can achieve the workpieces’ recognizing, positioning and assembly accurately, meanwhile has high computational efficiency and strong robustness. As shown in the experiment results, for the recognition and positioning accuracy, the translation error of the proposed method is less than 0.2mm, and the rotation error is less than 0.2°; for the robot assembly accuracy, the translation error of the proposed method is less than 0.8mm and the rotation error is less than 0.4°. Therefore, the proposed method can successfully satisfy the requirement of robot assembly tasks.

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Achieving Enhanced Strength Retention in Ultrafine-Fibrous Interconnected Al-Based Ternary Eutectic Alloy at Elevated Temperatures

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SSRN 2023年

作者： Gan, Zhanghua Li, Yingyu Zhang, Penghui Wu, Chuandong Shen, Shuai Huang, Yuanyuan Zhong, Songqiang Yang, Tian Luo, Guoqiang Liu, Jing State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Hubei Wuhan430081 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China College of Materials Science and Engineering Shenzhen University Shenzhen518000 China

Certain two-phase regions with coarse structure could be usually detected concurrently along with three-phase eutectics in ternary eutectic alloy, leading to the formation of heterogeneous structure with limited ductility. In this study, Al-Ce-Ni eutectic alloy was chosen as modal system, which was firstly reported to be solidified under super-gravity field with high volume fraction of three-phase eutectics. Meanwhile, the formation of ultrafine-fibrous interconnected Al11Ce3-Al3Ni eutectic clusters with more "chains" and higher spatial connectivity was detected mainly due to the relatively higher nucleation rate. The high volume fraction and refinement of interconnected Al11Ce3-Al3Ni eutectic clusters with excellent thermal stability could contribute to enhancement of ductility and tensile strength at elevated-temperature. Interestingly, the strength retention at 300 oC and 400 oC were able to reach up to ~68.1 % and ~33.2 %, respectively. © 2023, The Authors. All rights reserved.

关键词： Solidification

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Chemically Bonded Interface Construction of Covalent Organic Framework/CsPbBr3 Heterojunction for Efficient Photocatalytic CO2 Reduction Driven by Visible Light

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SSRN 2024年

作者： Zhou, Min Wang, Zhiqing Mei, Aohan Chen, Keqiang Zeng, Jianrong Liu, Yueli Chen, Wen State Key Laboratory of Silicate Materials for Architectures School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park Wuhan University of Technology Sanya572024 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430074 China Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai201204 China

Effective interface interaction is the key factor to improve the photocatalytic performance due to its rapid interfacial charge transport. However, the complex organic synthesis environment and abundance surface ligands for most metal halide perovskites (MHPs) nanocrystals make it difficult to realize the strong interface interaction and rapid carrier transfer. Herein, the covalent organic framework (COF)/CsPbBr3 catalyst is constructed by in-situ growth method in HBr solvent. The Pb-N coordination acts as an electron delivery channel, guiding the transport of photogenerated carrier and enabling the effective separation of the photoexcited electron-hole pairs, thereby enhancing the performance of CO2 photoreduction. The photocatalytic efficiency of TpBpy/CsPbBr3 heterojunctions reaches up to 239.46 μmol·g–1 h–1 (CO) under the visible light irradiation, which is significantly higher than that of TpBpy and CsPbBr3 NCs. This work demonstrates a potential strategy for the construction of COF/MHPs heterojunction with strong interface interaction, which has great potential in various photocatalytic applications. © 2024, The Authors. All rights reserved.

关键词： Metal halides

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Novel hollow Ni0.33Co0.67Se nanoprisms for high capacity lithium storage

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Nano Research 2019年第6期12卷 1371-1374页

作者： Shaohua Zhu Cheng Chen Pan He Shuangshuang Tan Fangyu Xiong Ziang Liu Zhuo Peng Qinyou An Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

In this work,homogeneous Ni0.33Co0.67Se hollow nanoprisms were synthesized successfully in virtue of Kirkendall *** is the first time for bimetallic Ni-Co compounds Ni0.33Co0.67Se to be used in lithium-ion batteries (LIBs).Impressively,the Ni0.33Co0.67Se hollow nanoprisms show superior specific capacity (1,575 mAh/g at the current density of 100 mA/g) and outstanding rate performance (850 mAh/g at 2,000 mA/g) as anode material for *** work proves the potential of bimetallic chalcogenide compounds as high performance anode materials for LIBs.

关键词： Ni0.33Co0.87Se hollow nanoprisms anodehigh capacity lithium-ion batteries

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S‐Scheme 2D/2D Bi_(2)MoO_(6)/BiOI van der Waals heterojunction for CO_(2) photoreduction

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Chinese Journal of Catalysis 2022年第7期43卷 1657-1666页

作者： Zhongliao Wang Bei Cheng Liuyang Zhang Jiaguo Yu Youji Li S.Wageh Ahmed A.Al‐Ghamdi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074HubeiChina College of chemistry and chemical engineering Jishou UniversityJishou 416000HunanChina Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Reducing CO_(2) to hydrocarbon fuels by solar irradiation provides a feasible channel for mitigating excessive CO_(2) emissions and addressing resource ***,severe charge recombi‐nation and the high energy barrier for CO_(2) photoreduction on the surface of photocatalysts com‐promise the catalytic ***,a 2D/2D Bi_(2)MoO_(6)/BiOI composite was fabricated to achieve improved CO_(2) photoreduction *** transfer in the composite was facilitated by the van der Waals heterojunction with a large‐area *** function calculation demon‐strated that S‐scheme charge transfer is operative in the composite,and effective charge separation and strong redox capability were revealed by time‐resolved photoluminescence and electron para‐magnetic resonance ***,the intermediates of CO_(2) photoreduction were identi‐fied based on the in situ diffuse reflectance infrared Fourier‐transform *** functional theory calculations showed that CO_(2) hydrogenation is the rate‐determining step for yielding CH_(4) and *** Bi_(2)MoO_(6) into the composite further decreased the energy barrier for CO_(2) photoreduction on BiOI by 0.35 *** study verifies the synergistic effect of the S‐scheme heterojunction and van der Waals heterojunction in the 2D/2D composite.

关键词： 2D/2D S‐scheme heterojunction van der Waals heterojunction CO_(2)photoreduction

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