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Unprecedented and highly stable lithium storage capacity of (001) faceted nanosheet-constructed hierarchically porous TiO2/rGO hybrid architecture for high-performance Li-ion batteries

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National science review 2020年第6期7卷 1046-1058页

作者： Wen-Bei Yu Zhi-Yi Hu Jun Jin Min Yi Min Yan Yu Li Hong-En Wang Huan-Xin Gao Li-Qiang Mai Tawfique Hasan Bai-Xiang Xu Dong-Liang Peng Gustaaf Van Tendeloo Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China. Institute of Materials Science Technische Universität Darmstadt Darmstadt 64287 Germany. Fundamental Research Department SINOPEC Shanghai Research Institute of Petrochemical Technology Shanghai 201208 China. Cambridge Graphene Centre University of Cambridge Cambridge CB3 0FA UK. Department of Materials Science and Engineering College of Materials Xiamen University Xiamen 361005 China. Nanostructure Research Centre Wuhan University of Technology Wuhan 430070 China.

Active crystal facets can generate special properties for various applications. Herein, we report a (001) faceted nanosheet-constructed hierarchically porous TiO/rGO hybrid architecture with unprecedented and highly stable lithium storage performance. Density functional theory calculations show that the (001) faceted TiO nanosheets enable enhanced reaction kinetics by reinforcing their contact with the electrolyte and shortening the path length of Li diffusion and insertion-extraction. The reduced graphene oxide (rGO) nanosheets in this TiO/rGO hybrid largely improve charge transport, while the porous hierarchy at different length scales favors continuous electrolyte permeation and accommodates volume change. This hierarchically porous TiO/rGO hybrid anode material demonstrates an excellent reversible capacity of 250 mAh g at 1 C (1 C = 335 mA g) at a voltage window of 1.0-3.0 V. Even after 1000 cycles at 5 C and 500 cycles at 10 C, the anode retains exceptional and stable capacities of 176 and 160 mAh g, respectively. Moreover, the formed LiTiO nanodots facilitate reversed Li insertion-extraction during the cycling process. The above results indicate the best performance of TiO-based materials as anodes for lithium-ion batteries reported in the literature.

关键词： (001) faceted TiO2 nanosheets Li2Ti2O4 crystallites porous hierarchy reduced graphene oxide unprecedented lithium storage capacity

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Hemocompatibility of Mg-Zn-Y-Nd: Fabrication of Citric Acid/RGD Multilayers on Mg-Zn-Y-Nd Alloy via Layer-by-Layer Self-Assembly for Promoting Surface Biocompatibility (Adv. Mater. Interfaces 13/2021)

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advanced materials Interfaces 2021年第13期8卷

作者： Fang Kou Changsheng Liu Liguo Wang Aqeela Yasin Jingan Li Shaokang Guan School of Materials Science and Engineering and Henan Key Laboratory of Advanced Magnesium Alloy and Key Laboratory of Materials Processing and Mold Technology (Ministry of Education) Zhengzhou University Zhengzhou 450001 China

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Sabatier Relations in Electrocatalysts Based on High-entropy Alloys with Wide-distributed d-band Centers for Li-O2Batteries

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Angewandte Chemie 2023年第44期135卷

作者： Jiaming Tian Yuan Rao Wenhui Shi Jiawei Yang Wenjie Ning Haoyu Li Yonggang Yao Haoshen Zhou Shaohua Guo College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materials National Laboratory of Solid State Microstructures Collaborative Innovation Centre of Advanced Microstructures Frontiers Science Center for Critical Earth Material Cycling Nanjing University Nanjing 210093 P. R. China Lab of Power and Energy Storage Batteries Shenzhen Research Institute of Nanjing University Shenzhen 518057 P. R. China State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

Li-O 2 battery (LOB) is a promising “beyond Li-ion” technology with ultrahigh theoretical energy density (3457 Wh kg −1 ), while currently impeded by the sluggish cathodic kinetics of the reversible gas-solid reaction between O 2 and Li 2 O 2 . Despite many catalysts are developed for accelerating the conversion process, the lack of design guidance for achieving high performance makes catalysts exploring aleatory. The Sabatier principle is an acknowledged theory connecting the scaling relationship with heterogeneous catalytic activity, providing a tradeoff strategy for the topmost performance. Herein, a series of catalysts with wide-distributed d-band centers (i.e., wide range of adsorption strength) are elaborately constructed via high-entropy strategy, enabling an in-depth study of the Sabatier relations in electrocatalysts for LOBs. A volcano-type correlation of d-band center and catalytic activity emerges. Both theoretical and experimental results indicate that a moderate d-band center with appropriate adsorption strength propels the catalysts up to the top. As a demonstration of concept, the LOB using FeCoNiMnPtIr as catalyst provides an exceptional energy conversion efficiency of over 80 %, and works steadily for 2000 h with a high fixed specific capacity of 4000 mAh g −1 . This work certifies the applicability of Sabatier principle as a guidance for designing advanced heterogeneous catalysts assembled in LOBs.

关键词： High Entropy Li-O2 Batteries Oxygen Conversion Sabatier Principle d-Band Center

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Corrigendum to “Manipulating the percolated network of nanorods in polymer matrix by adding non-conductive nanospheres: A molecular dynamics simulation” [Compos. Sci. Technol. 229 (2022) 109694]

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Composites Science and technology 2022年 230卷

作者： Haoyu Wu Ruibin Ma Yimin Wang Xiuying Zhao Liqun Zhang Yangyang Gao State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology 10029 People's Republic of China Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials Beijing University of Chemical Technology 10029 People's Republic of China

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Dislocation-induced Y segregation at basal-prismatic interfaces in Mg

arXiv

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arXiv 2020年

作者： Huang, Zhifeng Turlo, Vladyslav Wang, Xin Chen, Fei Shen, Qiang Zhang, Lianmeng Beyerlein, Irene J. Rupert, Timothy J. State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Mechanical and Aerospace Engineering University of California IrvineCA92697 United States Department of Materials Science and Engineering University of California IrvineCA92697 United States Materials Department University of California Santa BarbaraCA93106 United States

Solute segregation at twin boundaries in Mg has been widely investigated, yet this phenomenon has not been studied at the equally important basal-prismatic interfaces. To fill this critical gap, this work investigates the segregation behavior of Y at basal-prismatic interfaces with various structures using atomistic simulations. The calculated interfacial energies show that short coherent interfaces and long semi-coherent interfaces containing disconnections and dislocations are more energetically stable than disordered interfaces, which is supported by our experimental observations. The segregation energy of Y at these lowest energy basal-prismatic interfaces shows a clear correlation with the atomic hydrostatic stress, highlighting the importance of local extension stresses for segregation. In addition, sites around dislocations at the semi-coherent basal-prismatic interfaces demonstrate lower segregation energy, indicating that local defects such as interfacial dislocations can further enhance the segregation. In its entirety, this study indicates that the segregation of solutes can be affected by a number of different aspects of the local structure at complex interfaces in Mg alloys. Mg;Misfit;Segregation;Dislocation;Basal-Prismatic Interface. Copyright © 2020, The Authors. All rights reserved.

关键词： Magnesium alloys

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Graphene oxide-decorated Fe2（MoO4）3 microflowers as a promising anode for lithium and sodium storage

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Nano Research 2018年第3期11卷 1285-1293页

作者： Chunhua Han Xiaoji Ren Qidong Li Wen Luo Lei Huang Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road122 Wuhan 430070 China Laboratoire de Chimie et Physique: Approche Multiechelles des Milieux Complexes Institut Jean Barriol Universite de Lorraine57070 Metz France

Mixed transition metal oxides （MTMOs） have received intensive attention as promising anode materials for lithium-ion batteries （LIBs） and sodium-ion batteries （SIBs）. In this work, we demonstrate a facile one-step water-bath method for the preparation of graphene oxide （GO） decorated Fe2（MoO4）3 （FMO） microflower composite （FMO/GO）, in which the FMO is constructed by numerous nanosheets. The resulting FMO/GO exhibits excellent electrochemical performances in both LIBs and SIBs. As the anode material for LIBs, the FMO/GO delivers a high capacity of 1,220 mAh·g^-1 at 200 mA·g^-1 after 50 cycles and a capacity of 685 mAh·g^-1 at a high current density of 10 A·g^-1. As the anode material for SIBs, the FMO/GO shows an initial discharge capacity of 571 mAh·g^-1 at 100 mA·g^-1, maintaining a discharge capacity of 307 mAh·g^-1 after 100 cycles. The promising performance is attributed to the good electrical transport from the intimate contact between FMO and graphene oxide. This work indicates that the FMO/GO composite is a promising anode for high-performance lithium and sodium storage.

关键词： Fe2（MoO4）3 microflowers anode lithium and sodium storage

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Wall Thinning Characteristics of Ti-3Al-2.5V Tube in Numerical Control Bending Process

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Journal of Shanghai Jiaotong university(Science) 2019年第5期24卷 647-653页

作者： HUANG Tao WANG Kun ZHAN Mei GUO Junqing CHEN Xuewen CHEN Fuxiao SONG Kexing School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang471023HenanChina Collaborative Innovation Center of Nonferrous Metals of Henan Province Luoyang471023HenanChina State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwesternPolytechnical UniversityXi'an710072China

A finite element(FE) model for the numerical control(NC) bending of Ti-3 Al-2.5 V titanium alloy seamless tube is established, considering the variation in the contractile strain ratio(CSR) and elastic modulus(E). The wall thinning characteristics of Ti-3 Al-2.5 V tube under different geometric and process conditions were investigated. The results showed that the CSR-E variation can change the wall thickness, but has no remarkable effect on the change characteristics. The reasonable parameter ranges are as follows: a bending-radius range not less than 1.5 times the outer diameter, a bend angle up to 180?, and a mandrel extension of 0-3 mm. The friction coefficient between the pressure die and the tube should be in the range of 0.20-0.35, and between the bending die and the tube should be in the range of 0.05-0.15. As long as the performance meets the requirements, the relative push-assistant speed should be as small as possible.

关键词： titanium alloy tube numerical control bending wall thinning contractile strain ratio elastic modulus

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Determination of dynamic recrystallization parameter domains of Ni80A superalloy by enhanced processing maps

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Transactions of Nonferrous Metals Society of China 2019年第7期29卷 1449-1464页

作者： Guo-zheng QUAN Qiao LIU Jiang ZHAO Wei XIONG Rui-ju SHI State Key Laboratory of Mechanical Transmission School of Material Science and EngineeringChongqing UniversityChongqing 400044China State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Collaborative Innovation Center of Advanced Nuclear Energy TechnologyInstitute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084China

The determination of intrinsic deformation parameters inducing grain refinement mechanism of dynamic recrystallization (DRX) contributes to the relative forming process design. For Ni80A superalloy, the processing maps were constructed by the derivation of the stress-strain data coming from a series of isothermal compression tests at temperatures of 1273^-1473 K and strain rates of 0.01-10 s^-1. According to the processing maps and microstructural validation, the deformation parameter windows with DRX mechanism were separated in an innovative deformation mechanism map. In addition, the deformation activation energy representing deformation energy barrier was introduced to further optimize such windows. Finally, the enhanced processing maps were constructed and the parameter domains corresponding to DRX mechanism and lower deformation barrier were determined as follows: at ε=0.3, domains: 1296-1350 K, 0.056-0.32 s^-1 and 1350-1375 K, 0.035-0.11 s^-1;at ε=0.5, domains: 1290-1348 K, 0.2-0.5 s^-1 and 1305-1370 K, 0.035-0.2 s^-1;at ε=0.7, domains: 1290-1355 K, 0.042-0.26 s^-1;at ε=0.9, domains: 1298-1348 K, 0.037-0.224 s^-1.

关键词： nickel-based superalloy deformation activation energy processing map dynamic recrystallization

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Microstructure and Mechanical Properties of Resistance Spot Welds for Fe-based Metallic Glass

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Journal of Wuhan University of technology(materials Science) 2018年第4期33卷 946-951页

作者：王善林 GONG Yubing LI Juan LI Hongxiang MAO Yuqing KE Liming National Defence Key Disciplines Laboratory of Light Alloy Processing Science and Technology Nanchang Hangkong UniversityNanchang 330063China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

The lap joints of Fe-based metallic glass ribbons were carried by resistance spot welding, and the microstructures of spot welds were investigated by X-ray diffraction and transmission electron microscopy. The results indicated that the perfect formations of joints without typical defects such as spatter were achieved with optimized parameters. Except for little nano-particle Fe2B, no other crystalline particle was detected by TEM, revealing that the most microstructure in spot weld remains amorphous. The maximum tensile-shearing force was 45.0 N with the optimized parameters of 1 kA weld current, 30 N electrode force and 0.02 ms weld time. The spot weld failed as pullout failure mode propagating along the interface of nugget zone. The study demonstrates that resistance spot welding is an effective and practical welding process for Fe-based metallic glass.

关键词： Fe-based metallic glass resistance spot welding microstructure tensile-shearing force

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High-throughput 3D reconstruction of stochastic heterogeneous microstructures in energy storage materials

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npj Computational materials 2019年第1期5卷 1048-1055页

作者： Yanxiang Zhang Mufu Yan Yanhong Wan Zhenjun Jiao Yu Chen Fanglin Chen Changrong Xia Meng Ni National Key Laboratory for Precision Hot Processing of Metals MIIT Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing TechnologySchool of Materials Science and EngineeringHarbin Institute of Technology150001 HarbinChina CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and EngineeringUniversity of Science and Technology of China230026 HefeiChina College of Science Harbin Institute of Technology518055 ShenzhenChina Center for Innovative Fuel Cell and Battery Technologies School of Materials Science and EngineeringGeorgia Institute of TechnologyGeorgiaGA 30332-0245USA Department of Mechanical Engineering University of South CarolinaCarolinaSC 29205USA Building Energy Research Group Department of Building and Real EstateThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong

Stochastic heterogeneous microstructures are widely applied in structural and functional materials,playing a crucial role in determining their performance.X-ray tomography and focused ion beam serial sectioning are frequently used methods to reconstruct three-dimensional(3D)microstructures,yet are demanding techniques and are ***,a highthroughput multi-stage 3D reconstruction method via distance correlation functions is developed using a single representatively large-sized 2D micrograph for stochastic microstructures,and verified by X-ray micro-tomography datasets of isotropic and anisotropic solid oxide fuel cell *** method provides an economic,easy-to-use and high-throughput approach for reconstructing stochastic heterogeneous microstructures for energy conversion and storage devices,and can readily be extended to other materials.

关键词： materials stochastic readily

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