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SSRN 2024年

作者： Wang, Shihao Liao, Lin Wu, Jinsong Tang, Haolin Zhang, Haining State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory Guangdong Foshan528200 China International School of Materials Science and Engineering School of Materials and Microelectronics Wuhan University of Technology Hubei Wuhan430070 China Nanostructure Research Centre Wuhan University of Technology Hubei Wuhan430070 China Hubei Key Laboratory of Fuel Cell Wuhan University of Technology Hubei Wuhan430070 China

Electrochemical dynamic reconstruction substantially optimizes the catalytic properties of transition-metal-based precatalysts for the multi-electron oxygen evolution reaction (OER) by altering the surface structure, exposing more active sites, improving electron/ion transport, and enhancing stability. This research provides a comprehensive understanding of the in-situ transformation manner of a rosebud-like ternary metal diselenide precatalyst (Ni0.8Fe0.2Co0.1Se2) and the synergistic electrocatalytic mechanism of catalytic active centers through in-situ and ex-situ characterization along with DFT calculations. Benefiting from the unique morphology and abundant nanoscale planar defects within the conductive Ni0.8Fe0.2Co0.1Se2 core and the in-situ formed catalytically active (Fe, Co)-doped γ-NiOOH shell, the reconstructed catalyst achieves rapid electron/ion transport and copious active site exposure. Accordingly, the Ni0.8Fe0.2Co0.1Se2 catalyst only requires overpotentials of 101 mV and 233 mV to achieve current densities of 10 mA cm−2 and 100 mA cm−2, respectively. The overall water-splitting cell using Ni0.8Fe0.2Co0.1Se2 anode delivers current densities of 10 and 100 mA cm−2 at low cell voltages of 1.41 and 1.56 V, respectively. Furthermore, the cell demonstrates exceptional durability of 400 h at an industrial-level current density. This work sheds light on the development of efficient transition-metal-based precatalysts for OER. © 2024, The Authors. All rights reserved.

关键词： Iron compounds

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Effect of Plastic Layer Thickness on the Tensile Behaviors of TiBw/Ti)-Ti3Al Micro-Laminated Composites by Diffusion Bonding

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SSRN 2024年

作者： Qin, Shaohua Zhang, Shuai Zhang, Shuye Wang, Dongjun Jiang, Jufu Yue, Xin Xu, Zhiwu He, Peng School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China National Key Laboratory of Precision Welding Joining of Materials and Structures Harbin Institute of Technology Harbin150001 China National Key Laboratory of Precision Hot Processing Metal Harbin Institute of Technology Harbin150001 China State Key Laboratory of Advanced Welding and Joining China

TiBw/Ti)-Ti3Al micro-laminated composites containing a constant thickness of 300 μm interspersed with varying thicknesses of (TiBw/Ti) layers ranging from 100 μm to 500 μm were meticulously devised and fabricated through diffusion bonding. The interfaces between these layers exhibit robust interfacial bonding. Tensile assessments elucidate a gradual rise in both strength and tensile elongation as the thickness of the (TiBw/Ti) layer increases. Notably, the micro-laminated composites featuring thicker (TiBw/Ti) layers manifest gradient fracture characteristics: ductile fracture within the (TiBw/Ti) layer, brittle crystalline fracture within the Ti3Al layer, and quasi-cleavage fracture in the external portion of the Ti3Al layer proximate to the interface. The outcomes of tensile fracture examinations underscore the pivotal role of the plastic layer (TiBw/Ti layer) thickness in augmenting the strength and plasticity of these micro-laminated composites. © 2024, The Authors. All rights reserved.

关键词： Binary alloys

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Enhanced the Impact Resistance by Gradient Face-Sheet Design of a Sandwich Structure

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SSRN 2023年

作者： Wei, Jing Luo, Guoqiang Liu, Ao Wei, Qinqin Xia, Zhilin Zhang, Ruizhi Shen, Qiang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China National Key Laboratory of Shock Wave and Detonation Physics Institute of Fluid Physics China Academy of Engineering Physics Mianyang621900 China

Sandwich structure has been designed to reduce the impact damage of the stress waves. However, the existing work focuses on the optimization of sandwich cores while the important face-sheet structure is seldom improved. Here, we used the impedance matching theory to design a negative gradient face-sheet sandwich structure with excellent stress wave attenuation performance. Owing to stress wave attenuation form a high impedance to a low one, the negative gradient face-sheet sandwich structure shows a low peak stress of 5.51 MPa, and the average transmission peak stress is 2.69 MPa. The gradient face-sheet structure changes the compressive deformation behavior;thus, the energy absorption performance of the negative gradient face-sheet sandwich structure increases to be 1311.8 KJ/m3 and the specific energy absorption reaches 1072 J/kg. Finite-element methods further demonstrate the overall sandwich structures can be enhanced through alleviating the failure of sandwich core by a gradient face-sheet structure. This work provides a paradigm for the design of sandwich structures with high energy absorption performance. © 2023, The Authors. All rights reserved.

关键词： Energy absorption

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石墨Gibbs表面自由能对锂离子电池传统负极浆初始黏度和稳定性的影响

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Journal of Central South University 2023年第3期30卷 665-676页

作者：周奇文博张佳丽刘锋欧阳晓平梁伊丽吴泽轶谢志勇 State Key Laboratory of Powder Metallurgy(Central South University) Changsha 410083China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals(Kunming Institute of Precious Metals) Kunming 650106China Key Laboratory of Low Dimensional Materials and Application Technology(Xiangtan University) Ministry of EducationXiangtan 411105China School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China©Central South University 2023

负极浆料的初始黏度和稳定性对锂离子电池的生产工艺和后期性能至关重要。但是关于石墨原料的理化性质对负极浆料初始黏度和稳定性的影响尚未从根本上阐明。通过对不同粒度和比表面积的商业化石墨进行初始黏度测试,发现负极浆料的初始... 详细信息

负极浆料的初始黏度和稳定性对锂离子电池的生产工艺和后期性能至关重要。但是关于石墨原料的理化性质对负极浆料初始黏度和稳定性的影响尚未从根本上阐明。通过对不同粒度和比表面积的商业化石墨进行初始黏度测试,发现负极浆料的初始黏度与石墨的非极性Gibbs表面自由能呈正相关。同时还发现,Gibbs表面自由能极性部分和非极性部分的相对大小对负极浆料的稳定性有影响。当Gibbs表面自由能极性部分接近非极性部分时,制备的浆料具有最佳的稳定性,且静置120 h以后克容量保持稳定。有趣的是,XRD和Raman光谱表征结果显示石墨粒子的Gibbs表面自由能与缺陷之间没有直接的线性关系。本研究可为锂离子电池工业生产中石墨原料的选择提供指导。

关键词：锂离子电池 Gibbs表面自由能石墨负极浆料

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Ultraviolet and Thermal Dual-Curing Assisted Extrusion-Based Additive Manufacturing of Lunar Regolith Simulant for In-Site Construction on the Moon

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SSRN 2023年

作者： Cui, Qianshun Wang, Tongcai Gu, Guangshuai Zhang, Rihan Zhao, Tingting Huang, Zhifeng Wang, Gong Chen, Fei Technology and Engineering Center of Space Utilization Chinese Academy of Sciences Beijing100094 China University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

The establishment of a lunar base is crucial for lunar studies, resource extraction, and advancement in deep space exploration. Considering the limitations of rocket capacity and Earth-Moon transportation costs, lunar regolith is regarded as the most practical material for lunar base construction. Consequently, the in-situ additive manufacturing technology for simulated lunar regolith has been widely studied in recent years. This paper proposes a novel additive manufacturing approach for lunar regolith simulants. The simulants and several resins were mixed into a high-solid-loading paste, which was suitable for extrusion-based additive manufacturing process. To fully leverage the lunar environment, the feasibility of the ultraviolet (UV) and thermal curing of the resins was first verified, which was followed by the validation of the lunar regolith paste with the solid content of 86 wt.%. After the characterization of the ultraviolet and heat curing properties, the paste was further 3D printed via the extrusion-based device. The extruded paste underwent preliminary curing in a UV environment and was then heated to approximate the daytime lunar conditions, achieving complete curing of the printed component. The cured parts exhibited a compressive strength of 9.83 ± 1.07 MPa, meeting the requirements for infrastructure construction in the low-gravity lunar environment. This work offers significant implications for future in-situ construction on the Moon using extrusion-based lunar regolith additive manufacturing. © 2023, The Authors. All rights reserved.

关键词： 3D printing

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Oxygen/Sulfur Atom Exchange Copolymerization of Carbon Disulfide and Propylene Oxide by a Highly Effective Heterogeneous Berlin Green Catalyst

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Chemical Research in Chinese Universities 2023年第5期39卷 790-796页

作者： Munir Ullah KHAN Safir Ullah KHAN CAO Xiaohan Muhammad USMAN Muhammad Naeem SHAH Abdul GHAFFAR Muhammad HASSAN ZHANG Chengjian ZHANG Xinghong State Key Laboratory of Motor Vehicle Biofuel Technology International Research Center for X PolymersDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027P.R.China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Shanxi 030013P.R.China Hefei National Laboratory for Physical Science at the Microscale School of Life SciencesUniversity of Science and Technology of ChinaHefei 230027P.R.China Key Laboratory of Macromolecular Synthesis and Functionalization(Ministry of Education) International Research Center for X PolymersDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027P.R.China College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027P.R.China Advanced Materials Research Center Zhejiang University-University of Illinois at Urbana-Champaign Institute(ZJU-UIUC)Haining 314400P.R.China

In this study,we report that Berlin Green(FeFe-BG)framework exhibits superior performance in the catalytic coupling of carbon disulfide(CS_(2))and propylene oxide(PO)to generate a random copolymer containing thioether,propylene monothiocarbonate and ether *** and sulfur atom exchange was detected in polymeric and cyclic thiocarbonate byproducts and utilized to modulate the copolymerization of CS_(2)and propylene *** coupling of PO and CS_(2)was selective for copolymer formation under various reaction conditions.^(1)H and^(13)C NMR spectroscopy determined two distinct polymer linkages and two cyclic *** number average molecular weights ranged from 6.4 kg/mol to 10.5 kg/mol,with a comparatively low polydispersity of *** CS_(2)/PO molar feed ratio had a significant impact on the O/S exchange process;the ratio of cyclic thiocarbonate byproducts could be efficiently regulated by tuning the CS_(2)molar feed ratio.

关键词： Carbon disulfide Copolymerization Prussian Blue analogue Heterogeneous catalysis Berlin Green

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Off-centering effect and crystal symmetry modification lead to high thermoelectric performance in diamondoid Cu_(2)SnSe_(3)

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National Science Open 2025年第3期4卷 35-52页

作者： Pengpeng Chen Shulin Bai Yi Wen Yichen Li Zihao Zhao Dezheng Gao Houdong Huang Yixuan Hu Tian Gao Lei Wang Shaoping Zhan Xiang Gao Xianli Su Hongyao Xie Li-Dong Zhao School of Materials Science and Engineering Beihang UniversityBeijing 100191China Center for Bioinspired Science and Technology Hangzhou International Innovation InstituteBeihang UniversityHangzhou 311115China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Center for High Pressure Science and Technology Advanced Research(HPSTAR) Beijing 100094China

Recently,dimensionless figure of merit(ZT)beyond 1.0 has been demonstrated in diamondoid Cu_(2)SnSe_(3),positioning it as a low-cost and ecofriendly thermoelectric alternative,and sparking intense interest in further optimizing its thermoelectric ***,its intrinsic monoclinic structure and the compact packing of tetrahedral coordination lead to a light valence band and high thermal conductivity,which impede further performance improvement in Cu_(2)SnSe_(3).Thus,developing effective approaches to altering the local structure of Cu_(2)SnSe_(3)is important for further optimizing its thermoelectric ***,we identified and thoroughly investigated the atomic off-centering behavior in Cu_(2)SnSe_(3),and demonstrated the electronic and phonon transport properties of Cu_(2)SnSe_(3)can be significantly enhanced by carefully modifying its monoclinic lattice into a distorted zinc-blende cubic structure via introducing Cd and off-centering Ag *** structure transition leads to band convergence and a reduction in the deformation potential of the material,resulting in a 7-fold enhancement in the density-of-state effective mass and an 85%increase in carrier ***,the off-centering effect results in strong acoustic-optical phonon scattering and an ultra-low lattice thermal conductivity of 0.3 W m^(-1)K^(-1).Consequently,a maximum ZT of 1.3 was obtained at 800 K for the Cu_(1.85)Ag_(0.15)Sn_(0.9)Cd_(0.1)Se_(3).

关键词： thermoelectric crystal structure transition off-centering behavior local symmetry breaking

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Pyrolysis of ZIF-Co assisted by a small amount of KNO3: Tuning of Co-CoOx@N, O co-doped carbon hybrid nanostructures for accelerating water splitting

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SSRN 2024年

作者： Li, Anqi Qian, Xiaoyu Han, Mengyan Li, Zhichun He, Xiaobo Wang, Guofeng Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical Engineering Changzhou University Changzhou213164 China State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China

Electrochemical catalytic water splitting is considered as a green and promising technique for hydrogen production, and highly active catalysts toward cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER) are required, especially for bifunctional ones. In this work, the bifunctional catalysts with Co-CoOx@N, O co-doped carbon (NOC) hybrid nanostructures have been prepared via pyrolysis of ZIF-Co with assistance of a small amount of KNO3. KNO3 plays important roles in tuning the inner and outer structures of Co-CoOx@NOC hybrid nanostructures. The proposed SOv, which is defined as the content of oxygen vacancy (Ov) per unit surface area of the inner Co-CoOx nanoparticle, and charge transfer resistance (Rct) are used as the descriptors of inner structures, while hydrophilicity (or contact angle) is applied as the main feature of outer structures. SOv, Rct and hydrophilicity are well tuned by the fed mass of KNO3, and a moderate fed mass is the key to balancing SOv, Rct and hydrophilicity and further is beneficial to accelerating specific activity for both HER and OER. Thus, both HER and OER specific activity is peaked by Co-CoOx@NOC-0.025KNO3 with a moderate fed mass of KNO3 of 0.025 g. This optimal catalyst also has high apparent activity with high HER and OER current densities (≥500 mA cm-2) under low overpotentials, and promotes overall water splitting with high current densities (500 mA cm-2) at a cell voltage of ~1.63 V. © 2024, The Authors. All rights reserved.

关键词： Electrocatalysis

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Refining microstructure and improving mechanical-corrosion properties of high Zn containing single β-phase Mg-Li alloy via friction stir processing

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materials Letters 2025年 397卷

作者： Geng, Yingxin Zhou, Mengran Zhu, Yixing Xin, Tongzheng Tang, Song Zeng, Zhuoran Chen, Gaoqiang Wu, Ruizhi Shi, Qingyu State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Department of Mechanical Engineering Tsinghua University Beijing100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Beijing100084 China School of Materials Science and Engineering Dalian University of Technology Dalian116024 China Herbert Gleiter Institute of Nanoscience School of Materials Science and Engineering Nanjing University of Science and Technology Jiangsu210094 China State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan University Changsha410082 China College of Materials Science and Engineering Hunan University Changsha410082 China Harbin Engineering University Harbin150001 China

In this study, a β-phase Mg-14Li-22Zn alloy with high Zn content was fabricated via friction stir processing, demonstrating great potential for high-performance lightweight applications. The influence of tool rotation speed on microstructure evolution, mechanical properties, and corrosion behavior was investigated. Notably, significant improvements in compressive strength, work-hardening rate, and corrosion resistance were achieved, particularly at a tool rotation speed of 400 rpm, due to the uniform dispersion of MgZn2 and MgLi2Zn phases within the fine-grained microstructure. © 2025

关键词： Compressive strength

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Insights into crystal growth and morphology evolution mechanism of multi-component carbide: Experiments and first-principles calculations

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Journal of materials Science & technology 2026年 240卷 27-34页

作者： Yong Fan Yuyao Chen Jin Wang Lei Gu Kaixuan Zhou Yuanyuan Gong Wei Liu Yonghao Zhao Xiangfa Liu Jinfeng Nie Nano and Heterogeneous Materials Center School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials Technology School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China School of Materials Science and Engineering Hohai University Changzhou 213200 China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University Jinan 250061 China

Multi-component transition metal carbides (MTMCs) have garnered significant attention for their outstanding high-temperature stability and versatile properties, which make them ideal candidates for a wide range of industrial applications. However, the underlying mechanisms governing the crystal growth and morphological evolution of MTMCs remain poorly understood, hindering the design of materials with tailored characteristics. In this paper, we employ an in-situ liquid-solid reaction method to synthesize (HfTaZrNbTi)C MTMC powders and explore their crystal growth and morphology evolution. The synthesized (TiZrHfNbTa)C powders exhibit two distinct morphologies: cubic, primarily composed of Ti, Hf, Ta, and Zr with a small amount of Nb, and octahedral, rich in Ti and Ta with minor amounts of Hf, Nb, and Zr. First-principles calculations show that the surface energy of the (100) plane is lower than the (111) plane, leading to the formation of the cubic morphology. The octahedral morphology forms due to decreased mixing entropy and higher theoretical density compared to cubic particles. Our findings provide valuable insights into the crystal growth and morphology evolution mechanisms of high-entropy ceramics, contributing to the rational design of MTMCs with engineered crystal structures for diverse structural and functional applications.

关键词： Multi-component carbide First-principles calculations Crystal growth Morphology evolution mechanism

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