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Niobium oxide/MXene heterostructure for simultaneous production of ammonia and energy via rechargeable Zn-N2 battery system

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Journal of Energy Chemistry 2025年第4期103卷 448-457页

作者： Xinyu Dai Wei Zhang Ying Sun Zhenyi Du Zhanliang Tao Jingang Wang Wenhui Fang Xuehan Xing Yang Chen Hui Li Hao Zheng Jieshan Qiu Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning Province College of ChemistryLiaoning University State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of Technology Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University College of Science Liaoning Petrochemical University College of Chemical Engineering State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Centre for Atomaterials and Nanomanufacturing (CAN) School of Science RMIT University ARC Industrial Transformation Research Hub for Intelligent Energy Efficiency in Future Protected Cropping (E2Crop) College of Chemical State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology

Aqueous Zn-N2batteries with unique configuration are of potential for simultaneous N2electro reduction and electricity generation,in which the electrocatalysts are critical for improving the NH3yield and the energy ***,a heterostructure Nb2O5/Nb2CTXwith abundant exposed Nb active sites and tuned electron density has been synthesized by in situ formation and anchoring of Nb2O5nanoparticles on the surface of Nb2CTXMXene,which shows an enhanced N2adsorption/activation *** heterostructure Nb2O5/Nb2CTXwas used as the cathode of Zn-N2battery that can deliver a peak power density of 1.25 mW cm-2in 1.0 M KOH and can continuously produce NH3with a yield of3.62 μg *** NH3formed in the battery system can be easily collected as a net product without circulating the ***,the Nb2O5/Nb2CTXhas a long durability,evidenced by 70 h of operation at-0.4 V *** hydrogen electrode,which is the highest among the MXene-based electrocatalysts reported thus *** work may provide a new methodology based on Zn-N2battery for sustainable and large-scale NH3production with minimal energy consumption.

关键词： NH 3 production Zn-N 2 battery N 2 Electroreduction Nb 2 O 5 /Nb 2 CT X heterostructure

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Crystallographic micro-mechanism of faceted crack initiation in near-αtitanium alloy Ti6321 under room-temperature fatigue and dwell fatigue loadings

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材料科学技术（英文版） 2025年第2期205卷 109-126页

作者： Wenyuan Zhang Qiaonan Shu Jiangkun Fan Panpan Fan Xiangyi Xue Peng Jiang Minjie Lai Bing Tang Zhiqian Liao Hongchao Kou Jinshan Li State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China National & Local Joint Engineering Research Center for Precision Thermoforming Technology of Advanced Metal Materials Xi'an 710072China Chongqing Innovation Center Northwestern Polytechnical UniversityChongqing 401135China Luoyang Ship Material Research Institute Luoyang 471000China

Crack initiation mechanism of dwell fatigue has always been a key problem in rationalizing the dwell effect,and it is not completely understood *** study conducted stress-controlled low-cycle fatigue and dwell fatigue tests on Ti-6Al-3Nb-2Zr-1Mo alloy with bimodal microstructure to reveal its microstruc-tural characteristics and crack initiation *** study demonstrated that the faceted primaryα nodules located near the specimen surface acted as crack initiation sites during both fatigue and dwell fatigue *** trace analysis revealed that faceted cracking occurred at(0001)basal plane with the maximum Schmid factor value through a special cracking mode referred to as(0001)twist boundary *** criteria of parameters C1 and C2 were proposed based on experimental observation and molecular dynamics simulations,which well identify candidates for(0001)twist boundary crack *** demonstrated that grain pairs combining a moderately high Schmid factor for basal slip and a well-orientated Burgers vector in the out-of-surface plane was the preferable location for surface(0001)twist-boundary crack initiation,and grain pairs combining a high Schmid factor for basal slip and a high normal stress on basal plane are perfect candidates for subsurface *** on this,phenomeno-logical models are proposed to explain the surface(0001)twist-boundary cracking mechanism from the perspective of surface extrusion-intrusion-induced micro-notches.

关键词： Titanium alloy Dwell fatigue Facet Fatigue crack initiation Crystallographic orientation

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Thickness-dependent magnetic property of FeNi thin film grown on flexible graphene substrate

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Chinese Physics B 2025年第2期34卷 448-452页

作者： Suixin Zhan Shaokang Yuan Yuming Bai Fu Liu Bohan Zhang Weijia Han Tao Wang Shengxiang Wang Cai Zhou State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China School of Mathematical and Physical Sciences Wuhan Textile UniversityWuhan 430200China School of Integrated Circuits Huazhong University of Science and TechnologyWuhan 430074China Key Laboratory for Magnetism and Magnetic Materials Ministry of EducationLanzhou UniversityLanzhou 730000China

Electronics over flexible substrates offer advantages of flexibility, portability and low cost, and promising applications in the areas of energy, information, defense science and medical service. In recent years, tremendous progress has been witnessed in the development of flexible wearable devices that can be potentially massively deployed. Of particular interest are intelligent wearable devices, such as sensors and storage cells, which can be integrated by flexible magnetoelectronic devices based on magnetic thin films. To examine this further, the magnetic properties of FeNi thin films with different thicknesses grown on flexible graphene substrate are investigated at room temperature. The coercivity increases with increasing thicknesses of FeNi thin film, which can be attributed to the increase of grain size and decrease of surface roughness. Moreover, the thickness modulated magnetic property shows a magnetic anisotropy shift increase with varying thicknesses of FeNi thin film by using measurements based on ferromagnetic resonance, which further enhances the resonance frequency. In addition, the resonance peak is quite stable after bending it for ten cycles. The result is promising for the future design of flexible magnetoelectronic devices.

关键词： resonance frequency FeNi thin film flexible graphene substrate magnetic property

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Emerging natural clay-based materials for stable and dendrite-free lithium metal anodes:A review

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Chinese Chemical Letters 2025年第2期36卷 133-144页

作者： Haobo Wang Fei Wang Yong Liu Zhongxiu Liu Yingjie Miao Wanhong Zhang Guangxin Wang Jiangtao Ji Qiaobao Zhang School of Materials Science and Engineering Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal new Materials and Advanced Processing TechnologyHenan University of Science and TechnologyLuoyang 471023China Faculty of Engineering Huanghe Science and Technology UniversityZhengzhou 450063China Henan Key Laboratory of Non-Ferrous Materials Science&Processing Technology Henan University of Science and TechnologyLuoyang 471023China College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471023China State Key Laboratory of Physical Chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamen 361005China

Lithium metal is one of the most promising anodes for lithium batteries because of their high theoretical specific capacity and the low electrochemical ***,the commercialization of lithium metal anodes(LMAs)is facing significant obstacles,such as uncontrolled lithium dendrite growth and unstable solid electrolyte interface,leading to inferior Coulombic efficiency,unsatisfactory cycling stability and even serious safety *** low-cost natural clay-based materials(NCBMs)in LMAs is deemed as one of the most effective methods to solve aforementioned *** NCBMs have received considerable attention for stabilizing LMAs due to their unique structure,large specific surface areas,abundant surface groups,high mechanical strength,excellent thermal stability,and environmental *** the rapidly growing research enthusiasm for this topic in the last several years,here,we review the recent progress on the application of NCBMs in stable and dendrite-free *** different structures and modification methods of natural clays are first *** addition,the relationship between their modification methods and nano/microstructures,as well as their impact on the electrochemical properties of LMAs are systematically ***,the current challenges and opportunities for application of NCBMs in stable LMAs are also proposed to facilitate their further development.

关键词： Natural clay-based materials Aolid-state electrolyte Surface modification Li metal anodes Rechargeable batteries

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Design and Dynamic Experiment of Al-Cu Graded materials Impactor with Strain Rate of 10^(4)–10^(5)/s

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稀有金属材料与工程 2025年第3期54卷 581-586页

作者： Hu Jianian Zhou Zizheng Li Yidi Chen Xiang Yang Gang Liu Jintao Zhang Jian State Key Laboratory of Precision Blasting Jianghan UniversityWuhan 430056China Hubei Key Laboratory of Blasting Engineering Jianghan UniversityWuhan 430056China Luoyang Ship Material Research Institute Luoyang 471023China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Based on simplified calculations of one-dimensional wave systems,loading pressure platform curves of Al-Cu gradient materials(GMs)impactor were *** Al-Cu GMs were prepared using tape-pressing sintering,and their acoustic properties were characterized to match the design *** parallelism of the Al-Cu GM was confirmed using a three-dimensional surface profilometry machine.A one-stage light-gas gun was used to launch the Al-Cu GM,impacting an Al-LiF target at a velocity of 400 m/*** results of the experimental strain rate demonstrate that the Al-Cu GMs can realize the precise control of the strain rate within the range of 10^(4)‒10^(5)/s in the high-speed impact experiments.

关键词： high strain rate Al-Cu graded materials impactor acoustic impedance gas gun experiment

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Regulating crystallization and retarding oxidation in Sn-Pb perovskite via 1D cation engineering for high performance all-perovskite tandem solar cells

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Journal of Energy Chemistry 2025年第1期100卷 646-652页

作者： Ranran Liu Xin Zheng Zaiwei Wang Miaomiao Zeng Chunxiang Lan Shaomin Yang Shangzhi Li Awen Wang Min Li Jing Guo Xuefei Weng Yaoguang Rong Xiong Li Michael Grätzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074HubeiChina Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina School of Chemistry Chemical Engineering and Life SciencesState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology430070HubeiChina Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO) Chinese Academy of SciencesSuzhou 215123JiangsuChina School of Physics and Optoelectronic Engineering Hainan UniversityHaikou 570228HainanChina

All-perovskite tandem solar cells have the potential to surpass the theoretical efficiency limit of single junction solar cells by reducing thermalization ***,the challenges encompass the oxidation of Sn^(2+)to Sn^(4+)and uncontrolled crystallization kinetics in Sn-Pb perovskites,leading to nonradiative recombination and compositional heterogeneity to decrease photovoltaic efficiency and operational ***,we introduced an ionic liquid additive,1-ethyl-3-methylimidazolium iodide (EMIMI) into Sn-Pb perovskite precursor to form low-dimensional Sn-rich/pure-Sn perovskites at grain boundaries,which mitigates oxidation of Sn^(2+)to Sn^(4+)and regulates the film-forming dynamics of Sn/Pb-based perovskite *** optimized single-junction Sn-Pb perovskite devices incorporating EMIMI achieved a high efficiency of 22.87%.Furthermore,combined with wide-bandgap perovskite sub-cells in tandem device,we demonstrate 2-terminal all-perovskite tandem solar cells with a power conversion efficiency of 28.34%,achieving improved operational stability.

关键词： All-perovskite tandem solar cells Sn-Pb perovskite 1D Regulated crystallization Antioxidation

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Engineering design of feedstock powder and relevant thermal-mechanical performance of thermal/environmental barrier coatings

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Journal of advanced Ceramics 2025年第2期14卷 37-56页

作者： Xinchang Feng Fangwei Guo Lirong Luo Yuzhang Wang Yun Long Xiaofeng Zhao Fei Pan Lei Guo Qingfeng Zeng Jing Feng Chunlei Wan Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China National Engineering Research Center of Special Equipment and Power System for Ship and Marine Engineering Shanghai 200030China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Nuclear Energy Technology Nuclear Power Institute of ChinaChengdu 610213China Innovative Sensor Technology IST AG Ebnat-Kappel 9642Switzerland School of Materials Science and Engineering Tianjin UniversityTianjin 300072China Tianmushan Laboratory Hangzhou 311115China School of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

The development of aeroengine with a high thrust-weight ratio poses great challenges for current top-coating thermal barrier coatings (TBCs) and environmental barrier coatings (EBCs) in service. Medium/high-entropy ceramics are highly promising candidate material for advanced TBCs/EBCs owing to their low thermal conductivity, high melting point, high-temperature stability, and calcium–magnesium–alumino–silicate (CMAS) resistance. Most feedstock powder used for medium/high-entropy TBCs/EBCs is prepared via traditional spray drying, which cannot fully exploit the advantages of multicomponent ceramics. The density, sphericity, inner structure, and flowability of feedstock powder affect their melting state during the thermal spraying process, which strongly affects the microstructure and properties of the deposited coatings. Therefore, the deposited coatings exhibit phase segregation, amorphous phases, and microstructure defects owing to unpredictable variations in feedstock powder with random morphologies and structures. Here, the structure and properties of feedstock powder prepared by state-of-the-art granulation technologies and their influences on the deposited coatings were systematically investigated, which can provide guidance for configuration optimization of feedstock powder and the manufacturing accuracy of the deposited coating. This review aims to bridge the gap between cutting-edge ceramics and advanced engineering technologies, thus providing concrete background knowledge and crucial guidelines for designing and developing TBCs/EBCs.

关键词： thermal/environmental barrier coatings(TBCs/EBCs) spraying ceramic powder multiscale structure control high-entropy ceramics thermal-mechanical performance

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synthesis of highly sinterable MgO powders for IR transparent ceramics

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Ceramics International 2025年

作者： Zhi, Yongli Mei, Bingchu Li, Weiwei Cheng, Jing Luo, Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Jianghuai Advance Technology Center Hefei230000 China

MgO transparent ceramics (TCS) have attracted great interests in the field of infrared window materials due to its wide transmission range, excellent thermal conductivity, and balanced mechanical properties. To date, research on MgO transparent ceramics predominantly relies on commercial MgO powders by spark plasma sintering (SPS). Herein, we report highly sinterable MgO powders synthesized by co-precipitation method, which exhibits pure phase and particle size of 75 nm. When sintered at 950 °C under 45 MPa for 2 h by hot pressed (HP) method, the transmittance of the MgO ceramic sample with the thickness of 2 mm achieved 76.9 % at 0.4 μm and 88.3 % at 5 μm. These optical properties are comparable to or even superior to MgO TCS produced through SPS method. This work shows that the MgO particles synthesized via the co-precipitation method are suitable for producing high optical quality of MgO infrared (IR) transparent ceramics. © 2025

关键词： Thermal conductivity

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稀有金属材料与工程 2025年第2期54卷 311-318页

作者： Zhang Wenxin Zhang Xiankun Shi Lei Li Shengli Jiang Yuanning Wu Chuansong State Key Laboratory of Advanced Equipment and Technology for Metal Forming Shandong UniversityJinan 250061China Key Laboratory for Liquid-Solid Structure Evolution&Processing of Materials Ministry of EducationShandong UniversityJinan 250061China

Friction stir lap welding of AA2195 Al-Li alloy and Ti alloy was conducted to investigate the formation,microstructure,and mechanical properties of the *** show that under different welding parameters,with the decrease in welding heat input,the weld surface is *** Ti/Al joint interface is flat without obvious Ti and Al mixed structure,and the hook structure is not formed under optimal *** to the enhanced breaking effect of the stirring head,the hook structural defects and intermetallic compounds are more likely to form at the Ti/Al interface at high rotational speed of 1000 r/min,thereby deteriorating the mechanical properties of *** the heat input is beneficial to hardness enhancement of the aluminum alloy in the weld nugget *** the optimal parameters of rotation speed of 800 r/min and welding speed of 120 mm/min,the maximum tensile shear strength of joint is 289 N/mm.

关键词： Ti/Al dissimilar welding friction stir lap welding Ti alloy Al-Li alloy interface bonding mechanical property

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Microstructures and mechanical properties of B4C–TiB2 ceramics fabricated by reactive sintering using B4C–Ti mixture

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Ceramics International 2025年

作者： Cui, Yi Bao, Sizhuo Sun, Yan Zhang, Ao He, Qianglong Wang, Weimin State Key Laboratory 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

In this study, B4C–TiB2 ceramics were prepared via reactive sintering using B4C–Ti as the raw material. By investigating the sintering curve, microstructures, and mechanical properties at different sintering temperatures, the liquid-phase sintering environment provided by Ti melting was found to play a key role in densification. The high-speed densification stage occurs between 1800 and 1900 °C, which improves the comprehensive properties of B4C–TiB2 composite ceramics at 1900 °C. B4C–TiB2 composites achieved the best comprehensive properties at 1950 °C. Relative density, Vickers hardness, bending strength, and fracture toughness were 99.3 %, 32.6 GPa, 433 MPa, and 5.25 MPa m1/2, respectively. Vickers hardness and bending strength were affected by density, while fracture toughness was also affected by the TiB2 phase distribution. Additionally, improvement in fracture toughness was the result of the joint action of crack deflection, crack bridging, crack branching, and microcracking mechanisms. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Ceramic materials

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