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Refinement of TiB_(2)Powders with High-speed Planetary Mill and Its Effect on TiB_(2)Sinterability

Journal of Wuhan University of technology(Materials Science) 2021年第3期36卷 331-337页

作者： HUANG Qiwei AI Ruomeng BAI Wenhui HE Qianglong WANG Aiyang HU Lanxin WANG Weimin The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Titanium diboride ceramic was produced via spark plasma sintering(SPS)using finer TiB_(2)powder made by high-speed planetary ball *** effects of ball milling parameters on the composites and particle size of TiB_(2)powder were *** was shown that the average particle size of TiB_(2)powder decreased from 5.8 to 1.59μm and the wear rate of WC balls was 1.58 wt%,when the ball-to-powder weight ratio(BPR),the rotary speed and milling time and were 10:1,600 rpm and 20 min,*** content of WC in TiB_(2)powder can be limited below 4.58 vol%by optimizing the milling *** sintering temperature of TiB_(2)powder milled can be decreased obviously,and the mechanical properties are evidently improved and the microstructure becomes more homogeneous when the powder of TiB_(2)becomes *** relative density,hardness,bending strength,and fracture toughness of the TiB_(2)ceramic fabricated at 1700℃reach the optimal values,which are 98.13%,19.14 GPa,756 MPa,and 5.71 MPa·m~(1/2),*** decrease of TiB_(2)particle size and the introduction of WC are the potential reasons for the improvement of TiB_(2)ceramic performance.

关键词： TiB_(2)ceramic high-speed planetary ball mill particle size WC mechanical property

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Defect engineering in molybdenum-based electrode materials for energy storage

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eScience 2022年第3期2卷 278-294页

作者： Weixiao Wang Fangyu Xiong Shaohua Zhu Jinghui Chen Jun Xie Qinyou An State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan528200China

Molybdenum-based materials have stepped into the spotlight as promising electrodes for energy storage systems due to their abundant valence states,low cost,and high theoretical ***,the performance of conventional molybdenum-based electrode materials has been limited by slow diffusion dynamics and deficient *** defect engineering to molybdenum-based electrode materials is a viable method for overcoming these intrinsic limitations to realize superior electrochemical performance for energy ***,we systematically review recent progress in defect engineering for molybdenum-based electrode materials,including vacancy modulation,doping engineering,topochemical substitution,and *** particular,the essential optimization mechanisms of defect engineering in molybdenum-based electrode materials are pre-sented:accelerating ion diffusion,enhancing electron transfer,adjusting potential,and maintaining structural *** also discuss the existing challenges and future objectives for defect engineering in molybdenum-based electrode materials to realize high-energy and high-power energy storage devices.

关键词： Energy storage Molybdenum-based electrode materials Defect engineering

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Interfacial reaction behavior and mechanical properties of 5A06 Al alloy soldered with Sn-1Ti-xGa solders at a low temperature

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China Welding 2023年第2期32卷 23-31页

作者：宋立志肖勇奚邦富李佳琪张建 School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Active soldering of 5A06 Al alloy was performed at 300 ℃ by using Sn-1Ti and Sn-1Ti-0.3Ga active solders, respectively. Theeffects of soldering time on the microstructure and mechanical properties of the joints were investigated. The results showed that the Sn-1Tisolder broke the oxide film on the surface of the Al substrate and induced intergranular diffusion in the Al substrate. When Ga was added tothe solder, severe dissolution pits appeared in the Al substrate due to the action of Sn-1Ti-0.3Ga solder, and many Al particles were flakedfrom the matrix into the solder seam. Under thermal stress and the Ti adsorption effect, the oxide film cracked. With increasing solderingtime, the shear strength of 5A06 Al alloy joints soldered with Sn-1Ti and Sn-1Ti-0.3Ga active solders increased. When soldered for 90 min,the joint soldered with Sn-1Ti-0.3Ga solder had a higher shear strength of 22.12 MPa when compared to Sn-1Ti solder.

关键词： 5A06-Al alloy Sn-Ti-Ga solder low-temperature soldering interfacial reaction mechanical properties

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Magnetic skyrmions:Basic properties and potential applications

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Interdisciplinary Materials 2023年第2期2卷 260-289页

作者： Sheng Li Xuewen Wang Theo Rasing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhanPeople's Republic of China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory FoshanPeople's Republic of China Institute for Molecules and Materials Radboud UniversityNijmegenThe Netherlands

Magnetic skyrmions are particle-like topological magnetic textures that are potential information carriers in future *** enormous body of research confirms their existence in a broad range of magnetic materials since their first discovery in *** date,magnetic skyrmions can not only be found in asymmetric systems but also in centrosymmetric ***,engineered magnetic multilayers are promising structures for skyrmion-based spintronics because they can stabilize small-sized skyrmions at room temperature and facilitate their electric *** this overview,we introduce the topological nature,their special properties,and nucleation methods of skyrmions,and show their potential for *** on skyrmionic devices and developments toward other,more three-dimensional particle-like magnetic nanostructures,are discussed at the end.

关键词： antiferromagnetic skyrmions magnetic multilayers magnetic skyrmions skyrmion Hall effect spintronics ultrafast laser pulses

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Facet Regulation of Fe_(2)O_(3) via Nanoarray Architecture to Enable High Faradic Efficiency for Electrocatalytic Nitrogen Fixation

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Journal of Wuhan University of technology(Materials Science) 2022年第5期37卷 807-814页

作者： XIE Angi XIAO Liang QIAO Qiumin LIU Jinping School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

We propose a facile facet regulation enabled by nanoarray architecture to achieve a high faradic efficiency of Fe_(2)O_(3) catalyst for NRR. The a-Fe_(2)O_(3) nanorod arrays (NAs) were directly grown on carbon cloth (CC) with specific (104) facet exposure. The highly exposed (104) facets provide abundant unsaturated Fe atoms with dangling bonds as nitrogen reduction reaction catalytically active sites. In addition, the NAs architecture enables the enhanced electrochemical surface area (ECSA) to fully manifest the active sites and maintain the mass diffusion. Thus, the selectively exposed (104) facets coupled with the high ECSA of NAs architecture achieve a high FE of 14.89% and a high yield rate of 17.28 μg h^(-1) cm^(-2). This work presents an effective strategy to develop highly efficient catalytic electrodes for electrochemical NRR via facet regulation and nanoarray architecture.

关键词： facet regulation Fe_(2)O_(3) nanoarray architecture nitrogen reduction reaction faradic efficiency

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Tailoring lithium intercalation pathway in 2D van der Waals heterostructure for high-speed edge-contacted floating-gate transistor and artificial synapses

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InfoMat 2024年第10期6卷 53-64页

作者： Jun Yu Jiawei Fu Hongcheng Ruan Han Wang Yimeng Yu Jinpeng Wang Yuhui He Jinsong Wu Fuwei Zhuge Ying Ma Tianyou Zhai State Key Laboratory of Materials Processing and Die and Mould Technology School of Material Science and EngineeringHuazhong University of Science and Technology(HUST)Wuhanthe People's Republic of China Hubei Yangtze Memory Laboratory School of Integrated CircuitsHuazhong University of Science and Technology(HUST)Wuhanthe People's Republic of China School of Information Engineering Zhongnan University of Economics and LawWuhanthe People's Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research CenterWuhan University of TechnologyWuhanthe People's Republic of China Optics Valley Laboratory Hubeithe People's Republic of China

Local phase transition in transition metal dichalcogenides (TMDCs) by lithiumintercalation enables the fabrication of high-quality contact interfaces in twodimensional(2D) electronic devices. However, controlling the intercalation oflithium is hitherto challenging in vertically stacked van der Waalsheterostructures (vdWHs) due to the random diffusion of lithium ions in thehetero-interface, which hinders their application for contact engineering of 2DvdWHs devices. Herein, a strategy to restrict the lithium intercalation pathwayin vdWHs is developed by using surface-permeation assisted intercalationwhile sealing all edges, based on which a high-performance edge-contact MoS_(2)vdWHs floating-gate transistor is demonstrated. Our method avoids intercalationfrom edges that are prone to be random but intentionally promotes lithiumintercalation from the top surface. The derived MoS_(2) floating-gatetransistor exhibits improved interface quality and significantly reduced subthresholdswing (SS) from >600 to 100 mV dec^(–1). In addition, ultrafast program/erase performance together with well-distinguished 32 memory statesare demonstrated, making it a promising candidate for low-power artificialsynapses. The study on controlling the lithium intercalation pathways in 2DvdWHs offers a viable route toward high-performance 2D electronics for memoryand neuromorphic computing purposes.

关键词： 2D vdW heterostructure high-speed floating-gate transistor interlayer lithium intercalation engineering phase-engineered contact

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Directly Unveiling the Photothermal Corrosion of BiVO4 via In-situ Transmission Electron Microscopy

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Chemical Research in Chinese Universities 2025年第2期41卷 351-357页

作者： WANG Lindong SUN Jingyi WANG Lang LI Yu HU Zhiyi SU Baolian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering(ISME)Wuhan University of TechnologyWuhan 430070P.R.China Nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan 430070P.R.China CMI(Laboratory of Inorganic Materials Chemistry) University of Namurrue deBruxelles 61B-5000NamurBelgium

BiVO4(BVO)is widely utilized in photothermal catalysis because of its favorable bandgap structure(2.4 eV),excellent photo response capabilities and high thermal ***,the mechanism of BVO photothermal corrosion still remains unclear due to the lack of visualized characterization on the degradation process in real ***,we directly unveil the photothermal-induced microstructural evolution of BVO through in-situ heating(scanning)transmission electron microscopy[(S)TEM].The results indicate that the electrons are the initiating condition(“switch”)for the photothermal corrosion of BVO,resulting in the precipitation of Bi and reduction of V5+to V3+in the substrate,while the thermal field facilitates the evaporation of Bi and the recrystallization of *** work sheds light on the mechanism of BVO photothermal corrosion in dynamics and provides significant insights into the photothermal synergistic effects.

关键词： BiVO4 Photothermal corrosion In-situ transmission electron microscopy(TEM) Photothermal catalysis Structural evolution

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Interfacial and Vacancies Engineering of Copper Nickel Sulfide for Enhanced Oxygen Reduction and Alcohols Oxidation Activity

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Energy & Environmental Materials 2023年第5期6卷 288-298页

作者： Zhaoyang Wang Xiaobin Liao Min Zhou Fuzhi Huang Kwadwo Asare Owusu Jiantao Li Zifeng Lin Qi Sun Xufeng Hong Congli Sun Yibing Cheng Yan Zhao Liqiang Mai State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and Engineering Wuhan University of TechnologyNo.122 Luoshi RoadWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China The Institute of Technological Sciences Wuhan UniversityWuhan 430072China Department of Materials Science and Engineering Monash UniversityClayton Victoria 3800Australia Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen ValleyFoshan 528216China

Rational design and construction of highly efficient nonprecious electrocatalysts for oxygen reduction and alcohols oxidation reactions(ORR,AOR)are extremely vital for the development of direct oxidation alkaline fuel cells,metal-air batteries,and water electrolysis system involving hydrogen and value-added organic products generation,but they remain a great ***,a bifunctional electrocatalyst is prepared by anchoring CuS/NiS_(2)nanoparticles with abundant heterointerfaces and sulfur vacancies on graphene(Cu_(1)Ni_(2)-S/G)for ORR and *** from the synergistic effects between strong interfacial coupling and regulation of the sulfur vacancies,Cu_(1)Ni_(2)-S/G achieves dramatically enhanced ORR activity with long term ***,when ethanol is utilized as an oxidant for AOR,an ultralow potential(1.37 V)at a current density of 10 mA cm-2 is achieved,simultaneously delivering a high Faradaic efficiency of 96%for ethyl acetate ***_(1)Ni_(2)-S/G also exhibits catalytic activity for other alcohols electrooxidation process,indicating its *** work not only highlights a viable strategy for tailoring catalytic activity through the synergetic combination of interfacial and vacancies engineering,but also opens up new avenues for the construction of a self-driven biomass electrocatalysis system for the generation of value-added organic products and hydrogen under ambient conditions.

关键词： alcohols oxidation reaction heterointerface metal sulfide oxygen reduction reaction sulfur vacancies

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Stretchable polymer composites with ultrahigh piezoelectric performance

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National Science Review 2023年第8期10卷 203-210页

作者： Tongxiang Tang Zhonghui Shen Jian Wang Shiqi Xu Jiaxi Jiang Jiahui Chang Mengfan Guo Youjun Fan Yao Xiao Zhihao Dong Houbing Huang Xiaoyan Li Yihui Zhang Danyang Wang Long-Qing Chen Ke Wang Shujun Zhang Ce-Wen Nan Yang Shen State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices Wuhan University of Technology Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Applied Mechanics Laboratory Department of Engineering Mechanics Tsinghua University Center for Flexible Electronics Technology Tsinghua University School of Materials Science and Engineering University of New South Wales Department of Materials Science and Engineering The Pennsylvania State University State College Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of Wollongong

Flexible piezoelectric materials capable of withstanding large deformation play key roles in flexible electronics. Ferroelectric ceramics with a high piezoelectric coefficient are inherently brittle, whereas polar polymers exhibit a low piezoelectric coefficient. Here we report a highly stretchable/compressible piezoelectric composite composed of ferroelectric ceramic skeleton, elastomer matrix and relaxor ferroelectric-based hybrid at the ceramic/matrix interface as dielectric transition layers, exhibiting a giant piezoelectric coefficient of 250 picometers per volt, high electromechanical coupling factor keff of 65%,ultralow acoustic impedance of 3MRyl and high cyclic stability under 50% compression strain. The superior flexibility and piezoelectric properties are attributed to the electric polarization and mechanical load transfer paths formed by the ceramic skeleton, and dielectric mismatch mitigation between ceramic fillers and elastomer matrix by the dielectric transition layer. The synergistic fusion of ultrahigh piezoelectric properties and superior flexibility in these polymer composites is expected to drive emerging applications in flexible smart electronics.

关键词： polymer composites piezoelectric materials structure design flexible electronics

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Valorization of spent lithium-ion battery cathode materials for energy conversion reactions

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Green Energy and Environment 2025年

作者： Zhang, Jin Chen, Ding Jiao, Jixiang Zeng, Weihao Mu, Shichun State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

With large-scale commercial applications of lithium-ion batteries (LIBs), lots of spent LIBs will be produced and cause huge waste of resources and greatly increased environmental problems. Thus, recycling spent LIB materials is inevitable. Due to high added-value features, converting spent LIB cathode materials into catalysts exhibits broad application prospects. Inspired by this, we review the high-added-value reutilization of spent LIB materials toward catalysts of energy conversion. First, the failure mechanism of spent LIB cathode materials are discussed, and then the transformation and modification strategies are summarized and analyzed to improve the transformation efficiency of failed cathode materials and the catalytic performance of catalysts, respectively. Moreover, the electrochemical applications of failed cathode material derived catalysts are introduced, and the key problems and countermeasures are analyzed and proposed. Finally, the future development trend and prospect of high-added-value reutilization for spent LIB cathode materials toward catalysts are also given. This review will predictably advance the awareness of valorizing spent lithium-ion battery cathode materials for catalysis. © 2024 Institute of Process Engineering, Chinese Academy of Sciences

关键词： Lithium-ion batteries

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