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Enhanced thermoelectric performance and atomic-resolution interfacial structures in BiSbTe thermo-electro-magnetic nanocomposites incorporating magnetocaloric LaFeSi nanoparticles

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Journal of Materiomics 2021年第5期7卷 998-1006页

作者： Lin Xing Wenjun Cui Xiahan Sang Fengxia Hu Ping Wei Wanting Zhu Xiaolei Nie Qingjie Zhang Wenyu Zhao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China NRC(Nanostructure Research Centre) Wuhan University of TechnologyWuhan430070China State Key Laboratory for Magnetism Institute of PhysicsChinese Academy of SciencesBeijing100190China

Incorporating magnetic nanoparticles in thermoelectric(TE)materials introduce magnetic interfaces with additional electron and phonon scattering mechanism for high TE ***,the influence of heterogeneous interfaces between magnetic nanoparticles and TE matrix on electronic and thermal transport remains elusive in the thermo-electric-magnetic ***,using p-type TE material Bi_(0.3)Sb_(1.7)Te_(3)(BST)as matrix and magnetocaloric(MC)material La(Fe_(0.92)Co_(0.08))_(11.9)Si_(1.1)(LFS)nanoparticles as a second phase,TE/MC nanocomposites xLFS/BST(x=0.1%,0.2%,0.3% and 0.4%)were synthesized using spark plasma sintering *** atomic-resolution interfacial structures demonstrate that Te vacancies originating from LFS-BST interfacial reaction decreases the hole concentration of the LFS/BST nanocomposites and enhances the Seebeck *** LFS/BST nanocomposites exhibit lower thermal conductivity due to enhanced phonon scattering by interfaces and *** the nanocomposites have higher ZT than BST matrix,with 0.2% LFS/BST nanocomposite achieving highest ZT=1.11 at 380 *** working current 1.4 A,the device fabricated using 0.2% LFS/BST nanocomposite achieves maximal cooling temperature 4.9 K,which is 58% higher than the ***,the MC properties are retained in all the nanocomposites,which make them a promising candidate to achieve high TE performance and dual TE/MC properties for future applications.

关键词： Thermoelectrics Magnetocaloric materials Bi_(2)Te_(3)La(Fe,Si)_(13) Microstructure Thermoelectric properties

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Er:CaF2 Crystal and Laser Ceramic: a Comparative Study

Er:CaF2 Crystal and Laser Ceramic: a Comparative Study

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2024 advanced Solid state Lasers, ASSL 2024

作者： Normani, Simone Loiko, Pavel Gan, Shiyan Li, Weiwei Mei, Bingchu Benayad, Abdelmjid Jambunathan, Venkatesan Braud, Alain Chen, Weidong Camy, Patrice UMR 6252 CEA-CNRS-ENSICAEN Université de Caen Normandie 6 Boulevard Maréchal Juin Caen14050 Cedex 4 France State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou350002 China

Spectroscopy and mid-infrared laser performance are compared for Er:CaF2 single-crystal and hot-pressed transparent *** 2.8-µm Er:CaF2 crystal laser delivers 0.81 W with 32.6% slope efficiency and outperforms the... 详细信息

关键词： Single crystals

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In situ STEM Observation of Cation Diffusion and Surface Reconstruction at van der Waals Gaps

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Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2023年第1期29卷 1642-1643页

作者： Cui, Wenjun Lin, Weixiao Lu, Weichao Liu, Chengshan Gao, Zhixiao Ma, Hao Zhao, Wen Van Tendeloo, Gustaaf Sang, Xiahan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Nanostructure Research Center Wuhan University of Technology Wuhan China School of Materials Science and Engineering China University of Petroleum (East China) Qingdao Shandong China Electron Microscopy for Materials Science (EMAT) University of Antwerp Antwerp Belgium

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Achieving enhanced thermoelectric and mechanical performance in p-type bismuth telluride through constrained hot deformation

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Ceramics International 2025年

作者： Chen, Quansheng Ji, Chen Yu, Jian Hua, Lin Zhao, Wenyu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Jiujiang University Jiujiang332005 China Hubei Key Laboratory of Advanced Technology for Automobile Components Wuhan University of Technology Wuhan430070 China

Bi2Te3-based alloys remain the only commercially available thermoelectric (TE) materials. However, their practical applications are severely constrained by the inferior mechanical performance of the zone melting (ZM) ingot. Herein, a simple constrained hot deformation (CHD) technology was developed to prepare the p-type Bi0.5Sb1.5Te3 polycrystalline materials derived from ZM ingots. It was discovered that the deformation process has negligible impact on the phase composition, but can efficiently refine the grains to approximately 5 μm through the dynamic recrystallization and simultaneously introduce high-density dislocations. Although the donor-like effect induced by deformation would obviously deteriorate the electrical conductivity, the recovery effect triggered by high deformation temperature can effectively optimize the carrier concentration and thus alleviate the degradation of power factor. The material deformed at 773 K maintains a relatively high power factor ∼3.33 mW K−2 m−1 at 300 K, together with a significantly decreased lattice thermal conductivity ∼0.59 W m−1 K−1, and an improved zT ∼1.1 was obtained ultimately. More importantly, the deformed materials show a significant improvement in mechanical performance due to the grain refinement. A maximum average Vickers hardness of 0.67 GPa was achieved for the material deformed at 723 K, which is ∼40 % higher than that of the ZM ingot. Our work indicates the simple CHD is an efficient technology to synergistically enhance both TE and mechanical properties of Bi2Te3-based ZM ingot. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Polycrystalline materials

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Design and Characterization of 3d Printed Gradient Scaffolds with Spatial Distribution of Pore Sizes

SSRN

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SSRN 2024年

作者： Ye, Fan Yang, He Hong, Chuhang Wu, Xiaopei Dai, Honglian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National energy key laboratory for new hydrogen-ammonia energy technologies Foshan Xianhu Laboratory Foshan528200 China

In bone repair, scaffold structural design is essential for optimizing mechanical performance and osteogenic potential. Gradient structural scaffolds are engineered to balance mechanical qualities and permeability which can improve the material transport capacity of scaffolds. This study designed and fabricated gradient structural scaffolds with spatially distributed pore size, and investigated their mechanical and fluid dynamics properties, coupled with in vitro osteogenic experiments to understand the impact of pore size distribution. The results indicated that, compared to traditional uniform pore scaffolds, gradient scaffolds exhibited a significant increase in mechanical strength, fluid permeability, and in vitro osteogenic activity. To sum up, the gradient scaffolds demonstrated better comprehensive performance and potential for use in the structural design of bone repair scaffolds, offering an important reference value for the three-dimensional structural design of scaffolds. © 2024, The Authors. All rights reserved.

关键词： 3D printing

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Ammonium Ion and Structural Water Co-Assisted Zn^(2+) Intercalation/De-Intercalation in NH_(4)V_(4)O_(10)∙0.28H_(2)O

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Chinese Journal of Chemistry 2021年第7期39卷 1885-1890页

作者： Ting Zhu Bo Mai Ping Hu Ziang Liu Congcong Cai Xuanpeng Wang Liang Zhou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanHubei430070 China Department of Physical Science&Technology School of ScienceWuhan University of TechnologyWuhanHubei430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshanGuangdong528200 China

Main observation and conclusion The cathode material plays a crucial role in the performances of aqueous zinc-ion batteries(ZIBs).Herein,we report an ammonium vanadate(NH_(4)V_(4)O_(10)∙0.28H_(2)O,NHVO)aqueous ZIB cat... 详细信息

关键词： Aqueous zinc-ion battery Cathode material Vanadates Zincates Electrochemistry

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Design and Characterization of 3d Printed Gradient Scaffolds with Spatial Distribution of Pore Sizes

SSRN

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SSRN 2024年

作者： Ye, Fan Yang, He Hong, Chuhang Wu, Xiaopei Dai, Honglian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China

In bone repair, scaffold structural design is essential for optimizing mechanical performance and osteogenic potential. Gradient structural scaffolds are engineered to balance mechanical qualities and permeability which can improve material transport capacity of scaffolds. This study designed and fabricated gradient structural scaffolds with spatially distributed pore size, and investigated their mechanical and fluid dynamics properties, coupled with in vitro osteogenic experiments to understand the impact of pore size distribution. The results indicated that, compared to traditional uniform pore scaffolds, gradient scaffolds exhibited a significant increase in mechanical strength, fluid permeability, and in vitro osteogenic activity. To sum up, the gradient scaffolds demonstrated better comprehensive performance and potential for use in the structural design of bone repair scaffolds, offering an important reference value for the three-dimensional structural design of scaffolds. © 2024, The Authors. All rights reserved.

关键词： 3D printing

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Maximum Power Point Tracking Using a Multimode Hunter-Prey Optimization Algorithm for Gradually Varying Power in Centralized Thermoelectric Generation System

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Energy technology 2025年第0期

作者： Zhu, Wenchao Li, Peng Yang, Wenlong Xie, Changjun Li, Hao Yang, Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan430070 China School of Automation Wuhan University of Technology Wuhan430070 China Wuhan Industrial Technology Institute of Artificial Intelligence and New Energy Vehicles Wuhan430119 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

The unstructured power outputs from thermoelectric generator (TEG) systems have precipitated the advancement of maximum power point tracking (MPPT) methods toward more intelligent solutions. This article concentrates on centralized TEG systems which work during nonuniform distribution of temperature cases and introduce the hunter-prey optimization algorithm with multimode updating (MMUHPO). Existing MPPT methods based on metaheuristic algorithms pay attention to improving tracking speed, efficiency, oscillation, and call frequency. However, in scenarios marked by gradual changes in power characteristics, the precision of MPPT algorithms can lead to frequent oscillatory searches and elevated computational demands. MMUHPO reduces power loss and simplifies algorithm complexity by improving the original mechanism and introducing termination mechanism and multimode update mechanism. Herein, the proposed algorithm is compared with several widely used MPPT algorithms based on metaheuristic algorithms under five different operating conditions. Remarkably, the MMUHPO algorithm demonstrates a substantial enhancement in energy collection efficiency, with the increase in efficiency reaching up to 109.8%. Finally, real-time data simulation experiments corroborate the exceptional tracking performance of the proposed algorithm. © 2025 Wiley-VCH GmbH.

关键词： Heuristic algorithms

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A superior strength-ductility synergy of Al_(0.1)CrFeCoNi high-entropy alloy with fully recrystallized ultrafine grains and annealing twins

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Journal of materials Science & technology 2022年第36期131卷 185-194页

作者： Jiahao Li Kejie Lu Xiaojun Zhao Xinkai Ma Fuguo Li Hongbo Pan Jieming Chen Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Shenzhen Institute of Southwest Jiaotong University Shenzhen 518000China State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Anhui Province Key Laboratory of Metallurgical Engineering&Resources Recycling(Anhui University of Technology) 243002 MaanshanChina Luoyang Ship Material Research Institute Luoyang 471023China

Grain refinement usually makes the materials stronger,while ductility has a dramatic ***,a superior tensile strength–ductility synergy in a fully recrystallized ultrafine-grained(UFG)Al_(0.1)CrFeCoNi with abundant annealing twins was achieved by cold rolling at room temperature and short-time *** microstructure characterization using electron backscattered scattering diffraction demonstrates that abundant geometrically necessary dislocations(GNDs)gather around the grain boundaries and twin boundaries after tensile *** coarse-grained(CG)samples undergo a larger plastic deformation than UFG samples,the GND density decreases with grain size ranging from UFG to *** electron microscopy results reveal that the annealing twin boundary,which effectively hinders the dislocation slip and stores dislocation in grain interior,and the activation of multiple deformation twins are responsible for the superior strength–ductility synergy and work hardening *** addition,the yield strength of fully recrystallized Al_(0.1)CrFeCoNi follows a Hall–Petch relationship(σ_y=24+676d^(–1/2)),where d takes into account both grain boundaries and annealing twin *** strengthening effects of grain boundaries and annealing twin boundaries were also evaluated separately.

关键词： High-entropy alloy Ultrafine grains Annealing twins Strength Ductility

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Ultra-High-Performance Aluminum-Based Hybrid Supercapacitors Prepared for Nitrogen-Doped Micro-Mesoporous Carbon Sphere

SSRN

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SSRN 2023年

作者： Sun, Weiyi Xing, Lingli Zhang, Bomian Shi, Wenchao Ren, Jingke Zhang, Xinyu Xiong, Fangyu An, Qinyou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Xiangyang441000 China

Aluminum-based devices are promising candidates for the next generation of energy storage due to the advantages of high energy density, high safety, and low cost. The aluminum ion batteries (AIBs) are based on the electrochemical intercalation/deintercalation reactions against the electrodes, but the selection of the cathode is limited to present. The cathode reactions of cation-type AIBs are plagued by the poor kinetics of solid-state diffusion from high charge density of Al3+ and anion-type AIBs show poor capacity due to the intercalation of large-sized chloroaluminate (AlCl4−) active ions into the cathode. Here, we deliberately adopted a hybrid capacitor-battery mechanism and employed a nitrogen-doped micro-mesoporous carbon sphere of a high specific area as the cathode and aluminum as the anode to construct an aluminum-based energy storage device. After optimization, it exhibits an excellent discharge capacity of 224 mA h g−1 at a current density of 300 mA g−1, and exceptional cycling performance with a discharge capacity as high as 114 mA h g−1 at 10 A g−1 after 35000 cycles. The ultra-high-performance aluminum-based hybrid supercapacitor (Al-HSC) may lead to a new direction for the development of aluminum-based energy storage devices. © 2023, The Authors. All rights reserved.

关键词： Aluminum

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