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Enhanced performance of crystalline argyrodite Ag8SnSe6 based thermoelectric materials via one-step plasma activated sintering

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Journal of Alloys and Compounds 2025年 1031卷

作者： Melzi, Bachir Yang, Dongwang Zhang, Mingqi Jianan, Lyu Cui, Jingjing Gou, Weijie Zhong, Shenlong Yan, Yonggao Tang, Xinfeng Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

AgSnSe-based materials are currently becoming prominent as thermoelectric materials with advantageous characteristics at room and medium temperatures. These materials are generally obtained through standard techniques such as melting, annealing, and sintering, which require substantial amounts of energy and time. In this study, we produced Ag8SnSe6 bulks by using a non-equilibrium technique called one-step plasma-activated sintering, using raw elemental powders as starting materials. We achieved the formation of the orthorhombic Ag8SnSe6 phase in polycrystalline form at 873 K, which allowed us to investigate the influence of sintering temperature on the microstructural characteristics. Higher sintering temperatures resulted in an increase in phase purity and a decrease in the presence of secondary phase. In addition, we conducted a study on Ag8-x Sn1+xSe6 (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) to investigate the influence of the fraction of Ag/Sn on the phase and thermoelectric properties. The samples exhibited excellent purity with minimal presence of Ag2Se precipitates, and the maximum thermoelectric figure of merit (zT) attained was 1.2. This accelerated synthesis method offers a significant advantage for large-scale manufacturing. © 2025 Elsevier B.V.

关键词： Polycrystalline materials

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Enhanced polysulfide redox kinetics by niobium oxynitrides via insitu adsorptive and catalytic effect in wide temperature range

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Nano Research 2022年第7期15卷 6200-6207页

作者： Benben Wei Chaoqun Shang Qiao Cu Le Hu Xuelian Fu Guofu Zhou Xin Wang School of Materials Science and Engineering&Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Wuhan Institute of TechnologyWuhan 430205China Faculty of Materials Science and Chemistry China University of GeosciencesWuhan 430074China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&South China Academy of Advanced Optoelectronics South China Normal UniversityGuangzhou 510006China School of Materials Science and Engineering&State Key Laboratory of Material Processing and Die and Mold Technology Huazhong University of Science and TechnologyWuhan 430074China

The development of Li-S batteries(LSBs)is hindered by the low utilization of S species and sluggish redox reaction *** metal oxides always possess high adsorption to polar S species,while conductive metal nitrides show fast electron transport and ensure fast redox reaction of S *** combination merits of metal oxides and metal nitrides in one provide an effective strategy to improve the electrochemical performance of *** this work,defect design of niobium oxynitrides highly dispersed on graphene(NbON-G)is evaluated as effective trapper and catalyst for S *** to the effective structural merits including enriched active sites,alleviated volume variation,defect modulated electronic property,and in-situ chemisorption and catalytic conversion of soluble lithium polysulfides(LiPSs),the LSBs with NbON-G modified separator show remarkably enhanced performance compared to NbN-G and Nb_(2)O_(5)-***,even at low temperature of−40°C,the LSBs with NbON-G can operate for 1,000 cycles with 0.04%capacity decay per cycle(Rate:2 C).

关键词： lithium polysulfides Li-S batteries niobium oxynitrides catalyst low temperature

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Image processing based three-dimensional model reconstruction for cross-platform numerical simulation

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China Foundry 2023年第2期20卷 139-147页

作者： Yu-cheng Sun Yu-hang Huang Na Li Xiao Han Ai-long Jiang Jin-wu Kang Ji-wu Wang Hai-liang Yu State Key Laboratory of Engine Reliability Weichai Power Co.Ltd.Weifang 261061ShandongChina School of Mechanical Engineering Central South UniversityChangsha 41000China School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Key Laboratory for Advanced Materials Processing Technology School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Numerical simulation is the most powerful computational and analysis tool for a large variety of engineering and physical *** a complex problem relating to multi-field,multi-process and multi-scale,different computing tools have to be developed so as to solve particular fields at different scales and for different ***,the integration of different types of software is ***,it is difficult to perform the transfer of the meshes and simulated results among software packages because of the lack of shared data formats or encrypted data *** image processing based method for three-dimensional model reconstruction for numerical simulation was proposed,which presents a solution to the integration problem by a series of slice or projection images obtained by the post-processing modules of the numerical simulation *** means of mapping image pixels to meshes of either finite difference or finite element models,the geometry contour can be extracted to export the stereolithography *** values of results,represented by color,can be deduced and assigned to the *** the models with data can be directly or indirectly integrated into other software as a continued or new numerical *** three-dimensional reconstruction method has been validated in numerical simulation of castings and case studies were provided in this study.

关键词： cross-platform numerical simulation 3D model reconstruction image processing slice

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Microstructure evolution and mechanical properties of Al_(2)O_(3)foams via laser powder bed fusion from Al particles

Advanced Powder Materials

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advanced Powder materials 2023年第4期2卷 114-123页

作者： Ye Dong Annan Chen Ting Yang Shuai Gao Shuning Liu Bingjian Guo Hongyi Jiang Yusheng Shi Chunze Yan School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministry of EducationWuhan 430074China Centre for Advanced Structural Materials Department of Mechanical EngineeringCity University of Hong KongHong KongChina

Laser powder bed fusion(LPBF)combined with reaction bonding(RB)of Al particles is an effective method for preparing high-performance 3D Al_(2)O_(3) ceramic ***,the indistinct microstructure evolution hinders the regulation of pore features and the improvement of synthetic ***,the microstructure evolution of the Al_(2)O_(3) ceramic foams during the LPBF/RB process is clariﬁed by various characterization methods,and the corresponding mechanical property modulation is realized by optimizing LPBF parameters,organic binder(E12 epoxy resin)content,heating rate,sintering time,and coral-like Al_(2)O_(3) *** expansion from Al_(2)O_(3) outward growth and Al granule precipitation counteracts the shrinkage from E12 decomposition and Al_(2)O_(3) sintering,resulting in an ultra-low shrinkage of 0.94%–3.01%.The pore structures of particle packing pores,hollow spheres,and microporous structures allow a tunable porosity of 52.6%–73.7%.The in-situ formation of multi-scale features including hollow spheres,ﬂaky grains,whiskers,nanoﬁbers,and bond bridges brings about a remarkably high bending strength of 6.5–38.3 ***ﬁndings reveal the relationship between microstructure evolution and property optimization of high-performance ceramic foams,with potential signiﬁcance for microstructure design and practical application.

关键词： Al_(2)O_(3)ceramic foams Laser powder bed fusion Reaction bonding Microstructure evolution Mechanical property modulation

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(K, Na)NbO3-based lead-free piezoceramics: one more step to boost applications

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National Science Review 2022年第10期9卷 13-15页

作者： Huan Liu Yi-Xuan Liu Aizhen Song Qian Li Yang Yin Fang-Zhou Yao Ke Wang Wen Gong Bo-Ping Zhang Jing-Feng Li State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University School of Materials Science and Engineering University of Science and Technology Center of Advanced Ceramic Materials and Devices Yangtze Delta Region Institute of Tsinghua University

Piezoelectric materials, as a conversion medium between mechanical and electrical energies, are widely used in actuators, sensors and sonar ***-based materials represented by lead zirconate titanate(PZT) have dominate...

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Band convergence boosted high thermoelectric performance of Zintl compound Mg_(3)Sb_(2) achieved by biaxial strains

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Journal of Materiomics 2022年第5期8卷 1086-1094页

作者： Suiting Ning Shan Huang Ziye Zhang Ning Qi Man Jiang Zhiquan Chen Xinfeng Tang Hubei Nuclear Solid Physics Key Laboratory Department of PhysicsWuhan UniversityWuhan430072China Department of Nuclear Engineering and Technology School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan430073China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

Mg_(3)Sb_(2) as a Zintl compound is a promising thermoelectric material with the intrinsically low lattice thermal conductivity and excellent n-type electrical properties,but its p-type electrical transport properties are ***,the thermoelectric performance of Mg_(3)Sb_(2) under the effect of biaxial strain is investigated by using first-principles method and Boltzmann transport *** application of biaxial strain enables tuning the band structure of Mg_(3)Sb_(2) in such a way that the band degeneracy of both the conduction band and valence band *** the biaxial strain increases,the Seebeck coefficient of ptype Mg_(3)Sb_(2) has a remarkable increase,leading to a significant improvement in power *** is mainly ascribed to the achievement of valence band orbital ***,the lattice thermal conductivity exhibits very slight biaxial strain dependence within the strain range considered in this work,which increases from 1.28 to 1.62 W m^(-1) K^(-1) at 300 ***,the highest ZT of p-type Mg_(3)Sb_(2) at 700 K can be up to 2.6 along the in-plane direction under-2.5%biaxial strain,which is almost three times that of the unstrained *** realization of high thermoelectric performance of p-type Mg_(3)Sb_(2) will promote its practical applications as thermoelectric generators.

关键词： Thermoelectric First-principles Crystal field splitting energy Band convergence

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materials and devices for high‐density,high‐throughput micro‐electrocorticography arrays

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Fundamental Research 2025年第1期5卷 17-28页

作者： Yang Xie Yanxiu Peng Jinhong Guo Muyang Liu Bozhen Zhang Lan Yin He Ding Xing Sheng Department of Electronic Engineering Beijing National Research Center for Information Science and TechnologyInstitute for Precision MedicineLaboratory of Flexible Electronics TechnologyIDG/McGovern Institute for Brain ResearchTsinghua UniversityBeijing 100084China Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering The Key Laboratory of Advanced Materials of Ministry of EducationState Key Laboratory of New Ceramics and Fine ProcessingLaboratory of Flexible Electronics TechnologyTsinghua UniversityBeijing 100084China

The pursuit of precisely recording and localizing neural activities in brain cortical regions drives the development of advanced electrocorticography(ECoG)*** progress has led to the emergence of micro-ECoG(μECoG)devices with sub-millimeter *** review presents the current research status,development directions,potential innovations and applications of high-density,high-throughputμECoG ***,we summarize the challenges associated with accurately recording single or multiple neurons using existingμECoG devices,including passive multielectrode and active transistor ***,we focus on cutting-edge advancements in passiveμECoG devices by discussing the design principles and fabrication strategies to optimize three key parameters:impedance,mechanical flexibility,and ***,recent findings highlight the need for further research and development in active transistor arrays,including silicon,metal oxide,and solution-gated *** active transistor arrays have the potential to unlock the capabilities of high-density,high-throughputμECoG devices and overcome the limitations of passive multielectrode *** review explores the potential innovations and applications ofμECoG devices,showcasing their effectiveness for both brain science research and clinical applications.

关键词： Electrocorticography Micro-electrocorticography Flexible electronics Bioelectronics Neural electrode array

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Solar-driven H_(2)O_(2)production by S-scheme heterojunction photocatalyst

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Chinese Journal of Catalysis 2025年第5期72卷 24-47页

作者： Han Li Wang Wang Kaiqiang Xu Bei Cheng Jingsan Xu Shaowen Cao School of Automotive Materials Hubei University of Automotive TechnologyShiyan 442020HubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Hubei Technology Innovation Center for Advanced Composites Wuhan University of TechnologyWuhan 430070HubeiChina School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China School of Chemistry and Physics&Centre for Materials Science Queensland University of TechnologyBrisbaneQueensland 4001Australia

Hydrogen peroxide(H_(2)O_(2)),as an essential and green chemical,is extensively used in energy and environmental ***,the production of H_(2)O_(2)primarily relies on the anthraquinone method,which is an energy-intensive method involving multi-step reactions,producing harmful by-product ***-driven H_(2)O_(2)production,an alternative route for H_(2)O_(2)generation,is a green and sustainable technology since it only utilizes water and oxygen as ***,the rapid recombination of charge carriers as well as insufficient redox capability limit the photocatalytic H_(2)O_(2)production *** step-scheme(S-scheme)heterojunction photocatalysts has been regarded as an effective strategy to address these drawbacks because it not only achieves spatially separated charge carriers,but also preserves redox capability of the photocatalytic *** paper covers the recent advances of S-scheme heterojunction photocatalysts for H_(2)O_(2)production in terms of basic principles,characterization techniques,and preparation ***,the mechanism and advantages of S-scheme heterojunction for photocatalytic H_(2)O_(2)generation are systematically *** recent S-scheme heterojunction designs,including inorganic-organic heterojunction,inorganic-inorganic heterojunction,and organic-organic heterojunction,are ***,the challenges and research directions of S-scheme photocatalysts for H_(2)O_(2)generation are presented.

关键词： Step-scheme heterojunction H_(2)O_(2)photosynthesis Charge migration mechanism Solar conversion

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In-situ physical/chemical cross-linked hydrogel electrolyte achieving ultra-stable zinc anode-electrolyte interface towards dendrite-free zinc ion battery

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Journal of Energy Chemistry 2024年第10期97卷 342-351,I0007页

作者： Chen-Yang Li Jiang-Lin Wang Dong-Ting Zhang Min-Peng Li Hao Chen Wei-Hai Yi Xin-Ying Ren Bao Liu Xue-Feng Lu Mao-Cheng Liu State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050GansuChina School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050GansuChina Chaowei Power Group Co. LTDChangxing 313100ZhejiangChina School of Vehicle Engineering Jiangsu UniversityNanjing 210031jiangsuChina

Hydrogen evolution reaction(HER),zinc corrosion,and dendrites growth on zinc metal anode are the major issues limiting the practical applications of zinc-ion ***,an in-situ physical/chemical cross-linked hydrogel electrolyte(carrageenan/polyacrylamide/ZnSO_(4),denoted as CPZ)has been developed to stabilize the zinc anode-electrolyte interface,which can eliminate side reactions and prevent dendrites *** in-situ CPZ hydrogel electrolyte improves the reversibility of zinc anode due to eliminating side reactions caused by active water ***,the electrostatic interaction between the SO_(4)^(-)groups in CPZ and Zn^(2+)can encourage the preferential deposition of zinc atoms on(002)crystal plane,which achieve dendrite-free and homogeneous zinc *** in-situ hydrogel electrolyte offers a streamlined approach to battery manufacturing by allowing for direct integration into the ***,the Zn//Zn half battery with CPZ hydrogel electrolyte can enable an ultra-long cycle over 5500 h at a current density of 0.5 mA cm^(-2),and the Zn//Cu half battery reach an average coulombic efficiency of 99.37%.The Zn//V_(2)O_5-GO full battery with CPZ hydrogel electrolyte demonstrates94.5%of capacity retention after 2100 *** study is expected to open new thought for the development of commercial hydrogel electrolytes for low-cost and long-life zinc-ion batteries.

关键词： In-suit CPZ hydrogel electrolyte Hydrogen evolution reaction and zinc corrosion Dendrites growth Zinc anode-electrolyte interface Zn ion batteries

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Integrating thin wall into block:A new scanning strategy for laser powder bed fusion of dense tungsten

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Journal of materials Science & technology 2022年第25期120卷 167-171页

作者： Zhengang Xiong Ji Zou Zhaoyang Deng Jinhan Chen Wei Liu Yuchi Fan Minshi Wang Xiaoqing Zhao Chunfeng Yu Dongdong Dong Wenyou Ma Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Institute of Functional Materials Donghua University201620China School of Metallurgy and Materials University of BirminghamBeijing 100084China

Due to a combination of outstanding properties including high melting point,high density,low thermal expansion coefficient,low saturated vapor pressure and excellent thermal conductivity,tungsten(W)parts have been widely used as electrodes,heating elements,anti-scatter grids for Computed Tomography(CT)equipment,rocket nozzles and divertor materials for nuclear fusion[1].

关键词： powder thermal saturated

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