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SSRN 2024年

作者： Du, Ao Chen, Hongmei Chen, Jie Wang, Bo Cai, Zeyun Qiu, Huajun Xie, Guoqiang Shenzhen518055 China Shenzhen Joywind New Materials Co. Ltd Shenzhen518109 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application Harbin Institute of Technology Shenzhen518055 China Shenzhen518055 China

Due to the exceptional flame retardancy, environmental protection, cost-effectiveness and ease of processing, halogen-free flame-retardant polyethylene composites are attracting wide attention. However, the addition of halogen-free flame retardants usually leads to significantly decreased mechanical properties of polyethylene composites, which greatly limits its application. Herein, we report a halogen-free flame-retardant polyethylene/ethylene-vinyl acetate copolymer composite (PE/EVA) with excellent flame retardancy and mechanical properties by combining compatibilizer, crosslinking agent and carbon fiber. The presence of compatibilizer not only improves the compatibility of halogen-free flame retardants and matrix, but also interacts with the crosslinking agent to form a cladding structure on the surface of carbon fiber. The enhanced interaction between carbon fiber surface and matrix then results in significantly enhanced flame retardancy and mechanical properties of the composite. Specifically, adding 4 phr compatibilizer, 0.5 phr crosslinking agent and 10 phr carbon fiber will lead to the halogen-free flame-retardant PE/EVA composite with a UL-94 V1 rating and an increased tensile strength by 84.02% reaching 19.12 MPa. Moreover, further carbon fiber surface modification can further enhance the flame retardancy of the composite probably due to a synergistic flame-retardant effect caused by the surface modified nitrogen and silicon elements. As a result, the composite achieves a UL-94 V0 rating with well-retained high tensile strength of 15.19 MPa. This work provides a practical strategy for enhancing the flame retardancy and mechanical property of polyethylene-based composite simultaneously. © 2024, The Authors. All rights reserved.

关键词： Polyethylenes

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Sponge-based FeSx triggers enhanced and durable water decontamination from Cr(VI): Accelerated electron transfer and slow-releasing property

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Environmental research 2025年 283卷 122119页

作者： Shou Mei Longjie Liu Yiqing Du Rongling Wang Ziyi Zhan Aoxue Qin Shenglan Zhao Yuxuan Ye Yuwei Deng Qiang Li Fei Pan School of Resources and Environment Wuhan Textile University Wuhan 430200 China. School of Resources and Environment Wuhan Textile University Wuhan 430200 China State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan 430200 China. Electronic address: yxye@***. State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan 430200 China. State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan 430200 China. Electronic address: fpan@***.

Developing strategies for efficient and durable reduction of Cr(VI) in wastewater is still a desirable and challenging task. Herein, we successfully load the iron-sulfur composite (FeS) uniformly on the melamine sponge (MS) through in-situ deposition to form a three-dimensional composite FeS/MS. Compared with typical iron minerals (e.g., FeS), FeS/MS was significantly better at removing Cr(VI) in water, with the removal rate increased from 14.78 % to 99.44 %. The reaction kinetics of FeS/MS (0.1011 min) was 37 times that of FeS (0.0027 min). SEM-EDS results showed that FeS was uniformly loaded on the sponge, forming a high density of active sites. XPS analysis displayed that the proportion of SO was increased from 39.22 % to 61.18 %, implying the involvement of FeS/MS in the reduction of Cr(VI). Tafel scanning and cyclic voltammetry (CV) results confirmed that the enhanced reduction performance was attributed to the accelerated electron transfer and sufficient electron supply capability. Additionally, the deposition of Cr(OH) on FeS/MS is evidenced to be responsible for eliminating total Cr from water. The influence of water chemistry, i.e., pH, Cr(VI) concentration, and co-existed substances, on Cr(VI) removal during FeS/MS treatment was systematically examined. The removal capacity of Cr(VI) in tap water, natural water, and industrial wastewater, is more than 90 %, suggesting a strong anti-interference ability of FeS/MS. The rapid flow dynamic simulation experiment demonstrates that FeS/MS can achieve efficient removal of Cr(VI) and slow-releasing of Fe. The removal rate of Cr(VI) reached 100 % in the first 10 cycles, whereas the final effluent concentration was only 0.14 mg/L. This study provides a rational design of corresponding approaches to deal with Cr(VI) pollution.

关键词： Cr (VI) removal FeS(x) Slow-release Sponge Water treatment

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Enabling highly efficient and broadband electromagnetic wave absorption by tuning impedance match in high-entropy transition metal diborides (HETMB_(2))

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Journal of advanced Ceramics 2021年第6期10卷 1299-1316页

作者： Weiming ZHANG Fu-Zhi DAI Huimin XIANG Biao ZHAO Xiaohui WANG Na NI Rajamallu KARRE Shijiang WU Yanchun ZHOU Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhou 450046China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key Lab of Education Ministry for Power Machinery and Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Zibo Firststar New Material Incorporated Co. Ltd.Zibo 255000China

The advance in communication technology has triggered worldwide concern on electromagnetic wave *** cope with this challenge,exploring high-performance electromagnetic(EM)wave absorbing materials with dielectric and magnetic losses coupling is urgently *** the EM wave absorbers,transition metal diborides(TMB2)possess excellent dielectric loss ***,akin to other single dielectric materials,poor impedance match leads to inferior ***-entropy engineering is expected to be effective in tailoring the balance between dielectric and magnetic losses through compositional ***,three HE TMB2 powders with nominal equimolar TM including HE TMB2-I(TM=Zr,Hf,Nb,Ta),HE TMB2-2(TM=Ti,Zr,Hf,Nb,Ta),and HE TMB2-3(TM=Cr,Zr,Hf,Nb,Ta)have been designed and prepared by one-step boro/carbothermal *** a result of synergistic effects of strong attenuation capability and impedance match,HE TMB2-1 shows much improved performance with the optimal minimum reflection loss(RL_(min))of-59.6 dB(8.48 GHz,2.68 mm)and effective absorption bandwidth(EAB)of 7.6 GHz(2.3 mm).Most impressively,incorporating Cr in HE TMB2-3 greatly improves the impedance match over 1-18 GHz,thus achieving the RLmin of-56.2 dB(8.48 GHz,2.63 mm)and the EAB of 11.0 GHz(2.2 mm),which is superior to most other EM wave absorbing *** work reveals that constructing high-entropy compounds,especially by incorporating magnetic elements,is effectual in tailoring the impedance match for highly conductive compounds,i.e.,tuning electrical conductivity and boosting magnetic loss to realize highly efficient and broadband EM wave absorption with dielectric and magnetic coupling in single-phase materials.

关键词： transition metal diboride(TMB2) high-entropy(HE)ceramics electronic structure microwave absorption dielectric and magnetic losses coupling

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Surface Doping *** Doping of Cathode materials for Lithium-Ion Batteries:A Review

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Electrochemical Energy Reviews 2022年第4期5卷 254-285页

作者： Huaming Qian Haoqi Ren Ying Zhang Xianfeng He Wenbin Li Jingjing Wang Junhua Hu Hong Yang Hirbod Maleki Kheimeh Sari Yu Chen Xifei Li Xi’an Key Laboratory of New Energy Materials and Devices Institute of Advanced Electrochemical Energy and School of Materials Science and EngineeringXi’an University of TechnologyXi’an 710048ShaanxiChina Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials Xi’an 710048ShaanxiChina Department of Mechanical and Materials Engineering University of Western OntarioLondonOntario N6A 5B9Canada State Center for International Cooperation On Designer Low‑Carbon and Environmental Materials(CDLCEM) Zhengzhou University100 Kexue AvenueZhengzhou 450001China Xi’an Safty Energy Technology Co. LtdXi’an 710005ShaanxiChina

To address the capacity degradation,voltage fading,structural instability and adverse interface reactions in cathode materi-als of lithium-ion batteries(LIBs),numerous modification strategies have been developed,mainly including coating and *** particular,the important strategy of doping(surface doping and bulk doping)has been considered an effective strategy to modulate the crystal lattice structure of cathode ***,special insights into the mechanisms and effectiveness of the doping strategy,especially comparisons between surface doping and bulk doping in cathode materials,are still *** this review,recent significant progress in surface doping and bulk doping strategies is demonstrated in detail by focusing on their inherent differences as well as effects on the structural stability,lithium-ion(Li-ion)diffusion and electrochemical properties of cathode materials from the following mechanistic insights:preventing the exposure of reactive Ni on the surface,stabilizing the Li slabs,mitigating the migration of transition metal(TM)ions,alleviating unde-sired structural transformations and adverse interface issues,enlarging the Li interslab spacing,forming three-dimensional(3D)Li-ion diffusion channels,and providing more active sites for the charge-transfer ***,insights into the correlation between the mechanisms of hybrid surface engineering strategies(doping and coating)and their influences on the electrochemical performance of cathode materials are provided by emphasizing the stabilization of the Li slabs,the enhancement of the surface chemical stability,and the alleviation of TM ion ***,the existing challenges and future perspectives in this promising field are indicated.

关键词： Lithium-ion batteries Cathode materials Surface doping Bulk doping Hybrid surface engineering Structural stability Lithium-ion diffusion

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Eutectic Electrolyte with Unique Solvation Structure for High-Performance Zinc-Ion Batteries (vol 62, 10.1002/anie.202303744, 2023)

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2023年第22期62卷 e202206717-e202206717页

作者： Geng, L. Meng, J. Wang, X. Han, C. Han, K. Xiao, Z. Huang, M. Xu, P. Zhang, L. Zhou, L. Mai, L. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 P. R. China Department of Physical Science & Technology School of Science Wuhan University of Technology Wuhan 430070 P. R. China Hubei Longzhong Laboratory Xiangyang 441000 P. R. Hubei China

Zinc-ion batteries (ZIB) present great potential in energy storage due to low cost and high safety. However, the poor stability, dendrite growth, and narrow electrochemical window limit their practical application. Herein, we develop a new eutectic electrolyte consisting of ethylene glycol (EG) and ZnCl2 for dendrite-free and long-lifespan ZIBs. The EG molecules participate in the Zn2+ solvation via coordination and hydrogen-bond interactions. Optimizing the ZnCl2/EG molar ratio (1 : 4) can strengthen intermolecular interactions to form [ZnCl(EG)]+ and [ZnCl(EG)2]+ cations. The dissociation–reduction of these complex cations enables the formation of a Cl-rich organic–inorganic hybrid solid electrolyte interphase film on a Zn anode, realizing highly reversible Zn plating/stripping with long-term stability of ≈3200 h. Furthermore, the polyaniline||Zn cell manifests decent cycling performance with ≈78 % capacity retention after 10 000 cycles, and the assembled pouch cell demonstrates high safety and stable capacity. This work opens an avenue for developing eutectic electrolytes for high-safety and practical ZIBs.

关键词： Deep Eutectic Solvents Dendrite-Free Zn Anodes Eutectic Electrolytes Solvation Structure Zinc-Ion Batteries

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Bound states in the continuum in all-dielectric metasurfaces with scaled lattice constants

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Science China(Physics,Mechanics & Astronomy) 2023年第12期66卷 101-109页

作者： Mimi Zhou Shaojun You Lei Xu Menghui Fan Jing Huang Wenbin Ma Mingzhe Hu Shengyun Luo Mohsen Rahmani Ya Cheng Lin Li Chaobiao Zhou Lujun Huang Andrey E.Miroshnichenko School of Physics and Mechatronic Engineering Guizhou Minzu UniversityGuiyang 550025China School of Chemical Engineering Guizhou Minzu UniversityGuiyang 550025China School of Materials Science and Engineering Guizhou Minzu UniversityGuiyang 550025China Advanced Optics and Photonics Laboratory Department of EngineeringSchool of Science TechnologyNottingham Trent UniversityNottingham NG118NSUK Extreme Optoelectromechanics Laboratory(XXL) School of Physics and Electronic SciencesEast China Normal UniversityShanghai 200241China State Key Laboratory of Precision Spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China School of Engineering and Information Technology University of New South Wales at CanberraCanberra ACT 2610Australia

Bound states in the continuum(BICs)have emerged as an efficient tool for trapping light at the nanoscale,promising several exciting applications in *** the structural symmetry has been proposed as an effective way of exciting quasiBICs(QBICs)and generating high-Q ***,we demonstrate that QBICs can be excited in an all-dielectric metasurface by scaling the lattice of the metasurface,causing translational symmetry *** corresponding BICs arise from band folding from the band edge to the Γ point in the first Brillouin *** analysis reveals that the toroidal dipole dominates these ***,scaling the lattice along different directions provides additional freedom for tailoring QBICs,enabling polarization-dependent or-independent *** addition,this allows the realization of two QBICs at different wavelengths using plane-wave illumination with different polarizations on the *** experimentally demonstrated the existence of these BICs by fabricating silicon metasurfaces with scaled lattices and measuring their transmission *** vanished resonant linewidth identifies BICs in the transmission spectrum,and the QBICs are characterized by highQ Fano resonances with the Q-factor reaching *** results have potential applications in enhancing light-matter interaction,such as laser,nonlinear harmonic generation,and strong coupling.

关键词： lattice perturbation bound state in the continuum dielectric nanostructure

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The Impact of Pulse Current on the Deformation and Damage Behavior of Cu/Al Layered Composites

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SSRN 2024年

作者： Huang, Tao Qiao, Mu Xing, Binghui Yan, Siliang Xiang, Nan Guo, Junqing Huang, Liang School of Materials Science and Engineering Henan University of Science and Technology Luoyang471023 China Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Luoyang471023 China Key Laboratory of Materials Science &Processing Technology for Non-ferrous Metals of Henan Luoyang471023 China School of Materials Science and Engineering Hefei University of Technology Hefei230009 China School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

Electro-assisted forming is a promising approach for improving formability of copper-aluminum (Cu-Al) laminated composites (LCs). It is well known that the interfacial zone is critical to determine the cooperative deformation behavior of composites. However, the precise influence of pulsed current on the Cu-Al LCs interfacial zone has been not unexplored. In this work, the effect of pulsed currents on the interfacial zone is systematically investigated. By designing orthogonal experiments with current parameters of 100Hz/300Hz/500Hz, 100A/300A/500A/700A and characterizing the interfacial region of the specimens with pulse current parameters of 500Hz/100A. The results show that suitable pulse current parameters can enhance the forming properties of the material. The pulsed current heals microcracks in the interfacial zone by means of material replenishment, and hinders crack extension by forming a melt hole and a compressive stress field at the crack tip. © 2024, The Authors. All rights reserved.

关键词： Laminated composites

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Phase Compositions and Crystal Structure of Sn-Deficient Ca2Sn2Al2O9 Microwave Dielectric Ceramics with High Q×F Values

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SSRN 2022年

作者： Du, Kang Yin, Chang-Zhi Zhu, Wei Zhou, Cai Zhang, Bo-Han Wang, Ting-Ting Wang, Sheng-Xiang Lei, Wen School of Mathematical and Physical Sciences Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China of MOE Huazhong University of Science and Technology Wuhan430074 China Wenzhou Advanced Manufacturing Institute Huazhong University of Science and Technology Wenzhou325035 China

The phase compositions and microwave dielectric properties of Sn-deficient Ca2Sn2Al2O9 ceramics in this study were explored via crystal structure refinement, far-infrared reflectance spectral and microwave dielectric tests. The crystal structure of the Ca2Sn2Al2O9 was confirmed via transmission electron microscopy. The CaSnO3 and SnO2 second phases existed at Ca2Sn2-xAl2O9-2x (x = 0) ceramic. Single-phase Ca2Sn2Al2O9 ceramics were obtained at 0.08 ≤ x ≤ 0.1, and the orthorhombic structure with the Pbcn space group of Ca2Sn2Al2O9 was verified. For multi-phase Ca2Sn2-xAl2O9-2x (0 ≤ x ≤ 0.06) ceramics, their microwave dielectric properties were mainly affected by second phase contents, and their Q×f values increased gradually with the rise in x. High Q×f (105,700 GHz at 12.99 GHz) was obtained by the Ca2Sn2-xAl2O9-2x (x = 0.08) ceramic with high intrinsic Q×f (175,000 GHz). The large deviation between measured Q×f values and fitted intrinsic Q×f values could be ascribed to the Sn4+ vacancies of the Sn-deficient Ca2Sn2Al2O9 ceramics. The Ca2Sn2-xAl2O9-2x (0 ≤ x ≤ 0.1) ceramics presented large negative τf values, and this τf was mainly affected by τΕ. Meanwhile, the Ca2Sn2-xAl2O9-2x (x = 0.08) ceramic achieved optimal microwave dielectric properties (Εr = 8.31, Q×f = 105,700 GHz at 12.99 GHz and τf = ‒63.7 ppm/°C), indicating the good feature of this material for millimetre-wave applications. © 2022, The Authors. All rights reserved.

关键词： Aluminum compounds

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In-situ microstructural investigations of the TRIP-to-TWIP evolution in Ti-Mo-Zr alloys as a function of Zr concentration

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Journal of materials Science & technology 2021年第6期65卷 228-237页

作者： Bingnan Qian Jinyong Zhang Yangyang Fu Fan Sun Yuan Wu Jun Cheng Philippe Vermaut Frederic Prima Chimie ParisTech PSL UniversityCNRSInstitut de Recherche de Chimie Paris75005 PahsFrance School of Material Science and Engineering China University of Mining and TechnologyXuzhou Jiangsu 221008China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'anShaanxi 710072China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Northwest Institute for Non-ferrous Metal Research Shaanxi Key Laboratory of Biomedical Metal MaterialsXi'an 710016China Sorbonne Universities UPMC University ParisUFR92675005 ParisFrance

Aiming at overcoming the strength-ductility trade-off in structural Ti-alloys,a new family of TRIP/TWIP Ti-alloys was developed in the past decade(TWIP:twinning-induced plasticity;TRIP:transformationinduced plasticity).Herein,we study the tunable nature of deformation mechanisms with various TWIP and TRIP contributions by fine adjustment of the Zr content on ternary Ti-12 Mo-xZr(x=3,6,10)*** microstructure and deformation mechanisms of the Ti-Mo-Zr alloys are explored by using in-situ electron backscatter diffraction(EBSD)and transmission electron microscopy(TEM).The results show that a transition of the dominant deformation mode occurred,going from TRIP to TWIP major mechanism with increasing Zr *** the Ti-12 Mo-3 Zr alloy,the stress-induced martensitic transformation(SIM)is the major deformation mode which accommodates the plastic *** the Ti-12 Mo-6 Zr alloy,the combined deformation twinning(DT)and SIM modes both contribute to the overall plasticity with enhanced strain-hardening rate and subsequent large uniform *** increase of the Zr content in Ti-12 Mo-10 Zr alloy leads to an improved yield stress involving single DT mode as a dominant deformation mechanism throughout the plastic *** the present work,a set of comprehensive in-situ and ex-situ microstructural investigations clarify the evolution of deformation microstructures during tensile loading and unloading processes.

关键词： Metastable beta(β)Ti-alloys TRIP/TWIP effects Deformation mechanisms In-situ traction-EBSD TEM observation

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Rapid synthesis of Pd single‐atom/cluster as highly active catalysts for Suzuki coupling reactions

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Chinese Journal of Catalysis 2022年第4期43卷 1058-1065页

作者： Hehe Wei Xiaoyang Li Bohan Deng Jialiang Lang Ya Huang Xingyu Hua Yida Qiao Binghui Ge Jun Ge Hui Wu State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Lab for Industrial Biocatalysis Ministry of EducationDepartment of Chemical EngineeringTsinghua UniversityBeijing 100084China Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601AnhuiChina Key Laboratory for Advanced Materials Center for Computational Chemistry and Research Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai 200237China

Palladium(Pd)‐based catalysts are essential to drive high‐performance Suzuki coupling reactions,which are powerful tools for the synthesis of functional organic ***,we developed a solution‐rapid‐annealing process to stabilize nitrogen‐mesoporous carbon supported Pd single‐atom/cluster(Pd/NMC)material,which provided a catalyst with superior performance for Suzuki coupling *** comparison with commercial palladium/carbon(Pd/C)catalysts,the Pd/NMC catalyst exhibited significantly boosted activity(100%selectivity and 95%yield)and excellent stability(almost no decay in activity after 10 reuse cycles)for the Suzuki coupling reactions of chlorobenzenes,together with superior yield and excellent selectivity in the fields of the board scope of the ***,our newly developed rapid annealing process of precursor solutions is applied as a generalized method to stabilize metal clusters(***,Pt,Ru),opening new possibilities in the construction of efficient highly dispersed metal atom and sub‐nanometer cluster catalysts with high performance.

关键词： Pd single‐atom/cluster catalyst Suzuki coupling reactions Solution rapid annealing Energy barrier High yield

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