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Nano Research 2025年第1期18卷 10-20页

作者： Zongsheng Chen Yahui Wang Yi Liu Zhigang Li Xiangyin Lv Liping Liu Yajing Chang Jiaming Shi Xiao Zhang State key laboratory of Pulsed Power Laser technology School of Electronic EngineeringNational University of Defense TechnologyHefei 230037China Anhui provincial laboratory of Advanced Laser technology School of Electronic EngineeringNational University of Defense TechnologyHefei 230037China Centre for Environmental and Energy nanomaterials Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Centre for Excellence in NanoscienceInstitute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

Hierarchical hollow structure has demonstrated potential for enhancing electromagnetic(EM)attenuation and improving impedance matching,garnering significant attention for ***,we have successfully implemented compositional and structural engineering to fabricate hollow Mo2C/C microspheres with controllable composition by coupling interaction between dopamine hydrochloride and ammonium *** the synergistic effect of composition and hollow structure,the strongest reflection loss intensity and broadest effective absorption of the optimized sample reach-70.2 dB and 6.2 GHz,*** formation of hollow heterogeneous structures not only favors impedance matching feature,but also generates considerable contribution to EM attenuation ***,radar cross-section simulation data indicate that hollow Mo2C/C microspheres with compositional optimization and heterogeneous structures have broad prospects for practical applications.

关键词： electromagnetic absorption Mo2C/C microwave absorption hollow structure

Long cycle performance of NC@VN/MnO cathode for AZIBs based on Mn/V relay type collaboration

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Journal of Energy Chemistry 2023年第8期83卷 106-118,I0005页

作者： Tingting Li Ruisong Guo Yang Li Leichao Meng Xiaohong Sun Fuyun Li Xinqi Zhao Zhongkai Xu Jianhong Peng Lingyun An key laboratory of Advanced Ceramics and Machining technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China College of Petrochemical technology Lanzhou University of TechnologyLanzhou 730050GansuChina qinghai provincial key laboratory of nanomaterials and technology School of Physics and Electronic Information EngineeringQinghai Minzu UniversityXining 810007QinghaiChina

Aqueous zinc ion batteries(AZIBs) have received great attention because of their non-toxicity,high safety,low cost,high abundance,and high specific ***,their specific capacity is still low compared with lithium ion battery,and current academic research interesting has been focused on developing new cathode materials with high specific *** this study,a Mn/V hybrid polymer framework is designed by a simple self-polymerization *** subsequent calcination,ultrafine VN quantum dots and MnO nanoparticles are generated in situ and stably encapsulated inside N-doped carbon(NC) shells to obtain a novel hybrid cathode NC@VN/MnO for *** to the density functional theory(DFT) calculation,the hybrids of MnO and VN can generate both interfacial effects and built-in electric fields that significantly accelerate ion and electron transport by tuning the intrinsic electronic structure,thus enhancing electrochemical performance.A synergistic strategy of composition and structural design allows the rechargeable AZIBs to achieve low-cost and excellent long-cycle performance based on a relay type collaboration at different cycling ***,the NC@VN/MnO cathode has output a capacity of 108.3 mA h g^(-1)after 12,000 cycles at 10 A g^(-1).These results clearly and fully demonstrate the advantages of the hybrid cathode NC@VN/MnO.

关键词： VN quantum dots Mno N-doped carbon Heterojunction Long-cycle performance

Long-term Properties of Aeolian Sand-magnesium Oxychloride Cement Composites and Its Engineering Application

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Journal of Wuhan University of technology(Materials Science) 2023年第4期38卷 842-848页

作者：常成功 DONG Jinmei ZHENG Weixin WEN Jing 阎峰云肖学英 AN Lingyun State key laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou730050China key laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakeChinese Academy of SciencesXining810008China key laboratory of Salt Lake Resources Chemistry of qinghai Province Xining810008China qinghai provincial key laboratory of nanomaterials and technology College of Physics and Electronic Information EngineeringQinghai Minzu UniversityXining810007China

In order to prepare a new material with long-term stable performance,low cost,easy construction,and ecological environmental protection,the influence of aeolian sand on the compressive and flexural strength as well as micro morphology and phase composition of magnesium oxychloride cement(MOC)was *** experimental results indicate that,with the increase of content of doping sand,the compressive strength and flexural strength of MOC decrease ***,when the quality ratio of aeolian sand and light burned magnesia powder is 1:8,the performance meets the actual engineering ***,the compressive strength of MOC is not less than 18 MPa,and flexural strength is not less than 4 ***,within 12 months of age,the compressive strength and flexural strength are *** is no obvious change in phase composition,and its main phase is still 5·1·8 *** appearance changes from needle-like to gel-like *** on engineering applications,it is found that when the novel sand-fixing material is used in the field for one year,its macroscopic feature is not damaged,compressive strength and flexural strength are also more stable,phase composition negligibly changes,and micro morphology has also been turned into be gellike *** further confirm the long-term stability and weather resistance of MOC doping aeolian sand,providing theoretical and technical support for the widely application of MOC in the field of sand fixation in the future.

关键词： magnesium oxychloride cement aeolian sand mechanical properties micro morphology phase composition

Simultaneous realization of high sulfur utilization and lithium dendrite-free via dual-effect kinetic regulation strategy toward lithium-sulfur batteries

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Journal of Energy Chemistry 2023年第6期81卷 260-271,I0007页

作者： Xinqi Zhao Xiaohong Sun Ruisong Guo Song Wang Fuyun Li Tingting Li Wen Zhang Chunming Zheng Lingyun An Leichao Meng Xudong Hu key laboratory of Advanced Ceramics and Machining technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China qinghai provincial key laboratory of nanomaterials and technology School of Physics and Electronic Information EngineeringQinghai Minzu UniversityXining 810007QinghaiChina Department of Chemistry&Biochemistry University of CaliforniaSanta BarbaraCA 93106United States

With the high theoretical specific capacity and energy density,lithium-sulfur batteries(LSBs)have been intensively studied as promising candidates for energy storage ***,LSBs are largely hindered by inferior sulfur utilization and uncontrollable dendritic ***,a hierarchical functionalization strategy of stepwise catalytic-adsorption-conversion for sulfur species via the synergetic of the efficiently catalytic host cathode and light multifunctional interlayer has been proposed to concurrently address the issues arising on the dual sides of the *** multi-layer SnS_(2) micro-flowers embedded into the natural three-dimensional(3D)interconnected carbonized bacterial cellulose(CBC)nanofibers are fabricated as the sulfur host that provides numerous catalytic sites for the rapid catalytic conversion of sulfur ***,the distinctive CBC-based SnO_(2)-SnS_(2) heterostructure network accompanied high conductive carbon nanofibers as the multifunctional interlayer promotes the rapid anchoringdiffusion-conversion of lithium polysulfides,Li^(+)flux redistribution,and uniform Li *** equipped with our strategy exhibit a high reversible capacity of 1361.5 m A h g^(-1)at 0.2 C and superior cycling stability with an ultra-low capacity fading of 0.031%per cycle in 1000 cycles at 1.5 C and 0.046%at 3 C.A favorable specific capacity of 859.5 m A h g^(-1)at 0.3 C is achieved with a high sulfur mass loading of 5.2 mg cm^(-2),highlighting the potential of practical *** rational design in this work can provide a feasible solution for high-performance LSBs and promote the development of advanced energy storage devices.

关键词： Lithium-sulfur battery Catalytic sulfur host Multifunctional interlayer Polysulfides adsorbing-conversion Dendrite-free

Investigation of Portevin–Le Chatelier effect in rolled α-phase Mg-Li alloy during tensile and compressive deformation

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Journal of Materials Science & technology 2020年第17期52卷 152-161页

作者： Xiaoqiang Li Chunlong Cheng Qichi Le Lei Bao Peipeng Jin Ping Wang Liang Ren Hang Wang Xiong Zhou Chenglu Hu key laboratory of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang110819China qinghai provincial key laboratory of New Light Alloys Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and FormingQinghai UniversityXining810016China

Avoiding the Portevin-Le Chatelier(PLC)effect is very important concern for wrought Mg-Li *** this study,the special PLC effect was found in rolled Mg-5Li-3Al-2Zn(LAZ532)alloy during tensile and compressive *** observing microstructure evolution of the alloy during tensile and compressive deformation,it was found that prismaticand pyramidalslips were activated during tensile deformation,resulting in plenty of dislocation *** the deformation process after compressive yielding,the deformations in coarse grains and fine grains were dominated by{1012}extension twinning and grain boundary slip,*** on experimental result analysis,the sudden appearance of PLC effect in the later stage of axial tensile deformation(along rolled direction)was caused by interaction between solute atoms and *** the process of axial compressive deformation(along rolled direction),PLC effect presented the complex and changeable phenomenon of appeared-disappeared-appeared,which was mainly caused by the continuous nucleation of twin in the material,the activation of grain boundary slip and the shear deformation of twin,respectively.

关键词： Mg-Li alloy Portevin-Le Chatelier effect Dynamic strain aging Twins

High-Temperature Stability of Mg-1Al-12Y Alloy Containing LPSO Phase and Mechanism of Its Portevin-Le Chatelier(PLC)Effect

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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 982-998页

作者： Qian-Long Ren Shuai Yuan Shi-Yu Luan Jin-Hui Wang Xiao-Wei Li Xiao-Yu Liu qinghai provincial key laboratory of New Light Alloys Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and FormingQinghai UniversityXining810016China School of Materials Science and Engineering Shenyang University of TechnologyShenyang110870China

In this study,the high-temperature stability and the generation mechanism of the Portevin-Le Chatelier(PLC)effect in solid-solution Mg-1Al-12Y alloy with different heat treatment processes were investigated by adjusting the content of long-period stacking ordered(LPSO)*** was found that the content of LPSO phases in the alloys differed the most after heat treatment at 530℃for 16 h and 24 h,with values of 13.56%and 3.93%***,high-temperature tensile experiments were conducted on these two alloys at temperatures of 150℃,200℃,250℃,and 300℃.The results showed that both alloys exhibited the PLC effect at temperatures ranging from 150 to 250℃.However,at a temperature 300℃,only the alloy with a greater concentration of LPSO phases exhibited the PLC effect,whereas the alloy with a lower proportion of LPSO phases did not exhibit this ***,both alloys exhibited remarkable high-temperature stability,with the alloy containing a greater percentage of LPSO phases also demonstrating superior *** underlying mechanism for this phenomenon lies in the exceptional high-temperature stability exhibited by the second phase within the ***,the LPSO phase effectively obstructs the movement of dislocations,and it also undergoing kinking to facilitate plastic deformation of the *** results indicate that the PLC effect can be suppressed by reducing dislocation pile-up at grain boundaries,which leads to a decrease in alloy plasticity but an increase in *** presence of the PLC effect in the WA121 alloy is attributed to the abundant dispersed second phase within the alloy,which initially hinders the movement of dislocations,leading to an increase in stress,and subsequently releases the dislocations,allowing them to continue their movement and thereby reducing in stress.

关键词： Magnesium alloy Long-period stacking ordered(LPSO)phase Portevin-Le Chatelier effect High temperature

Effect of long-period ordered stacking on twinning behavior and mechanical properties of Mg-Al-Y alloy during uniaxial hot compression

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Journal of Materials Science & technology 2023年第11期142卷 152-166页

作者： Shuai Yuan Jinhui Wang Lei Zhang Shiyu Luan Peipeng Jin qinghai provincial key laboratory of New Light Alloys Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and FormingQinghai UniversityXining 810016China School of Material Science and Engineering Shenyang University of TechnologyShenyang 110870China

Two alloys with(T4-4h)and without(T4-8h)long-period stacking ordered(LPSO)phase were obtained by solution treatment of as-cast Mg-1Al-12Y alloy at 540℃ for 4 h and 8 h,*** compressive tests(300-450℃,ε=0.01s^(-1))showed that the strengthening effect of LPSO in T4-4h alloy gradually disappeared with temperature *** addition,the corresponding compression deformation behavior of the two alloys was also investigated by electron backscatter diffraction(EBSD).It was found that the twinning of the two alloys was dominated by{1012}extension twins,and the large amount of lamellar LPSO in T4-4 h alloy inhibited the activation and growth of ***[0001]//compression direction(CD)texture formed after deformation is mostly attributed to the activation and growth of extension *** analyzing the activated twin variants,it was found that the activation of twin variants mainly depended on Schmid factor(SF).For twin variants with smaller SF,they may be activated due to local stress *** on the analysis results of in-grain misorientation axis(IGMA)and SF,the deformation mechanism of the alloys at elevated temperature is dominated by basal slip and non-basal *** stronger mechanical properties of T4-4h alloy than those of T4-8h are attributed to the obstruction of non-basal slip movement by LPSO.

关键词： LPSO strengthening Hot deformation Twinning behavior

Multicomponent transition metal phosphide for oxygen evolution

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International Journal of Minerals,Metallurgy and Materials 2022年第3期29卷 503-512页

作者： Lihua Liu Ning Li Jingrui Han Kaili Yao Hongyan Liang College of Innovation and Entrepreneurship Shanghai Jianqiao UniversityShanghai 201306China School of Materials Science and Engineering Tianjin UniversityTianjin 300350China qinghai provincial key laboratory of nanomaterials and Nanotechnology Qinghai Minzu UniversityQinghai 810007China key laboratory of Efficient Utilization of Low and Medium Grade Energy Ministry of EducationTianjin UniversityTianjin 300350China

Transition metal phosphides(TMPs)have exhibited decent performance in an oxygen evolution reaction(OER),which is a kinetic bottleneck in many energy storages and conversion *** reported catalysts are composed of three or fewer metallic *** inherent complexity of multicomponent TMPs with more than four metallic components hinders their investigation in rationally designing the structure and,more importantly,comprehending the component-activity *** hydrothermal growth and subsequent phosphor-ization,we reported a facile strategy for combining TMPs with tunable elemental compositions(Ni,Fe,Mn,Co,Cu)on a two-dimensional ti-tanium carbide(MXene)*** obtained TMPs/MXene hybrid nanostructures demonstrate homogeneously distributed *** ex-hibit high electrical conductivity and strong interfacial interaction,resulting in an accelerated reaction kinetics and long-term *** res-ults of different component catalysts’OER performance show that NiFeMnCoP/MXene is the most active catalyst,with a low overpotential of 240 mV at 10 mA·cm−2,a small Tafel slope of 41.43 mV·dec−1,and a robust long-term electrochemical *** to the electrocata-lytic mechanism investigation,the enhanced NiFeMnCoP/MXene OER performance is due to the strong synergistic effect of the multi-ele-mental *** work,therefore,provides a scalable synthesis route for multi-elemental TMPs and a valuable guideline for efficient MXene-supported catalysts design.

关键词： multicomponent transition metal phosphides electrocatalytic oxygen evolution reaction MXene synergistic effect

Enhanced mechanical properties of Mg-1Al-12Y alloy containing long period stacking ordered phase

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Journal of Magnesium and Alloys 2023年第12期11卷 4679-4688页

作者： Shuai Yuan Jinhui Wang Xiaoqiang Li Hongbin Ma Lei Zhang Peipeng Jin qinghai provincial key laboratory of New Light Alloys Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and FormingQinghai University251 ningda roadChengbei District.Xining 810016China key laboratory of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China

In this study, a systematic investigation on the effect of solution treatment time(2–8 h) at 540℃ on the microstructure and mechanical properties in as-cast Mg-1Al-12Y(AY112, wt.%) alloy was performed. The results showed that the solution treatment did not cause the growth of grains and the change of texture;however, the mechanical properties had been significantly improved, which was mainly attributed to the precipitation of 18R long period ordered stacking(LPSO) phase in the solution-treated alloys. In addition, the dissolution of β-Mg_(24)Y_(5)phase and the diffusion of solute atoms during the solution treatment were both beneficial to the mechanical properties. When the as-cast alloy was solution-treated at 540℃ for 4 h(T4-4h alloy), the mechanical properties of the alloy are optimal. Compared with the as-cast alloy,the ultimate tensile strength(UTS) and elongation of the T4-4h alloy are increased by ~23% and ~179%, respectively. The deformation of the T4-4h alloys was dominated by a combination of basal slip and non-basal slip, and the presence of the LPSO phase effectively inhibited the nucleation of extension twin. Besides, the LPSO phase can also hinder the activation of basal dislocations and the movement of non-basal dislocations. Therefore, the LPSO phase simultaneously improves the strength and plasticity of the alloy.

关键词： Solution treatment LPSO phase Mechanical properties Deformation mechanism

Fungal spore record of pastoralism on the NE qinghai-Tibetan Plateau since the middle Holocene

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Science China Earth Sciences 2021年第8期64卷 1318-1331页

作者： Haicheng WEI Chongyi E Ronglei DUAN Jing ZHANG Yongjuan SUN Guangliang HOU Jingyi GAO key laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China qinghai provincial key laboratory of Geology and Environment of Salt Lakes Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China qinghai provincial key laboratory of Physical Geography and Environmental Processes School of Geographic ScienceQinghai Normal UniversityXining 810008China Academy of Plateau Science and Sustainability Qinghai Normal UniversityXining 810008China

Pastoralism is considered a crucial factor in the eventual year-round occupation of high-altitude regions(>3000 m asl)of the qinghai-Tibetan Plateau,and the northeastern qinghai-Tibetan Plateau(NE-QTP)was an important corridor for early human *** analyzed fossil fungal spore records for the last 8500 years from a high resolution aeolian section at Langgeri(LGR)on the ***-two fungal spore types were identified in the LGR section,including seven coprophilous *** combined analysis of coprophilous fungal spores,Cyperaceae,Artemisia,and Hippophae pollen,and the charcoal>50µm fraction to explore the timing and controls of pastoralism on the NE-QTP since the middle *** commenced at LGR shortly before ca.5.5 ka and gradually increased between ca.5.5–3.5 ka,but markedly intensified after ca.2.2 ka,with three periods of growth at ca.2.1–1.9,1.4–1.2,and 0.6–0 ka,and a decline at ca.1.1–0.6 *** timing of changes in pastoral activity on the NE-QTP based on the coprophilous fungal spore record is supported by regional archeology and historical *** and political developments,rather than climate change,played key roles in the long-term fluctuations of regional pastoralism on the NE-QTP in the late Holocene.

关键词： Coprophilous fungal spores Pastoralism qinghai Lake basin Holocene qinghai-Tibetan Plateau