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A mild, configurable, flexible CoNi-LDH（v）/Zn battery based on H-vacancy-induced reversible Zn2+ intercalation

Journal of Energy Chemistry 2025年第1期100卷 498-508页

作者： Xinyue Cheng Dingsheng Wu Hao Gao Qingqing Wang Pengfei Lv Sam S.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University School of Mechanical Engineering Korea University

Flexible Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flexible aqueous Zn-based batteries based on Co-Ni layered double hydroxide （CoNi-LDH） as the cathode material is hampered by their poor cycling stability and the corrosiveness of alkaline ***,CoNi-LDH nanosheets enriched with H vacancies (CoNi-LDH（v）) were constructed on a flexible carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDH（v）@CC as the cathode exhibited highly reversible conversion reactions and stable operation in 3 M ZnSO4electrolyte （pH=4）.The battery delivered an excellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant H vacancies served as active sites for the reversible intercalation of Zn2+and the extravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an excellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDH（v）@CC//Zn@CC battery was fabricated and was found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flexible battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** proposed engineering strategy contributes to the realization of textiles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery H vacancies Mild aqueous electrolyte Tailorable battery Wearable energy storage device

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Dual Additives for Stabilizing Li Deposition and SEI Formation in Anode-Free Li-Metal Batteries

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Energy & Environmental Materials 2024年第3期7卷 84-92页

作者： Baolin Wu Chunguang Chen Dmitri L.Danilov Zhiqiang Chen Ming Jiang Rüdiger-A.Eichel Peter H.L.Notten Forschungszentrum Jülich(IEK-9) D-52425Jülich Germany RWTH Aachen University D-52074Aachen Germany LNM Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Sciences University of Chinese Academy of SciencesBeijing 100049China Eindhoven University of Technology P.O.Box 5135600 MBEindhoven The Netherlands School of Electronics and Information Institute of Carbon Neutrality and New EnergyHangzhou Dianzi UniversityHangzhou 310018China University of Technology Sydney BroadwaySydney NSW 2007Australia

Anode-free Li-metal batteries are of significant interest to energy storage industries due to their intrinsically high ***,the accumulative Li dendrites and dead Li continuously consume active Li during *** results in a short lifetime and low Coulombic efficiency of anode-free Li-metal *** effective electrolyte additives can improve the Li deposition homogeneity and solid electrolyte interphase(SEI)stability for anode-free Li-metal ***,we reveal that introducing dual additives,composed of LiAsF6 and fluoroethylene carbonate,into a low-cost commercial carbonate electrolyte will boost the cycle life and average Coulombic efficiency of NMC‖Cu anode-free Li-metal *** NMC‖Cu anode-free Li-metal batteries with the dual additives exhibit a capacity retention of about 75%after 50 cycles,much higher than those with bare electrolytes(35%).The average Coulombic efficiency of the NMC‖Cu anode-free Li-metal batteries with additives can maintain 98.3%over 100 *** contrast,the average Coulombic efficiency without additives rapidly decline to 97%after only 50 *** situ Raman measurements reveal that the prepared dual additives facilitate denser and smoother Li morphology during Li *** dual additives significantly suppress the Li dendrite growth,enabling stable SEI formation on anode and cathode *** results provide a broad view of developing low-cost and high-effective functional electrolytes for high-energy and long-life anode-free Li-metal batteries.

关键词： anode-free lithium metal battery dual additives in situ Raman Li growth SEI formation

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Investigation on the freeze-thaw damage to the jointed plain concrete pavement under different climate conditions

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Frontiers of Structural and Civil Engineering 2018年第2期12卷 227-238页

作者： Shuaicheng GUO Qingli DAI Jacob HILLER Department of Civil and Environmental Engineering Michigan Technological University 1400 Townsend Drive Houghton MI49931-1295 USA

Freeze-thaw damage is one of the main threats to the long time performance of the concrete pavement in the cold regions. This project aims to evaluate the influence of the freeze-thaw damages on pavement distresses under different climate conditions. Based on the Long-Term Pavement Performance （LTPP） data base, the freeze-thaw damage generated by four different kinds of climate conditions are considered in this project： wet-freeze, wet-non freeze, dry- freeze and dry-non freeze. The amount of the transverse crack and the joint spalling, along with the International Roughness Index （IR/） are compared among the test sections located in these four different climate conditions. The back calculation with the Falling Weight Deflectometer （FWD） test results based on the ERES and the Estimation of Concrete Pavement Parameters （ECOPP） methods are conducted to obtain concrete slab elastic modulus and the subgrade k-value. These two parameters both decrease with service time under freeze condition. Finally, MEPDG simulation is conducted to simulate the IR/development with service year. These results showed the reasonable freeze-thaw damage development with pavement service life and under different climate conditions.

关键词： LTPP elastic modulus k-value IRI MEPDG

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A simulation study of airborne wear particles from laboratory wheel-rail contacts

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Particuology 2016年第5期14卷 31-42页

作者： Hailong Liu Lage Tord Ingemar Jonsson Par Goran Jonsson KTH-Royal Institute of Technology Division of Applied Process Metallurgy Department of Materials Science and Engineering SE-100 44 StockholmSweden FOI SWedish Defence Research Agency Division of CBRN De fence and Security 5E-901 82 Umed Sweden

Laboratory measurements of airborne particles from sliding contacts are often performed using a tri- bometer located in a ventilation chamber. Although knowledge of particle transport behavior inside the chamber is required because it can influence the analysis of measurements, this knowledge is lacking. A numerical model was built based on the same geometry as a pin-on-disc measurement system to explain particle transport behavior inside the chamber and to determine the deviation between real amounts of generated and measured particles at the outlet. The effect of controlled flow conditions on the airflow pattern and particle transport inside the chamber was studied for different experimental conditions. Cal- culations show that a complex airflow pattern is formed by the spinning disc, and that it differs for each rotational speed. Simulation results reveal that particle transport in the chamber is governed mainly by the airflow pattern. The deposition velocity in the chamber was estimated and the possibility that part of the generated particles would remain in the chamber was studied. This led to an approximate estima- tion of particle loss rate. A comparison between experimental and simulated results with respect to the particle mass flow rate close to the outlet yields a reference factor of 0.7, which provides an indication of the difference between measured and real values.

关键词： Airborne particles Particle transport Concentration Particle loss rate Deposition velocity

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A segmented conical electric lens for optimization of the beam spot of the low-energy muon facility at PSI: a Geant4 simulation analysis

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Nuclear Science and Techniques 2017年第3期28卷 13-22页

作者： Ran Xiao Elvezio Morenzoni Zaher Salman Bang-Jiao Ye Thomas Prokscha State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China Laboratory for Muon Spin Spectroscopy Paul Scherrer Institut (PSI) 5232 Villigen Switzerland

The low-energy muon facility at PSI provides nearly fully polarized positive muons with tunable energies in the ke V range to carry out muon spin rotation(LE-μSR)experiments with nanometer depth resolution on thin films,heterostructures, and near-surface regions. The low-energy muon beam is focused and transported to the sample by electrostatic lenses. In order to achieve a minimum beam spot size at the sample position and to enable the steering of the beam in the horizontal and vertical direction, a special electrostatic device has been implemented close to the sample position. It consists of a cylinder at ground potential followed by four conically shaped electrodes,which can be operated at different electric potential. In LE-μSR experiments, an electric field at the sample along the beam direction can be applied to accelerate/decelerate muons to different energies(0.5–30 keV). Additionally, a horizontal or vertical magnetic field can be superimposed for transverse or longitudinal field μSR experiments. The focusing properties of the conical lens in the presence of these additional electric and magnetic fields have been investigated and optimized by Geant4 simulations. Some experimental tests were also performed and show that the simulation well describes the experimental setup.

关键词： Muon beam Muon spin rotation Low-energy muon Beam size Geant4

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Upgrading and dephosphorization of Western Australian iron ore using reduction roasting by adding sodium carbonate

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International Journal of Minerals,Metallurgy and Materials 2013年第6期20卷 505-513页

作者： De-qing Zhu Tie-jun Chun Jian Pan Li-ming Lu Zhen He School of Minerals Processing and Bioengineering Central South University Commonwealth Scientific and Industrial Research Organisation (CSIRO)

The technology of direct reduction by adding sodium carbonate （Na2CO3） and magnetic separation was developed to treat Western Australian high phosphorus iron ore. The iron ore and reduced product were investigated by optical microscopy and scanning electron microscopy. It is found that phosphorus exists within limonite in the form of solid solution, which cannot be removed through traditional ways. During reduction roasting, Na2CO3 reacts with gangue minerals （SiO2 and A1203）, forming aluminum silicate-containing phosphorus and damaging the ore structure, which promotes the separation between iron and phosphorus during magnetic separation. Meanwhile, Na2CO3 also improves the growth of iron grains, increasing the iron grade and iron recovery. The iron concentrate, assaying 94.12wt% Fe and 0.07wt% P at the iron recovery of 96.83% and the dephosphorization rate of 74.08%, is obtained under the optimum conditions. The final product （metal iron powder） after briquetting can be used as the burden for steelmaking by an alactrie *** furnace to rer）la,ce scrar） steel.

关键词： iron ore reduction sodium carbonate ore roasting magnetic separation phosphorus removal

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In-situ formation of Ti-Mo biomaterials by selective laser melting of Ti/Mo and Ti/Mo_(2)C powder mixtures:A comparative study on microstructure,mechanical and wear performance,and thermal mechanisms

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Journal of Materials Science & Technology 2022年第20期115卷 81-96页

作者： Qimin Shi Shoufeng Yang Yi Sun Yifei Gu Ben Mercelis Shengping Zhong Bart Van Meerbeek Constantinus Politis KU Leuven Department of Biomedical SciencesOMFS-IMPATH Research Group&UZ Leuven(University Hospitals Leuven)Oral and Maxillofacial SurgeryKapucijnenvoer 33Leuven 3000Belgium University of Southampton Faculty of Engineering and Physical SciencesSouthampton SO171BJUnited Kingdom KU Leuven Department of Oral Health SciencesBIOMAT-Biomaterials Research Group&UZ Leuven(University Hospitals Leuven)DentistryKapucijnenvoer 7Leuven 3000Belgium

Ti-Mo alloys/composites are expected to be the next-generation implant material with low moduli but without toxic/allergic ***,synthesis mechanisms of the Ti-Mo biomaterials in Selective Laser Melting(SLM)vary according to raw materials and fundamentally influence material performance,due to inhomogeneous chemical compositions and ***,this work provides a comparative study on microstructure,mechanical and wear performance,and underlying thermal mechanisms of two promising Ti-Mo biomaterials prepared by SLM but through different synthesis mechanisms to offer scientific understanding for creation of ideal metal *** are(i)Ti-7.5 Mo alloys,prepared from a conventional Ti/Mo powder mixture,and(ii)Ti-7.5 Mo-2.4 Ti C composites,in-situ prepared from Ti/Mo_(2)C powder *** reveal that the in-situ Ti-7.5 Mo-2.4 Ti C composites made from Ti/Mo_(2)C powder mixture by SLM can produce 61.4%moreβphase and extra Ti C precipitates(diameter below 229.6 nm)than the Ti-7.5 Mo *** fine Ti C not only contributes to thinner and shorterβcolumnar grains under a large temperature gradient of 51.2 K/μm but also benefits material *** in-situ Ti-7.5 Mo-2.4 Ti C composites produce higher yield strength(980.1±29.8 MPa)and ultimate compressive strength(1561.4±39 MPa)than the Ti-7.5 Mo alloys,increasing by up to 12.1%.However,the fine Ti C with an aspect ratio of 2.71 dominates an unfavourable rise of elastic modulus to 91.9±2 GPa,44.7%higher than the Ti-7.5 Mo alloys,which,nevertheless,is still lower than the modulus of traditional Ti-6 Al-4 ***,Ti C and its homogeneous distribution benefit wear resistance,decreasing the wear rate of the in-situ Ti-7.5 Mo-2.4 Ti C composites to 6.98×10^(-4)mm^3 N^(-1)m^(-1),which is 36%lower than that of the Ti-7.5 Mo ***,although with higher modulus than the Ti-7.5 Mo alloys,the SLM-fabricated in-situ Ti-7.5 Mo-2.4 Ti C composites can expect to provide good biomedical applicati

关键词： Selective laser melting(SLM) Titanium Metal matrix composites Microstructures Mechanical properties Wear properties

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A modified theta projection model for creep behavior of RPV steel 16MND5

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Journal of Materials Science & Technology 2020年第12期47卷 231-242页

作者： Peng Yu Weimin Ma Division of Nuclear Power Safety Royal Institute of Technology(KTH)Stockholm 10691Sweden

During a hypothetical severe accident of light water reactors,the reactor pressure vessel(RPV) could fail due to its creep under the influence of high-temperature ***,modelling of creep behavior of the RPV is paramount to reactor safety analysis since it predicts the transition point of accident progression from in-vessel to ex-vessel *** the present study we proposed a new creep model for the classical French RPV steel 16 MND5,which is adapted from the "theta-projection model" and contains all three stages of a creep *** curves are expressed as a function of time with five model parameters θ_i(i=1-4 and m).A model parameter dataset was constructed by fitting experimental creep curves into this *** correlate the creep curves for different temperatures and stress loads,we directly interpolate the model’s parameters θ_i(i=1-4 and m) from this dataset,in contrast to the conventional "theta-projection model" which employs an extra single correlation for each θ_i(i=1-4 andm),to better accommodate all experimental curves over the wide ranges of temperature and stress *** also put a constraint on the trend of the creep strain that it would monotonically increase with temperature and stress load.A good agreement was achieved between each experimental creep curve and corresponding model’s *** widely used time-hardening and strain-hardening models were performing reasonably well in the new method.

关键词： 16MND5 steel Creep modelling Tertiary stage Reactor pressure vessel Theta projection model

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On the friction effects on rigid-body penetration in concrete and aluminium-alloy targets

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Defence Technology（防务技术） 2019年第4期15卷 576-581页

作者： C.G. Chai A.G. Pi Q.M. Li F.L. Huang Institute of Chemical Materials China Academy of Engineering Physics Mianyang Sichuan 621900 China State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China School of Mechanical Aerospace and Civil Engineering University of Manchester Manchester M13 9PL UK

The friction on the projectile shank is usually excluded in the penetration analysis due to the difficulties to measure the pressure and frictional *** this article,the frictional force on projectile shank is discussed indirectly through the comparison between experimental data and empirical/analytical formulas of the penetration depth for both concrete and aluminium-alloy *** is found that the effect of the frictional force along the projectile shank can be further discussed by the afore comparison and discussion and cannot be ignored because of the relatively large effecting area,especially for deep penetration of concrete and aluminium-alloy targets,where the friction will account for more proportion of penetration resistance.

关键词： Penetration Friction Concrete Aluminium

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Vertically-aligned nanostructures for electrochemical energy storage

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Nano Research 2019年第9期12卷 2002-2017页

作者： Xue Wang Tianyang Wang James Borovilas Xiaodong He Shanyi Du Yuan Yang Center for Composite Material and Structure School of AstronauticsHarbin Institute of TechnologyHarbin 150001China Department of Applied Physics and Applied Mathematics Columbia UniversityNew YorkNY 10025USA

Energy storage devices with high energy and power densities are highly attractive for various applications ranging from portable electronics to electric vehicles and grid-level energy storage,such as rechargeable batteries and *** limiting factor in power density *** ion transport in electrolyte,particularly in tortuous electrode materials with low porosity.A viable approach to enhance ion transport in electrolyte is to create vertically aligned structures and thus reduce electrode *** the past decades,various methods have been explored to develop vertically aligned *** review summarizes battery kinetics to illustrate the importance of low tortuosity in electrodes,and then introduces various methods to create vertically aligned nanostructures,such as direct growth,templating and *** electrochemical performance of electrodes or electrolytes created by each method is *** the end,this paper discusses challenges with these structures and the directions these technologies can be taken in the future.

关键词： energy storage lithium-i on batteries supercapacitors tortuosity nano structures vertical alignment

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