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Editorial for advanced energy storage and conversion materials and technologies

Rare Metals 2021年第2期40卷 246-248页

作者： Jian-Min Ma Yu-Tao Li School of Physics and Electronics Hunan UniversityChangsha410082China Materials Science and Engineering Program and Texas Materials Institute The University of Texas at AustinAustinTX78712USA

With the rising demand for fast-charging technology in electric vehicles and portable devices,significant efforts have been devoted to the development of energy storage and conversion ***,remarkable progress has been made in the field of various energy storage and conversion devices,i.e.,lithium-ion batteries(LIBs),lithium-metal batteries(LMBs),lithium-sulfur batteries(LSBs),sodium-ion batteries(SIBs),sodium-metal batteries(SMBs),magnesium-ion batteries(MIBs),zinc-ion batteries(ZIBs),electrochemical capacitors(ECs),the corresponding electrode materials have always been the focus and difficulty to further improve the electrochemical performance of the devices.

关键词： lithium energy magnesium

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Periodic micromagnetic finite element method

arXiv

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arXiv 2024年

作者： Ai, Fangzhou Duan, Jiawei Lomakin, Vitaliy Program in Materials Science and Engineering University of California La Jolla San Diego92093 United States

Periodic micromagnetic finite element method (PM-FEM) is introduced to solve periodic unit cell problems using the Landau-Lifshitz-Gilbert equation. PM-FEM is applicable to general problems with 1D, 2D, and 3D periodicities. PM-FEM is based on a non-periodic FEM-based micromagnetic solver and extends it in several aspects to account for periodicities, including the computation of exchange and magnetostatic fields. For the exchange field, PM-FEM modifies the sparse matrix construction for computing the Laplace operator to include additional elements arising due to the periodicities. For the magnetostatic field, the periodic extensions include modifications in the local operators, such as gradient, divergence, and surface magnetic charges as well as the long-range superposition operator for computing the periodic scalar potential. The local operators are extended to account for the periodicities similar to handling the Laplace operator. For the long-range superposition operator, PM-FEM utilizes a periodic Green’s function (PGF) and fast spatial convolutions. The PGF is computed rapidly via exponentially rapidly convergent sums. The spatial convolutions are accomplished via a modified fast Fourier transform based adaptive integral method that allows calculating spatial convolutions with non-uniform meshes in O(N log N) numerical operations. PM-FEM is implemented on CPU and GPU based computer architectures. PM-FEM allows efficiently handling cases of structures contained withing the periodic unit cell touching or not touching its boundaries as well as structures that protrude beyond the unit cell boundaries. PM-FEM is demonstrated to have about the same or even higher performance than its parent non-periodic code. The demonstrated numerical examples show the efficiency of PM-FEM for highly complex structures with 1D, 2D, and 3D periodicities. © 2024, CC BY-NC-ND.

关键词： Convolution

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LIPSS formation on Ni surface using mixed near-infrared laser beam harmonics

LIPSS formation on Ni surface using mixed near-infrared lase...

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2023 Sharjah International Conference on Physics of Advanced materials, SICPAM 2023

作者： Khalil, Baha Alnaser, Ali S Materials Science and Engineering Program College of Arts and Sciences American University of Sharjah PO Box 26666 Sharjah United Arab Emirates Department of Physics American University of Sharjah PO Box 26666 Sharjah United Arab Emirates

Generation of laser-induced periodic surface structures (LIPSS) is investigated with femtosecond laser pulses with 1030nm wavelength and its second and its harmonics. The second (λ2ω = 515nm) and third harmonics (λ3ω = 343nm) beams in addition to their combination were utilized to control the period of the LIPSS on a Ni surface. The resulting periodicity of the formed structures was ∼0.42μm, 0.22μm, and 0.33μm respectively for the second harmonic beam, third harmonic beam, and their combination. This method demonstrates a direct way to control the periodicities on a metal target by employing an individual laser beam wavelength to induce a variable range of LIPSS periods. © Published under licence by IOP Publishing Ltd.

关键词： Infrared devices

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Multidisciplinary Control Co-Design Optimization of Anguilliform-Swimming Soft Fluidic Robots

Multidisciplinary Control Co-Design Optimization of Anguilli...

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IEEE International Conference on Soft Robotics (RoboSoft)

作者： Andrew Fletcher Ru Xiang Luca Scotzniovsky Jacobo Cervera-Torralba Michael T. Tolley John T. Hwang Department of Mechanical and Aerospace Engineering Materials Science and Engineering Program University of California San Diego (UCSD) La Jolla CA USA

ISBN: (数字)9798331520205

ISBN: (纸本)9798331520212

Anguilliform-swimming soft fluidic robots hold great promise for a range of underwater applications. However, because they leverage the complex dynamics of soft bodies interacting with fluids, it is challenging to use intuition to determine design parameters. Multidisciplinary design optimization offers a promising solution to this challenge by providing an automated and systematic method for leveraging computational models to find optimal design parameters. This study investigates a method for multidisciplinary control co-design optimization of anguilliform-swimming soft robots, using physics-based models to optimize shape and control parameters. The modeling framework includes a geometry-centric approach for geometry modeling and parameterization, a three-dimensional finite element model for structural mechanics, and an unsteady panel method for fluid dynamics. The approach is tested by applying it to the optimization of a pre-existing eel-inspired soft robot. Model parameters are estimated from existing experimental data, and two control co-design optimizations, with high-level and multilevel shape parameterizations, are performed to minimize energy cost. The optimized actuator module is manufactured, and used to collect additional data for re-estimating the structural model parameters. The optimization is performed again with the updated model parameters, showing a simulated energy cost reduction of 45% and the prescribed 128% speed increase compared to the baseline design with optimized control and updated model parameters. These results demonstrate the potential of the proposed optimization approach to advance the performance of anguilliform-swimming soft fluidic robots.

关键词： Geometry Solid modeling Costs Shape Computational modeling Fluid dynamics Soft robotics Data models Manufacturing Optimization

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DEVELOPMENT OF A LOW THERMAL EXPANSION SLA RESIN FOR NICKEL PLATING APPLICATIONS

DEVELOPMENT OF A LOW THERMAL EXPANSION SLA RESIN FOR NICKEL ...

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SAMPE 2022 Conference and Exhibition

作者： Hammond, Connor Tate, Jitendra Texas State University Ingram School of Engineering 601 University Drive San MarcosTX78666 United States Materials Science Engineering and Commercialization Program

ISBN: (纸本)9781934551417

Applications in the aerospace and defense industries are demanding stronger and lighter parts for use in aircraft and spacecraft. Additive manufacturing (AM) has allowed engineers to create complex parts that would be difficult or even impossible to create through standard manufacturing methods. Stereolithography (SLA) additive manufacturing offers an easy and affordable way to create extremely complex and detailed geometries by selectively curing thin layers of a photopolymer resin. To increase part performance, a nickel coating can then be applied to increase strength, chemical resistance, and heat deflection. This works well in lab environments, but in harsh conditions such as those presented in aerospace applications, large thermal gradients cause the nickel and resin to expand at different rates. This causes high internal stresses and can even result in part failure. The development of a strong, reliable resin that could match the coefficient of thermal expansion of nickel could fill a gap in additive manufacturing between fully plastic or metal parts, allowing for production of high-performance parts. In this paper we will cover the development of an SLA resin with good mechanical properties and a thermal expansion rate similar nickel for aerospace applications. Copyright 2022. Used by the Society of the Advancement of Material and Process engineering with permission.

关键词： 3D printers

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Formability Analysis of Metal–Polymer Sandwich Composites Made of Al and PE Sheets Using Numerical Simulations 1

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12th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2022

作者： Bekele, Tsegaye Janaki Ramulu, Perumalla Beri, Habtamu Siraji, Amrela Praveen Kumar Reddy, P. Program of Mechanical Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia Centre of Excellence for Advanced Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia School of Technology Gitam Deemed to Be University and Mahaveer Institute of Science and Technology Hyderabad India

ISBN: (数字)9783031062124

ISBN: (纸本)9783031062117

Metal/polymer/metal (MPM) sandwiched composites are in the class of capable engineering materials which give outstanding strength-to-weight ratios because of their comparatively low density. These materials are vital constituents within the automobile, aerospace, marine, and civil construction industries as substitutes for sheet metals that considerably reduce weight while not compromising practicality such as load bearing capacity stiffness and flexibility. For these materials to be utilised within the aforesaid industries, they need to bear numerous forming processes. This paper investigates the formability of metal-polymer sandwich composites made of AA-PE-AA (APA) and Galvanised Steel-PE-Galvanised Steel (GPG) considering the adhesion strength via numerical simulation. For evaluating the formability, the actual limit dome height (LDH)—bi-axial strain path—test setup is simulated using FEM. The results analysed are forming limit diagram (FLD), punch force distribution, and dome height at diverse conditions of punch velocity and friction. All the numerical simulations were performed using Altair Hyperworks with various blank sizes. The results are noted as FLD and dome height at varied conditions. A comparison is made to represent the best combinations for formability of the sandwich composites. Maximum formability and dome height are attained at low friction conditions and forming speed. © 2022, The Minerals, Metals & materials Society.

关键词： Adhesion

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Design of the Continuous Gravity-Driven Multiple-Effect Thermal System (G-METS) for Efficient Low-Cost Magnesium Recycling

Design of the Continuous Gravity-Driven Multiple-Effect Ther...

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Magnesium Technology Symposium held during the 152nd TMS Annual Meeting and Exhibition, TMS 2023

作者： Sehar, Daniel Mcarthur Espinosa, Gabriel Telgerafchi, Armaghan Ehsani Chinwego, Chinenye Lynch, Keira Perrin, Benjamin Powell, Adam Materials Science and Engineering Program Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States 100 Institute Rd WorcesterMA01609 United States

ISBN: (纸本)9783031226458

Recent global supply shortages, combined with need for light-weight structural components for efficient transportation, have led to very high prices for magnesium due to its low density and high part stiffness/weight. This study continues prior work on magnesium recycling using multiple-effect distillation with gravity as the parameter to create the pressure difference between effects, called G-METS. The long-term vision is for continuous distillation, but experiments to date have only used batch distillers with maximum rate of 1 kg/h. and minimum energy consumption of 2 kWh/kg. This study presents the design of laboratory-scale continuous distiller including a custom-made furnace to sustain a high-power density and temperature gradient for rapid boiling and efficient recovery of magnesium. © The Minerals, Metals & materials Society 2023.

关键词： Distillation

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Renewable energy application of pulsed laser annealing perovskite quantum dots materials

Renewable energy application of pulsed laser annealing perov...

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Nanoscale and Quantum materials: From Synthesis and Laser Processing to Applications 2025

作者： Lin, Yen-Ting Hsieh, Jui-Ting Tsai, Meng-Lin Yang, Chan-Shan Institute and Undergraduate Program of Electro-Optical Engineering National Taiwan Normal University Taipei Taiwan Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan Micro/Nano Device Inspection and Research Center National Taiwan Normal University Taiwan Applied High Entropy Technology Center National Cheng Kung University Tainan Taiwan

ISBN: (纸本)9781510684522

With the advancement of the global economy and technology, energy demand has become an urgent issue, prompting heightened attention to environmental friendliness and sustainable development. Solar energy, as a significant renewable resource, has garnered widespread attention despite facing challenges in conversion efficiency. Perovskite materials, due to their cubic crystal structure exhibiting excellent optoelectronic properties and a broad spectrum response, along with low manufacturing costs, have emerged as a recent research focus. These materials have shown remarkable potential in solar cells, light-emitting devices, and photodetectors, offering high efficiency, tunable bandgaps, and scalable fabrication processes. This study enhances the optical performance and stability of perovskite quantum dots through femtosecond pulse laser annealing technology, thereby improving their quantum yield. Advanced optical systems are employed for analysis, fully leveraging the advantages of perovskite materials in photovoltaic conversion. This research not only provides foundational solutions to pressing energy challenges but also promotes the transition of society towards cleaner and more sustainable energy technologies. Moreover, it contributes to the advancement of more efficient solar technologies, promoting innovation and development in future energy sources, and effectively reducing dependence on non-renewable energy. This is of significant importance for environmental protection, ensuring a better living environment for the future generations. © 2025 SPIE.

关键词： Nanocrystals

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Flexoelectric Catalysts Based on Hierarchical Wrinkling Surface of Centrosymmetric High-Entropy Oxide

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ACS Nano 2023年第17期17卷 17417-17426页

作者： Wu, Ping Yun Le, Kim Tuyen Lin, Hsun-Yen Chen, Yu-Ching Wu, Po-Han Wu, Jyh Ming Department of Materials Science and Engineering National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan High Entropy Materials Center National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan Ph.D. Program in Prospective Functional Materials Industry National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu300 Taiwan

A high-entropy oxide nanocomposite with Ag(CuZn)(AlCr)2O4 and CuO phases is fabricated to form an abundantly hierarchical wrinkled surface. Application of a mechanical force to the nanocomposite resulted in a nonhomogeneous strain gradient at the interface between the Ag(CuZn)(AlCr)2O4 and CuO phases, changing the local charge distribution and creating flexoelectric polarization that delayed electron/hole recombination. Transmission electron microscopy energy-dispersive X-ray spectroscopy mapping revealed that the Ag, Cu, Zn, Al, Cr, and O elements were highly distributed throughout the nanocomposite. The nanocomposite produced 2116 μmol·g-1 h-1 of H2 without external light irradiation, which is 980% higher than the H2 produced by the same nanocomposite under the photocatalytic process. A strong electrical field is observed at the interface between the Ag(CuZn)(AlCr)2O4 and CuO phases, demonstrating that a flexoelectric potential (flexopotential) is established at the structural boundaries because the strain gradient is localized at these interfaces. The nanocomposite is a promising approach for environmentally friendly energy production. © 2023 American Chemical Society.

关键词： Nanocomposites

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Computational Modeling of Radiation Effects in Carbon Fiber-Reinforced Polyethylene Composites 38

Computational Modeling of Radiation Effects in Carbon Fiber-...

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38th Technical Conference of the American Society for Composites, ASC 2023

作者： Li, Fuyue Woodrough, Mary Deo, Chaitanya School of Materials Science and Engineering Georgia Institute of Technology North Avenue AtlantaGA30332 United States Nuclear and Radiological Engineering Program GWW School of Mechanical Engineering Georgia Institute of Technology North Avenue AtlantaGA30332 United States

ISBN: (纸本)9781605956916

Radiation effect in carbon fiber-filled polyethylene composites are of importance in space and aircraft applications. A two-fold approach is employed to study radiation effects in carbon nanotube polyethylene as the exemplar. First, a radiation transport model is created with a single-wall carbon nanotube (SWCNT) as thin carbon slab superimposed on a slab of medium-density polyethylene matrix. Different weight fractions of SWCNT are examined and compared with an integrated model for the shielding abilities of galactic cosmic radiation. Second, molecular dynamics simulation with bond-order force field are conducted for 350 eV carbon recoil cascade simulation. Preliminary results discuss the effect of SWCNT on the radiation damage of crystalline polyethylene. Transport simulation demonstrate the efficacy of the slab model in predicting the shielding abilities and concluded that the dose increases with increasing SWCNT filler. Molecular dynamics simulations demonstrate that adding SWCNT enhances the radiation resistance with fewer free molecules produced. © 2023 by DEStech Publications, Inc. and American Society for Composites. All rights reserved.

关键词： Single-walled carbon nanotubes (SWCN)

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