检索结果-内蒙古大学图书馆

Research progress in electrospinning engineering for all-solid-state electrolytes of lithium metal batteries

Journal of Energy Chemistry 2021年第10期30卷 253-268,I0008页

作者： Manxi Wang Yaling Wu Min Qiu Xuan Li Chuanping Li Ruiling Li Jiabo He Ganggang Lin Qingrong Qian Zhenhai Wen Xiaoyan Li Ziqiang Wang Qi Chen Qinghua Chen Jinhyuk Lee Yiu-Wing Mai Yuming Chen College of Environmental Science and Engineering Fujian Normal UniversityFuzhou 350000FujianChina Fujian Key Laboratory of Innate Immune Biology Biomedical Research Center of South Chinaand College of Life ScienceFujian Normal UniversityFuzhou 350000FujianChina College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350000FujianChina State Grid Fujian Maintenance Company Fuzhou 350000FujianChina CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350000FujianChina Department of Nuclear Science and Engineering and Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139United States Department of Mining and Materials Engineering McGill UniversityMontréalQC H3A 0C5Canada Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronics Engineering J07The University of SydneyNSW 2006Australia State Key Laboratory of Structural Chemistry Fuzhou 350000FujianChina

Owing to safety issue and low energy density of liquid lithium-ion batteries(LIBs),all-solid-state lithium metal batteries(ASLMBs)with unique all-solid-state electrolytes(SEs)have attracted wide *** arises mainly from the advantages of the SEs in the suppression of lithium dendrite growth,long cycle life,and broad working temperature range,showing huge potential applications in electronic devices,electric vehicles,smart grids,and biomedical ***,SEs suffer from low lithiumion conductivity and low mechanical integrity,slowing down the development of practical *** engineering is of great efficiency in tuning the structure and composition of the SEs with improved lithium-ion conductivity and mechanical *** various available technologies for nanostructure engineering,electrospinning is a promising technique because of its simple operation,cost-effectiveness,and efficient integration with different *** this review,we will first give a simple description of the electrospinning ***,the use of electrospinning technique in the synthesis of various SEs is summarized,for example,organic nanofibrous matrix,organic/inorganic nanofibrous matrix,and inorganic nanofibrous matrix combined with other *** current development of the advanced architectures of SEs through electrospinning technology is also presented to provide references and ideas for designing high-performance ***,an outlook and further challenges in the preparation of advanced SEs for ASLMBs through electrospinning engineering are given.

关键词： Solid-state composite electrolyte Lithium metal batteries Electrospinning engineering Organic/inorganic matrices

来源：评论

学校读者我要写书评

暂无评论

Impact of Quantum Well Thickness on Efficiency Loss in InGaN/GaN LEDs: Challenges for Thin-Well Designs

arXiv

引用

arXiv 2025年

作者： Li, Xuefeng Pant, Nick Rahman, Sheikh Ifatur Armitage, Rob Rajan, Siddharth Kioupakis, Emmanouil Feezell, Daniel University of New Mexico AlbuquerqueNM87106 United States Department of Materials Science & Engineering University of Michigan Ann ArborMI48109 United States Applied Physics Program University of Michigan Ann ArborMI48109 United States Department of Electrical and Computer Engineering The Ohio State University ColumbusOH43210 United States Lumileds LLC San JoseCA95131 United States Department of Materials Science and Engineering The Ohio State University ColumbusOH43210 United States

We investigate the impact of quantum well (QW) thickness on efficiency loss in c-plane InGaN/GaN LEDs using a small-signal electroluminescence (SSEL) technique. Multiple mechanisms related to efficiency loss are independently examined, including injection efficiency, carrier density vs. current density relationship, phase space filling (PSF), quantum confined stark effect (QCSE), and Coulomb enhancement. An optimal QW thickness of around 2.7 nm in these InGaN/GaN LEDs was determined for quantum wells having constant In composition. Despite better control of deep-level defects and lower carrier density at a given current density, LEDs with thin QWs still suffer from an imbalance of enhancement effects on the radiative and intrinsic Auger-Meitner recombination coefficients. The imbalance of enhancement effects results in a decline in internal quantum efficiency (IQE) and radiative efficiency with decreasing QW thickness at low current density in LEDs with QW thicknesses below 2.7 nm. We also investigate how LED modulation bandwidth varies with quantum well thickness, identifying the key trends and their implications for device performance. Copyright © 2025, The Authors. All rights reserved.

关键词： Semiconductor quantum wells

来源：评论

学校读者我要写书评

暂无评论

Multiscale and Multimodal Characterization of Recrystallized and Non-Recrystallized Grains During Static Recrystallization in a Hot-Compressed Mg-3.2Zn-0.1Ca Wt.% Alloy

SSRN

引用

SSRN 2023年

作者： Lee, Sangwon Berman, Tracy D. Yildirim, Can Detlefs, Carsten Allison, John E. Bucsek, Ashley Department of Mechanical Engineering University of Michigan Ann ArborMI United States Department of Materials Science and Engineering University of Michigan Ann ArborMI United States European Synchrotron Radiation Facility GrenobleCedex 9 France

We present a multiscale study on the recovery and recrystallization of an 80% hot-compressed Mg-3.2Zn-0.1Ca wt.% (ZX30) alloy using high-resolution X-ray diffraction (HR-XRD) statistical analysis and dark field X-ray microscopy (DFXM). Using HR-XRD statistical analysis, we track more than 8,000 sub-surface non-recrystallized and recrystallized grains during the recovery and recrystallization processes during in-situ annealing. For each recrystallized and non-recrystallized grain, the grain-specific change in orientation and relative volume are measured as a function of annealing time. The results show that the initial grain volume plays an important role in determining which grains from the as-deformed condition are likely to survive the annealing process, as opposed to being consumed by recrystallization. At several points during the annealing process, we 'zoom in' to individual recrystallized and non-recrystallized grains using DFXM. The results show small intragranular variations in elastic lattice strain and misorientation with a spatial resolution of ~100 nm. This combination of HR-XRD statistical analysis and DFXM enables a multiscale, multimodal diffraction microstructure imaging that is particularly useful for small and/or highly deformed grains that are often difficult to resolve using more standard 3DXRD techniques. © 2023, The Authors. All rights reserved.

关键词： Recovery

来源：评论

学校读者我要写书评

暂无评论

Deep Learning for Multiscale Damage Analysis via Physics-Informed Recurrent Neural Network

arXiv

引用

arXiv 2022年

作者： Deng, Shiguang Hosseinmardi, Shirin Apelian, Diran Bostanabad, Ramin ACRC Materials Science and Engineering University of California Irvine United States Department of Mechanical and Aerospace Engineering University of California Irvine United States

Direct numerical simulation of hierarchical materials via homogenization-based concurrent multiscale models poses critical challenges for 3D large scale engineering applications, as the computation of highly nonlinear and path-dependent material constitutive responses at the lower scale causes prohibitively high computational costs. In this work, we propose a physics-informed data-driven deep learning model as an efficient surrogate to emulate the effective responses of heterogeneous microstructures under irreversible elasto-plastic hardening and softening deformation. Our contribution contains several major innovations. First, we propose a novel training scheme to generate arbitrary loading sequences in the sampling space confined by deformation constraints where the simulation cost of homogenizing microstructural responses per sequence is dramatically reduced via mechanistic reduced-order models. Second, we develop a new sequential learner that incorporates thermodynamics consistent physics constraints by customizing training loss function and data flow architecture. We additionally demonstrate the integration of trained surrogate within the framework of classic multiscale finite element solver. Our numerical experiments indicate that our model shows a significant accuracy improvement over pure data-driven emulator and a dramatic efficiency boost than reduced models. We believe our data-driven model provides a computationally efficient and mechanics consistent alternative for classic constitutive laws beneficial for potential high-throughput simulations that needs material homogenization of irreversible behaviors. © 2022, CC BY.

关键词： Cost engineering

来源：评论

学校读者我要写书评

暂无评论

Nitrogen-Doping Assisted Local Chemical Heterogeneity and mechanical Properties In Cocrmow Alloys Manufactured Via Laser Powder Bed Fusion

SSRN

引用

SSRN 2024年

作者： Jiang, Wenting Li, Ruidi He, Junyang Ni, Song Wang, Li Chen, Zibin Huang, Yi Li, Caiju Yi, Jianhong Song, Min State Key Laboratory of Powder Metallurgy Central South University Changsha410083 China Research Institute for Advanced Manufacturing Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Hong Kong Department of Design and Engineering Faculty of Science and Technology Bournemouth University Poole DorsetBH12 5BB United Kingdom Materials Research Group Department of Mechanical Engineering University of Southampton SouthamptonSO17 1BJ United Kingdom Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming650093 China

CoCrMoW alloys with different nitrogen (N) additions (0, 0.05, 0.1 and 0.2 wt.%) were prepared via laser powder bed fusion (LPBF). The effects of N content on the microstructure and mechanical properties were investigated. The results indicate that the LPBFed CoCrMoW alloy with 0.1 wt.% N addition (0.1N alloy) shows the best combination of mechanical properties with a yield strength of ~ 983 MPa and an elongation of ~ 19%. Both the LPBF process and the N addition impose great effects on suppressing the g to e martensitic transformation, resulting in a decrease in the width and amount of e laths/stacking faults. Besides, the N addition promotes the segregation of elements Mo, W, and Si along the cellular sub-grain boundaries (CBs), forming fine and discontinuous precipitates rich in Mo, W and Si along the CBs in the 0.1N alloy, but dense and continuous (Mo,W)5Si3 precipitates along the CBs in the 0.2N alloy. The (Mo,W)5Si3 precipitates with a tetragonal structure were observed and characterized for the first time in the Co-Cr based alloys. The negative mixing enthalpy between the non-metallic elements N, Si and the metallic elements Mo, W, Cr, and the rapid solidification induced segregation of high melting point elements such as Mo and W along CBs during LPBF process, synergistically contribute to the chemical heterogeneity in the alloys. The pure FCC matrix, the slightly increased segregation of Mo, W, Si elements and fine precipitates along the CBs contribute to the good combination of strength and elongation of the 0.1N alloy. However, though pure FCC phase was present in the 0.2N alloy, the dense and continuous (Mo,W)5Si3 precipitates along CBs acted as nucleation sites for cracks, deteriorating the elongation of the alloy. Overall, it is possible to tune the mechanical properties of the LPBFed CoCrMoW alloy by adjusting the local chemical heterogeneity. © 2024, The Authors. All rights reserved.

关键词： Chromium alloys

来源：评论

学校读者我要写书评

暂无评论

Optimization of High-Temperature Oxidation Resistance for Near-Α Ti Alloy by Scandium Addition

SSRN

引用

SSRN 2023年

作者： Zhong, Xiuyang Deng, Tongsheng Xiao, Wenlong Zhong, Ming Lai, Yunhao Ojo, Olanrewaju A. Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou341000 China School of Materials Science and Engineering Beihang University Beijing100191 China Department of Mechanical Engineering University of Manitoba WinnipegMBR3T 5V6 Canada

In this study, the Ti-6.5Al-2.5Sn-9Zr-0.5Mo-1Nb-1W-0.3Si near-α titanium alloy was prepared by the rare-earth scandium (Sc) microalloying. Influences of Sc on microstructure and oxidation resistance were investigated by isothermal oxidation at 650 ℃. Results showed that Sc promotes oxides refinement, adjusts the distribution of Al2O3 scales and reduces flocculent oxides formation by W-element segregation. However, the addition of Sc in alloy accelerates the dissolution of the residual β phase and the precipitation of silicides, resulting in the cracking of the oxide films and deteriorating the oxidation resistance. Finally, the 0.3 wt.% Sc alloy exhibits superior resistance to high-temperature oxidation. © 2023, The Authors. All rights reserved.

关键词： Microstructure

来源：评论

学校读者我要写书评

暂无评论

Temporal refraction and reflection in modulated mechanical metabeams: theory and physical observation

arXiv

引用

arXiv 2025年

作者： Wang, Shaoyun Shao, Nan Chen, Hui Chen, Jiaji Qian, Honghua Wu, Qian Duan, Huiling Alù, Andrea Huang, Guoliang Department of Mechanical and Aerospace Engineering University of Missouri ColumbiaMO65211 United States Center for Mechanics Plus Under Extreme Environments School of Mechanical Engineering and Mechanics Ningbo University Ningbo315211 China Photonics Initiative Advanced Science Research Center City University of New York New YorkNY United States Physics Program Graduate Center City University of New York New YorkNY United States Department of Mechanics and Engineering Science College of Engineering Peking University Beijing100871 China

Wave reflection and refraction at a time interface follow different conservation laws compared to conventional scattering at a spatial interface. This study presents the experimental demonstration of refraction and reflection of flexural waves across a temporal boundary in a continuum-based mechanical metabeam, and unveils opportunities that emerge by tailoring temporal scattering phenomena for phononic applications. We observe these phenomena in an elastic beam attached to an array of piezoelectric patches that can vary in time the effective elastic properties of the beam. Frequency conversion and phase conjugation are observed upon a single temporal interface. These results are consistent with the temporal Snell’s law and Fresnel equations for temporal interfaces. Further, we illustrate the manipulation of amplitude and frequency spectra of flexural wave temporal refraction and reflection through multi-stepped temporal interfaces. Finally, by implementing a smooth time variation of wave impedance, we numerically and experimentally demonstrate the capabilities of the temporal metabeam to realize waveform morphing and information coding. Our findings lay the foundation for developing time-mechanical metamaterials and time-phononic crystals, offering new avenues for advanced phonon manipulation in both wave amplitude and frequency. © 2025, CC BY.

关键词： Phonons

来源：评论

学校读者我要写书评

暂无评论

Electric-Field-Controlled Chemical Reaction via Piezo-Chemistry Creates programmable Material Stiffness

arXiv

引用

arXiv 2025年

作者： Wang, Jun Wang, Zhao Ayarza, Jorge Frankel, Ian Huang, Chao-Wei Qian, Kai Dong, Yixiao Huang, Pin-Ruei Kloska, Katie Zhang, Chao Zou, Siqi Mason, Matthew Liu, Chong Boechler, Nicholas Esser‐Kahn, Aaron P. Pritzker School of Molecular Engineering University of Chicago ChicagoIL60637 United States Department of Mechanical and Aerospace Engineering University of California San Diego San DiegoCA92121 United States College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou215123 China Department of Chemistry Princeton University PrincetonNJ08540 United States

The spatial and temporal control of material properties at a distance has yielded many unique innovations including photo-patterning, 3D-printing, and architected material design. To date, most of these innovations have relied on light, heat, sound, or electric current as stimuli for controlling the material properties. Here, we demonstrate that an electric field can induce chemical reactions and subsequent polymerization in composites via piezoelectrically-mediated transduction. The response to an electric field rather than through direct contact with an electrode is mediated by a nanoparticle transducer, i.e., piezoelectric ZnO, which mediates reactions between thiol and alkene monomers, resulting in tunable moduli as a function of voltage, time, and the frequency of the applied AC power. The reactivity of the mixture and the modulus of a naïve material containing these elements can be programmed based on the distribution of the electric field strength. This programmability results in multi-stiffness gels. Additionally, the system can be adjusted for the formation of an electro-adhesive. This simple and generalizable design opens new avenues for facile application in adaptive damping and variable-rigidity materials, adhesive, soft robotics, and potentially tissue engineering. © 2025, CC BY.

关键词： Electropolymerization

来源：评论

学校读者我要写书评

暂无评论

Linking Molecular Origin of Melt Fragility Index with Topological Phases of Network Glasses

SSRN

引用

SSRN 2023年

作者： Gogi, Vamshi Kiran Mandal, Avik Welton, Aaron Mohanty, Chandi Bhosle, Siddhesh Chakraborty, Shibalik Gunasekera, Kapila Chakravarty, Soumendu Almutairi, Badriah Boolchand, Punit Department of Electrical Engineering and Computer Science University of Cincinnati CincinnatiOH45221-0030 United States Department of Mechanical and Materials Engineering University of Cincinnati CincinnatiOH United States Department of Physics University of Cincinnati CincinnatiOH United States

Network glasses are composed of three topological phases: flexible, intermediate, and stressed-rigid. Intermediate Phase (IP) glasses form compact, rigid, and stress-free networks with no Open Degrees of Freedom (ODF). IP melts are observed to be super-strong with the lowest fragility index, m = 15 due to the absence of ODF in the parent glass. This feature is general and observed in multiple selenide, sulfide, and modified oxide glasses can be traced to Isostatically Rigid Local Structures (ISRLSs) formed in the IP. On the other hand, the flexible and stressed-rigid phase glasses form non-compacted and stressed networks with increasing residual pressure as the count of ODF increases. Their melts are found to be fragile and display fragility indices m > 20 as the count of the ODF in the glass increases and the count of ISRLSs dissipates. © 2023, The Authors. All rights reserved.

关键词： Degrees of freedom (mechanics)

来源：评论

学校读者我要写书评

暂无评论

4d-Printed Niti Auxetic Metamaterial with Enhanced Functionality Via Deposition of Nano-Ni Layer

SSRN

引用

SSRN 2024年

作者： Abolhasani, Daniyal Lee, Wookjin VanTyne, Chester J. Moon, Young Hoon Center for Innovative Technology on Advanced Forming School of Mechanical Engineering Pusan National University Busan46241 Korea Republic of School of Material Science and Engineering Pusan National University Busan46241 Korea Republic of Department of Metallurgical and Materials Engineering Colorado School of Mines GoldenCO80401 United States

The aerospace and energy conversion industries utilize superelastic metallic metamaterials fabricated by additive manufacturing (AM). Currently, printing samples with "residual particle-free" surfaces requires post-cleaning techniques such as chemical and electrochemical etching. However, the high concentration of stress and cracking near the nodes and sharp edges can cause brittle fracture, strength reduction, and energy absorption. Moreover, topological optimization can significantly increase the weight of a structure. To overcome these challenges, in this study, we utilized the benefits of multicomponent structures and nanomaterials possessing high capillary effects and low melting points. Specifically, a thin layer of nano-Ni was deposited on the surfaces of NiTi auxetic structures printed using micro-Ni–Ti powders. The results showed that high-performance functional structures with reliable surfaces, high strength, high energy absorption, and constant Poisson’s ratios for a given deformation could be achieved. This was attributed to a low stress-induced martensite formed during laser processing and a low residual stress, computed experimentally and by simulations. Although the loss factor or dissipated energy during superelastic cycling was enhanced, the superelastic reproducibility was lowered in the samples fabricated using the developed method. This was attributed to the higher strain hardening and dislocation generation, despite the developed approach resulting in a very high superelastic recovery in the initial cycles. The findings of this study provide a framework for designing high-performance functional structures using AM and nanomaterials for energy-absorbing devices with high resistance to vibration. © 2024, The Authors. All rights reserved.

关键词： Binary alloys

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：