检索结果-内蒙古大学图书馆

High-performance bifunctional polarization switch chiral metamaterials by inverse design method

npj Computational materials 2019年第1期5卷 324-331页

作者： Chuanbao Liu Yang Bai Ji Zhou Qian Zhao Yihao Yang Hongsheng Chen Lijie Qiao Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Environmental Fracture(Ministry of Education) Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of New Ceramics and Fine Processing Tsinghua UniversityBeijing 100084China State Kay Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory for Modern Optical Instrumentation Zhejiang UniversityHangzhou 310027China

Multifunctional polarization controlling plays an important role in modern photonics,but their designs toward broad bandwidths and high efficiencies are still rather ***,by applying the inverse design method of model-based theoretical paradigm,we design cascaded chiral metamaterials for different polarization controls in oppositely propagating directions and demonstrate their broadband and high-efficiency performance theoretically and *** with the derivation of scattering matrix towards specified polarization control,a chiral metamaterial is designed as a meta-quarter-wave plate for the forward propagating linearly polarized wave,which converts the x-or y-polarized wave into a nearly perfect left-or right-handed circularly polarized wave;intriguingly,it also serves as a 45°polarization rotator for the backward propagating linearly polarized *** bifunctional metamaterial shows a high transmission as well as a broad bandwidth due to the Fabry–Perot-like interference *** the similar approach,an abnormal broadband meta-quarter-wave plate is achieved to convert the forward x-and y-polarized or the backward y-and x-polarized waves into left-and right-handed circularly polarized waves with high transmission *** integration of multiple functions in a single structure endows the cascaded chiral metamaterials with great interests for the high-efficiency polarization-controlled applications.

关键词： chiral polarized inverse

来源：评论

学校读者我要写书评

暂无评论

Application of finite element analysis in properties test of finger-jointed lumber

引用

Journal of Bioresources and Bioproducts 2020年第2期5卷 124-133页

作者： Sheng He Lanying Lin Zaixing Wu Zhangmin Chen China National Bamboo Research Center Engineering Technology Research Center for Building and Decorating Materials of BambooState Forestry AdministrationHangzhou 310012China Key Laboratory of Bamboo High-efficient Processing of Zhejiang Province Hangzhou 310012China Research Institute of Wood Industry Chinese Academy of ForestryBeijing 100091China

Finger-jointed lumber production has now become the most extensively used method for spliced lumbers jointing together *** properties of finger-jointed lumber are affected by many different factors such as the *** main mechanical properties to be tested for struc-tural use finger-jointed lumber include the modulus of elasticity in static bending and the bending *** most commonly used method for testing these properties at present is the experi-mental *** this study,we used finite element method to investigate the end-pressure range,the modulus of elasticity in static bending and the bending strength for Pinus sylvistriv ***-jointed lumber under three different fitness ratios(0 mm,0.1 mm,0.3 mm).With finite element analysis(FEA)modelling results compared with the experimental test results,it is possible to find the relationship between these two kinds of results and use the FEA to predict the properties of finger-jointed *** FEA applied in the end pressure tests showed a narrower range com-pared with the modelling *** indicated that the FEA could be used in the prediction of the end pressure for finger-jointed *** modelling results for modulus of elasticity(MOE)test and bending strength(MOR)test showed about 20%discrepancies compared with the experimen-tal ***,the MOE modelling results showed the same trend as experimental results under three different fitness levels while the MOR modelling results showed the different *** can be concluded that the FEA is a feasible way in analysing the properties of finger-jointed lumber if the errors could be eliminated *** modifications should be made in order to realize the prediction of the properties of finger-jointed lumber more accurately.

关键词： Finite element analysis Finger jointed lumber End-pressure Modulus of elasticity in static bending Bending strength

来源：评论

学校读者我要写书评

暂无评论

Phase Compositions and Mechanical Properties of Chinese Blue-and-white Porcelain

Phase Compositions and Mechanical Properties of Chinese Blue...

引用

作者： Gangqin Shao Xiaobin Zhong Xinyi Feng Yong Zhang Can Zhu Zhenchang Zhong Jun Wang Qi Liu Hongbin Li Zhaobiao Qiu Youyan Zhong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Chinese blue-and-white porcelain has engendered a unique appeal and gained a worldwide popularity throughout history, with its unmatched translucency of the body, the shine of the glaze, the permanency of the variegated blue tints, the fineness of decorations and the mysteries behind the manufacturing. Mechanical properties are vital for the manufacturing, transportation and usage of this kind of stunner. In this work, the mechanical properties of Chinese blue-and-white porcelain with Hakka style and Dabu geographical indication were optimized, based on the distinct characteristics of local resources.

关键词： CSW Phase Compositions and Mechanical Properties of Chinese Blue-and-white Porcelain

来源：评论

学校读者我要写书评

暂无评论

Si/Cu3_Si@C Composite Encapsulated in CNTs Network as High Performance Anode for Lithium Ion Batteries

引用

Journal of Wuhan University of technology(materials Science) 2019年第5期34卷 1055-1061页

作者： LU Haoqi XUE Lihong ZHANG Wuxing State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China BTR New Energy Materials Inc. Shenzhen 518106China

Si/Cu3Si@C composites encapsulated in CNTs network(SCC-CNTs) were synthesized via the combination of ball-milling and CVD methods. SCC-CNTs consist of conductive Cu3Si, amorphous carbon layer, cross-linked CNTs, and the etched pores, which can play the synergistic effects on the improvement of electronic conductivity and Li^+ diffusion. The volume expansion of Si anode is also suppressed during the electrochemical process. The SCC-CNTs composites demonstrate a remarkably improved electrochemical performance compared with pure Si, which can deliver a discharge capacity of 2 171 mAh·g^-1 at 0.4 A·g^-1 with ICE of 85.2%, and retain 1197 mAh· g^-1 after 150 cycles. This work provides a facile approach to massively produce the high-performance Si-based anode materials for next-generation LIBs.

关键词： lithium-ion battery anodes silicon-based composite CNTs Cu3Si

来源：评论

学校读者我要写书评

暂无评论

Large-scale current collectors for regulating heat transfer and enhancing battery safety

Nature Chemical Engineering

引用

Nature Chemical Engineering 2024年 542-551页

作者： Lun Li Huazhang Zhang Xin Zhao Daping He Wei Shu Zixin Zhang Yu Zhao Xingchuan Li Zongkui Kou Yong Xiao Francis Verpoort Liqiang Mai Jinlong Yang Rui Tan CheeTong John Low Cheng Li Yajun Zhang Hewu Wang Hubei Engineering Research Center of RF-Microwave Technology and Application School of Physics and Mechanics Wuhan University of Technology Wuhan China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing State Key Laboratory of Silicate Materials for Architectures School of Materials Science and Engineering Wuhan University of Technology Wuhan China Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering Shenzhen University Shenzhen China Department of Chemical Engineering Swansea University Swansea UK Warwick Electrochemical Engineering Group WMG Energy Innovation Centre University of Warwick Warwick UK School of Vehicle and Mobility Tsinghua University Beijing China

Thermal runaway, a major battery safety issue, is triggered when the local temperature exceeds a threshold value resulting from slower heat dissipation relative to heat generation inside the cell. However, improving internal heat transfer is challenged by the low thermal conductivity of metal current collectors (CCs) and challenges in manufacturing nonmetal CC foils at large scales. Here we report a rapid temperature-responsive nonmetallic CC that can substitute benchmark Al and Cu foils to enhance battery safety. The nonmetallic CC was fabricated through a continuous thermal pressing process to afford a highly oriented Gr foil on a hundred-meter scale. This Gr foil demonstrates a high thermal conductivity of 1,400.8 W m−1K−1, about one order of magnitude higher than those of Al and Cu foils. Importantly, LiNi0.8Co0.1Mn0.1O2||graphite cells integrated with these temperature-responsive foils show faster heat dissipation, eliminating the local heat concentration and circumventing the fast exothermic aluminothermic and hydrogen-evolution reactions, which are critical factors causing the thermal failure propagation of lithium-ion battery packs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Enhancement of anomalous Hall effect in SrIrO3/NiCo2O4 heterostructures induced by interfacial charge transfer

引用

Science China materials 2025年

作者： Kang, Penghua Zhou, Guowei Zhao, Ye Ren, Guoxiu Ji, Jiahui Jin, Chao Xu, Xiaohong Tianjin Key Laboratory of Low Dimensional Materials Physics and Processing Technology School of Science Tianjin University Tianjin300354 China School of Chemistry and Materials Science Key Laboratory of Magnetic Molecules and Magnetic Information Materials Ministry of Education Shanxi Normal University Taiyuan030006 China Research Institute of Materials Science Shanxi Key Laboratory of Advanced Magnetic Materials and Devices Shanxi Normal University Taiyuan030006 China

In strongly correlated transition metal oxide (TMO) systems, the anomalous Hall effect (AHE) can not only reveal the underlying physical mechanism of the coupling between multiple degrees of freedom, but also generate spin current-driven magnetization switching. However, enhancing the AHE in this system remains a significant challenge at present. This work systematically investigates the electronic transport properties of SrIrO3/NiCo2O4 (SIO/NCO) heterostructures, showing that the AHE of SIO/NCO heterostructures is enhanced by an order of magnitude compared to the ferrimagnetic NCO single film. The enhancement of AHE is more significant as the thickness of the SIO sublayer decreases, which is attributed to the fact that large strain exacerbates the interfacial charge transfer. This is demonstrated through the variation of binding energies and concentrations of electronic states in the X-ray photoelectron spectroscopy. Moreover, the AHE in SIO/NCO heterostructures arises from the synergistic effect of the intrinsic mechanism dominated by Berry curvature and the extrinsic mechanism caused by impurity scattering. This finding paves the way for advancing the reliability of TMO-based spintronic devices. (Figure presented.) © Science China Press 2025.

关键词： Degrees of freedom (mechanics)

来源：评论

学校读者我要写书评

暂无评论

Quasilinear dispersion in electronic band structure and high Seebeck coefficient in CuFeS2-based thermoelectric materials

引用

Physical Review materials 2020年第2期4卷 025405-025405页

作者： Hongyao Xie Xianli Su Shiqiang Hao Christopher Wolverton Ctirad Uher Xinfeng Tang Mercouri G. Kanatzidis State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Chemistry Northwestern University Evanston Illinois 60208 USA Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA Department of Physics University of Michigan Ann Arbor Michigan 48109 USA

The earth-abundant natural mineral chalcopyrite CuFeS2 is a potential n-type thermoelectric material because of its large Seebeck coefficient at high carrier concentrations. For a long time, the large Seebeck coefficient of CuFeS2 has been attributed to a large electron effective mass, but the reasons for this and the unusual carrier concentration dependent behavior have rarely been discussed. Here, we systematically investigated the special transport behavior of CuFeS2 and found the classical parabolic band model to be inadequate in explaining it. Our experimental and theoretical studies indicate that there are two flat electronic pockets at the Γ and Z points of the Brillouin zone near the conduction band edge of CuFeS2 that dominate the charge transport. These electronic pockets result from nonparabolic quasilinearly dispersing bands that give rise to a linear wave vector dependent energy (E∼k) and a carrier density dependent effective mass (m*∼m0n1/3). Such a strong carrier concentration dependent carrier effective mass results in the high Seebeck coefficient of CuFeS2 compound under a large carrier density. The work demonstrates that quasilinearly dispersing bands can give strongly enhanced Seebeck coefficient, and could be useful in optimizing the properties of thermoelectric materials.

关键词： Thermoelectric effects

来源：评论

学校读者我要写书评

暂无评论

Taming the Ion-Dipole Interaction via Rational Diluent Selection for Low-Temperature Li-Metal Batteries

引用

Angewandte Chemie 2025年

作者： Zhenglu Zhu Yan Li Jie Ji Xiaoqun Qi Junqing Pan Jiwei Ma Long Qie Yunhui Huang State Key Laboratory of Chemical Resource Engineering College of Chemistry Beijing University of Chemical Technology Beijing 100029 State Key Laboratory of Material Processing and Die & Mold Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 Institute of New Energy for Vehicles School of Materials Science and Engineering Tongji University Shanghai 201804

Developing advanced electrolytes with high Li affinity is crucial for achieving long-cycling lithium metal batteries (LMBs). However, the strong Li + -solvent interactions in conventional electrolytes often induce difficult Li + desolvation especially under low-temperature conditions, resulting in the formation of fragile electrode interfaces involving solvents, and thus dissatisfactory cycling stability of LMBs. Herein, by introducing various diluents into the lithium hexafluorophosphate in 1, 2-dimethoxyethane electrolyte, we reveal that Li + desolvation is influenced by not only the diluent-solvent interaction but also the diluent-anion interaction. Based on these findings, a diluent selection parameter (DSP), which is calculated based on the product of interaction energies of diluent-solvent/diluent-Li + and diluent-anion/diluent-Li + , is proposed for diluent selection. A diluent with a larger DSP is more favorable for promoting Li + desolvation and improving the low-temperature performance of LMBs. With the rationally selected 1, 2-dichloroethane diluent (DSP=3.95), the Li Cu cell enables high Li reversibility (98.5 % after 300 cycles). Li LiFePO 4 cell barely loses capacity at −20 °C for 300 cycles. The Li LiNi 0.8 Co 0.1 Mn 0.1 O 2 cell with the anode-to-cathode capacity ratio of 2.7 retains 87 % capacity retention after 100 cycles. This work provides new insights into taming strong Li-solvent interactions and offers a new paradigm for advanced electrolyte design.

关键词： Electrolyte design Li+ desolvation Li reversibility Interaction energy Selection parameter

来源：评论

学校读者我要写书评

暂无评论

Unveiling the Effect of Solvent Polarity on the Excited state Intramolecular Proton Transfer and Hydrogen Bond Mechanisms of Dhp

SSRN

引用

SSRN 2022年

作者： Song, Yao-Dong Wang, Qian-Ting Chen, Li School of Electronic Electrical Engineering and Physics Fujian University of Technology Fujian Fuzhou350118 China Fujian Provincial Key Laboratory of Advanced Materials Processing and Application China Sanming University Fujian Sanming365004 China Fujian Provincial Engineering Research Center of Die & Mold China Mould Technology Development Base of Fujian Province China Fuzhou Innovation Platform for Novel Materials and Mould Technology China Fujian University of Technology Fujian Fuzhou350118 China

In this present work, using density functional theory and time-dependent density functional theory, the mechanism of excited state intramolecular proton transfer of DHP in ether, 1-butanol, 1-propanol and acetonitrile phases was systematically studied. The optimized geometry includes normal structure and tautomeric structure. The fluorescence spectrum and visible absorption spectrum calculated based on geometric structure agree with the experimental data. The data of bond lengths and bond angles related to hydrogen bonds indicate that hydrogen bonds are strengthened in the S 1 state. Frontier molecular orbital analysis combined with Hirshfeld's method shows that electron densities are distributed in different solvents. Infrared vibration spectra show that the hydrogen bond strength decreases with the increase of solvent polarity. Finally, through the analysis of the potential energy surface, it is found that the excited state intramolecular proton transfer becomes more and more difficult as the polarity of the solvent increases. © 2022, The Authors. All rights reserved.

关键词： Hydrogen bonds

来源：评论

学校读者我要写书评

暂无评论

Cotton-derived oxygen/sulfur co-doped hard carbon as advanced anode material for potassium-ion batteries

引用

Chinese Chemical Letters 2020年第1期31卷 217-222页

作者： Baolin Xu Shihan Qi Fang Li Xiaoxin Peng Jinfeng Cai Jiaojiao Liang Jianmin Ma School of Physics and Electronics Hunan UniversityChangsha 410082China Yiyang Wanjingyuan Electronics Co. Ltd.Yiyang 413000China College of Traffic Engineering Hunan University of TechnologyZhuzhou 412008China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China State Key Lab of Chemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072 China

Hard carbon is regarded as promising anode materials for potassium-ion batteries(KIBs)owing to their low price and easy ***,the limited rate capability still needs to be ***,we demonstrate the fabrication of oxygen/sulfur co-doped hard carbon through a facile hydrolyzationsulfuration process of skimmed *** simultaneous dopants significantly improve potassium ion diffusion *** served as the anode for KIBs,this hydrolyzed hard carbon delivered a high reversible capacity(409 mAh/g at 0.1 A/g),superior rate capability(135 mAh/g at 2 A/g)and excellent cyclability(about 120 mAh/g overt 500 cycles at 2 A/g).This work provides a facile strategy to prepare low-cost doped-hard carbon with superior potassium storage property.

关键词： Carbon Doping Anode Potassium-ion battery Biomass

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：