检索结果-内蒙古大学图书馆

Blocking thermal runaway propagation in large-format sodium-ion battery system through localized energy release

Journal of Energy Chemistry 2025年第5期104卷 514-526页

作者： Yongchun Dang Yongchao Yu Zhenpo Wang Peng Liu Xunli Zhou Yongjie Zhao Peipei Qi Fei Xu Lei Li National Engineering Research Center of Electric Vehicles Beijing Co-Innovation Centre for Electric VehiclesBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Research Center of Do-Fluoride New Energy Technology Co. Ltd.Jiaozuo 454003HenanChina

Cascading thermal runaway(TR)propagation poses a critical safety concern for large-format sodium-ion battery(SIB)systems because of the heightened risks of fires or ***,effectively suppressing TR propagation without introducing unintended side effects remains a significant ***,we demonstrate a localized energy release method to mitigate TR,by reducing the state of charge(SOC)of cells adjacent to the thermally runaway *** discover that as the SOCs decreased from 100%to 25%,the TR trigger temperature decreased significantly,and the maximum temperature decrease from 367 to 229℃.Meanwhile,the volume of gas decreased to one-third of its original value,while the range of explosion limits significantly *** analysis of the morphology of the debris further confirms that the structural damage is greater at higher SOC ***,an Entropy Weight and Technique for Order Preference by Similarity to an Ideal Solution(EW-TOPSIS)method has been established to assess the safety status of SIBs,showing that the TR possibility is nearly linear with the SOCs,and the TR hazard is exponentially related to the ***,when the SOC of cells adjacent to the TR cell is reduced to 25%,TR can be directly blocked without the need for additional cooling or thermal insulation *** study not only advances the understanding of TR behavior in SIBs but also offers a straightforward approach to mitigating the TR risk in SIB systems.

关键词： Sodium-ion battery Thermal runaway Safety assessment Localized energy release

来源：评论

学校读者我要写书评

暂无评论

Microstructure and Texture Evolution of Mg‑14Gd‑0.5Zr Alloy during Rolling and Annealing under Diferent Temperatures

引用

Acta Metallurgica Sinica(English Letters) 2023年第1期36卷 61-76页

作者： Chunxiao Li Hong Yan Rongshi Chen Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

Mg alloys containing high rare earth(RE)elements are hard to be rolled due to their low ductility and high strength at low ***,rolling at high temperatures is necessary for these *** this work,a Mg-14Gd-0.5Zr(wt%)alloy was rolled one pass with 40%reduction at high temperatures over 450°*** efects of rolling temperature on the microstructure and dynamic recrystallization behavior were analyzed in detail by the electron backscattered difraction(EBSD)*** results revealed that the alloy shows good rollability at high temperature due to the activity of nonbasal dislocations and ***,dynamic recrystallization is difcult to take place because of the easy activation of multi-slip system and thus more accumulated strain ***,Gd segregation was observed at the grain boundary and it is inferred that the segregation can partially enhance the dynamic recrystallization *** recrystallized grains with large size took place after short-term inter-pass annealing treatment ranging from 450℃to 500°C,and formed basal *** result suggests that the formation of basal texture during short-term annealing treatment was attributed to the growth of dynamic recrystallized grains caused by weakened Gd segregation.

关键词： Magnesium alloys Hot rolling Annealing Recrystallization Mg-Gd-Zr

来源：评论

学校读者我要写书评

暂无评论

Effect of microalloying on wettability and interface characteristics of Zr-based bulk metallic glasses with W substrate

引用

China Foundry 2024年第4期21卷 352-359页

作者： Zhen Zhang Lin-na Feng Jin-he Wang Zheng-kun Li Hua-meng Fu Hong Li Zheng-wang Zhu Hai-feng Zhang School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Metallurgy Northeastern UniversityShenyang 110004China

The infiltration casting method is widely employed for the preparation of ex-situ composite ***,the production of composite materials using this method must necessitates a comprehensive understanding of the wettability and interface characteristics between the reinforcing phase and the bulk metallic glasses(BMGs).This work optimized the composition of Zr-based BMGs through microalloying methods,resulting in a new set of Zr-based BMGs with excellent glass-forming *** experiments between the Zr-based BMGs melts and W substrates were conducted using the traditional sessile drop method,and the interfaces were characterized utilizing a scanning electron microscope(SEM)equipped with energy dispersive X-ray spectroscopy(EDS).The work demonstrates that the microalloying method substantially enhances the wettability of the Zr-based BMGs ***,the incorporation of Nb element impedes the formation of W-Zr phases,but the introduction of Nb element does not alter the extent of interdiffusion between the constituent elements of the amorphous matrix and W element,indicating that the influence of Nb element on the diffusion of individual elements is minute.

关键词： Zr-based BMGs infiltration casting method wettability interface characteristics W-Zr phases

来源：评论

学校读者我要写书评

暂无评论

Strain and Magnetic Field Changes in Vibration of Devices Attached Iron Alloys with Large Magnetostriction

引用

Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2024年第5期110卷 404-413页

作者： Chiba, Masaki Misawa, Kensuke Tanimoto, Hisanori Kumagai, Masayoshi Sato, Shigeo Kawamata, Toru Suzuki, Shigeru Institute of Multidisciplinary Research for Advanced Materials Tohoku University Japan Advanced Technology Research Laboratories Nippon Steel Corporation Japan Faculty of Pure and Applied Sciences University of Tsukuba Japan Faculty of Engineering Tokyo City University Japan Graduate School of Science and Engineering Ibaraki University Japan Institute of Material Research Tohoku University Japan Micro System Integration Center Tohoku University Japan

To understand the mechanism of vibration energy harvesting using magnetostrictive Fe-Ga alloys, the dynamic strains at different locations of a U-shaped device during vibration were simulated. In the simulations, the previous results for location-dependent strain in the vibration experiments were fitted with trigonometric functions. The results show that the amplitude and phase of the strain vary with location, and that the electromagnetic force is generated at different locations. Since magnetic induction is thought to occur due to an external magnetic field, the magnetic domain structure near the cube orientation of Fe-Ga alloy single crystals was observed using a Kerr effect microscope. As a result, Bloch magnetic domain structures with different contrasts of brightness and darkness were observed depending on the applied magnetic field. It was shown that striped magnetic domains were dominant when the applied magnetic field was small, while lancet magnetic domains oriented to the magnetic field appeared with transverse straight supplementary domains as a magnetic domain under a saturated magnetic field. The domain patterns in one direction magnetic fields were not necessarily the same as those observed in the opposite direction. This indicates that Fe-Ga alloy single crystals are used as a core for vibrational energy harvesting. Also, the motion of magnetic walls is thought to play an important role in the vibrational properties of the material, and inhomogeneous elastic strain associated with magnetic domains evolves microscopically in single crystals. © 2024 The Iron and Steel Institute of Japan. This is an open access article under the terms of the Creative Commons Attribution-NonCommercialNoDerivatives license (https://***/licenses/by-nc-nd/4.0/).

关键词： Iron alloys

来源：评论

学校读者我要写书评

暂无评论

Early planetary processes and light elements in iron-dominated cores

引用

Acta Geochimica 2022年第4期41卷 625-649页

作者： Chaojia Lv Jin Liu Center for High Pressure Science and Technology Advanced Research Beijing100094China CAS Center for Excellence in Deep Earth Science Guangzhou510640China

This paper discusses the latest research on the accretion and differentiation of terrestrial planets and multidisciplinary constraints on light elements in irondominated metallic *** classic four-stage model of terrestrial planet formation advocates slow and local ***,the pebble accretion model suggests fast accretion for planets,while the Grand Tack model provides heterogeneous accretion *** planets and small interstellar bodies may have experienced at least some degree of partial melting due to the three primary energy sources(i.e.,the decay of short-lived radioactive nuclides,the kinetic energy delivered by impacts,and the conversion of gravitational potential energy).Together with metal-silicate separation mechanisms,the magma ocean theory depicts the pattern of core formation in terrestrial *** hypotheses have been proposed to explain the concentration of siderophile elements in the mantle,including the single-stage,continuous,and multistage core formation models,and the lateveneer *** light elements have been postulated in the core to account for Earth’s outer core density deficit.A plethora of constraints on the species and concentration of light elements have been put forward from the perspectives of cosmochemical and geochemical fingerprints,geophysical observations,mineral physics,numerical modeling,and theoretical *** and O may be the two leading candidates for Earth’s outer core light elements;however,it still remains an open question.S is another potential light element in Earth’s core,most likely with less than 2 wt%.Other light elements including H and C,may not exceed1 wt%in the ***,the accretion and differentiation history would provide some clues to light elements in other terrestrial planetary *** principle,a larger heliocentric distance corresponds to accretion from more oxidized materials,leading to a higher S concentration in the Martian *** the contrary,Me

关键词： Terrestrial accretion Early processes Coremantle differentiation Core composition

来源：评论

学校读者我要写书评

暂无评论

Tailoring the Texture and Mechanical Anisotropy of Multi-cross Rolled Mg-Zn-Gd Alloy by Annealing

引用

Acta Metallurgica Sinica(English Letters) 2023年第2期36卷 251-265页

作者： Xihai Li Hong Yan Rongshi Chen School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao266590China

The unidirectional rolled Mg-Zn-Gd sheet usually exhibited non-basal texture with two peaks whose tilting angle were about 42°from normal direction to transverse direction(TD),which would cause the mechanical *** this study,multi-cross rolling followed by annealing was used to tailor the texture and mechanical anisotropy for Mg-Zn-Gd *** increasing annealing temperature,the rolled basal texture with two peaks gradually transformed into the circle texture with *** order to figure out different texture components evolution during annealing,the basal texture,R-texture and T-texture component were defined and *** results showed that the change of R-texture and T-texture component was asynchronous with increasing annealing temperature from 250 to 400℃.The tilting angle of R-texture component increased slightly,while the tilting angle of T-texture component increased obviously,and this phenomenon was attributed to the preferential nucleation at grain nucleation stage rather than preferential grain *** yield strength along TD was more sensitive to annealing temperature compared with that along rolling direction(RD),resulting in different descending slopes and yield strength anisotropy with increasing annealing *** at 300℃was the best annealing temperature due to low yield strength anisotropy,moderate strength and good elongation among these annealing *** Schmid factor for basal slip indicated that the activity of basal slip along RD increased slightly,while that along TD increased obviously with increasing annealing temperature from 250 to 400℃,which should be caused by the asynchronous change of R-texture component and T-texture component,consequently resulting in the transformation from isotropic yield strength to anisotropic yield strength.

关键词： Mg-Zn-Gd alloy Annealing Texture Yield strength Electron back-scattering diffraction(EBSD)

来源：评论

学校读者我要写书评

暂无评论

In situ constructing lamella-heterostructured nanoporous CoFe/CoFe2O4 and CeO2-x as bifunctional electrocatalyst for high-current-density water splitting

引用

稀有金属（英文版） 2025年第2期44卷 1053-1066页

作者： Yue Deng Jin Wang Shao-Fei Zhang Zhi-Jia Zhang Jin-Feng Sun Tian-Tian Li Jian-Li Kang Hao Liu Shi Bai Hebei Key Laboratory of Flexible Functional Materials/Hebei Key Laboratory of Material Near-Net Forming Technology School of Materials Science and EngineeringHebei University of Science and TechnologyShijiazhuang 050018China School of Materials Science and Engineering Institute of Quantum Materials and DevicesState Key Laboratory of Separation Membrane and Membrane ProcessesTiangong UniversityTianjin 300387China School of Materials Science and Engineering Tianjin UniversityTianjin 300380China Materials Science and Technology Research Department Ji Hua LaboratoryFoshan 528000China Advanced Laser Processing Research Team RIKEN Center for Advanced PhotonicsSaitama 351-0198Japan

The stability and electrocatalytic efficiency of transition metal oxides for water splitting is determined by geometric and electronic structure,especially under high current ***,a newly designed lamella-heterostructured nanoporous CoFe/CoFe2O4 and CeO2-x,in situ grown on nickel foam(NF),holds great promise as a high-efficient bifunctional electrocatalyst(named R-CoFe/Ce/NF)for water *** characterization verifies surface reconstruction from CoFe alloy/oxide to highly active CoFeOOH during in situ electrochemical *** virtues of three-dimensional nanoporous architecture and abundant electroactive CoFeOOH/CeO2-x heterostructure interfaces,the R-CoFe/Ce/NF electrode achieves low overpotentials for oxygen evolution(η10=227 mV;η500=450 mV)and hydrogen evolution(η10=35 mV;η408=560 mV)reactions with high nor-malized electrochemical active surface areas,***,the alkaline full water splitting electrolyzer of R-CoFe/Ce/NF‖R-CoFe/Ce/NF achieves a current den-sity of 50 mA·cm-2 only at 1.75 V;the decline of activity is satisfactory after 100-h durability test at 300 mA·*** functional theory also demonstrates that the elec-tron can transfer from CeO2-x by virtue of O atom to CoFeOOH at CoFeOOH/CeO2-x heterointerfaces and enhancing the adsorption of reactant,thus optimizing electronic structure and Gibbs free energies for the improvement of the activity for water splitting.

关键词： Lamellar nanoporous structure Electronic structure regulation High current density Theoretical calculation Overall water splitting

来源：评论

学校读者我要写书评

暂无评论

Tuning Stark effect by defect engineering on black titanium dioxide mesoporous spheres for enhanced hydrogen evolution

引用

Chinese Chemical Letters 2024年第11期35卷 254-259页

作者： Bingke Zhang Dongbo Wang Jiamu Cao Wen He Gang Liu Donghao Liu Chenchen Zhao Jingwen Pan Sihang Liu Weifeng Zhang Xuan Fang Liancheng Zhao Jinzhong Wang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Astronautics Harbin Institute of TechnologyHarbin 150001China Center for High Pressure Science and Technology Advanced Research Shanghai 201203China Qingdao University of Science and Technology Qingdao 266061China State Key Laboratory of High Power Semiconductor Lasers School of PhysicsChangchun University of Science and TechnologyChangchun 130022China

Defects can strongly affect the lattice,strain,and electronic structures of nanomaterials photocatalysts,like a double-edged sword of both positive significance and negative influence on photocatalytic *** date,most studies into defects only partially elucidated their beneficial or detrimental roles in ***,a quantitative understanding of the photocatalytic performances modulated by defect concentration still needs to be ***,a series of TiO_(2-X)mesoporous spheres(MS)with different oxygen vacancy concentrations for photocatalytic applications were prepared by hightemperature chemical *** link between oxygen vacancy concentration and photocatalytic performance was successfully *** localization of carriers dominated by the Stark effect is first enhanced and then weakened with increasing oxygen vacancy concentration,which is a crucial factor in explaining the double-edged sword role of defect concentration in *** the reduction temperature rises to 300℃,carrier localization dominated by the quantum-confined Stark effect maximizes the separation ability of photo generated electron hole pairs,thus exhibiting the best catalytic performance for photocatalytic hydrogen production and the degradation of organic pollutants,as demonstrated by a hydrogen evolution rate of 523.7μmol g^(-1)h^(-1)and a ninefold higher RhB photodegradation rate compared to TiO_(2)*** work offers excellent flexibility for precisely constructing high-performance photocatalysts by understanding vacancy engineering.

关键词： Photocatalysis Defect Carrier localization TiO_(2-X) Stark effect

来源：评论

学校读者我要写书评

暂无评论

Molecular dynamics simulations on the interactions between nucleic acids and a phospholipid bilayer

引用

Chinese Physics B 2024年第2期33卷 512-521页

作者：徐耀黄舒伟丁泓铭马余强 National Laboratory of Solid State Microstructures and Department of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Center for Soft Condensed Matter Physics and Interdisciplinary Research School of Physical Science and TechnologySoochow UniversitySuzhou 215006China

Recently,lipid nanoparticles(LNPs)have been extensively investigated as non-viral carriers of nucleic acid vaccines due to their high transport efficiency,safety,and straightforward production and ***,the molecular mechanism underlying the interactions between nucleic acids and phospholipid bilayers within LNPs remains *** this study,we employed the all-atom molecular dynamics simulation to investigate the interactions between single-stranded nucleic acids and a phospholipid *** findings revealed that hydrophilic bases,specifically G in single-stranded RNA(ssRNA)and single-stranded DNA(ssDNA),displayed a higher propensity to form hydrogen bonds with phospholipid head ***,ssRNA exhibited stronger binding energy than ***,divalent ions,particularly Ca2+,facilitated the binding of ssRNA to phospholipids due to their higher binding energy and lower dissociation rate from ***,our study provides valuable insights into the molecular mechanisms underlying nucleic acidphospholipid interactions,with potential implications for the nucleic acids in biotherapies,particularly in the context of lipid carriers.

关键词： RNA DNA lipid bilayer molecular dynamics interface interaction divalent cation

来源：评论

学校读者我要写书评

暂无评论

CHART:Intelligent Crime Hotspot Detection and Real-Time Tracking Using Machine Learning

引用

Computers, Materials & Continua 2024年第12期81卷 4171-4194页

作者： Rashid Ahmad Asif Nawaz Ghulam Mustafa Tariq Ali Mehdi Tlija Mohammed AEl-Meligy Zohair Ahmed University Institute of Information Technology PMAS Arid Agriculture UniversityRawalpindi46000Pakistan Industrial Engineering Department College of EngineeringKing Saud UniversityRiyadh11421Saudi Arabia Jadara University Research Center Jadara UniversityIrbid21110Jordan Applied Science Research Center Applied Science Private UniversityAmman11931Jordan School of Computer Science and Engineering Central South UniversityChangsha410083China

Crime hotspot detection is essential for law enforcement agencies to allocate resources effectively,predict potential criminal activities,and ensure public *** methods of crime analysis often rely on manual,time-consuming processes that may overlook intricate patterns and correlations within the *** some existing machine learning models have improved the efficiency and accuracy of crime prediction,they often face limitations such as overfitting,imbalanced datasets,and inadequate handling of spatiotemporal *** research proposes an advanced machine learning framework,CHART(Crime Hotspot Analysis and Real-time Tracking),designed to overcome these *** proposed methodology begins with comprehensive data collection from the police *** dataset includes detailed attributes such as crime type,location,time and demographic *** key steps in the proposed framework include:Data Preprocessing,Feature Engineering that leveraging domain-specific knowledge to extract and transform relevant *** Map Generation that employs Kernel Density Estimation(KDE)to create visual representations of crime density,highlighting hotspots through smooth data point distributions and Hotspot Detection based on Random Forest-based to predict crime likelihood in various *** Experimental evaluation demonstrated that CHART shows superior performance over benchmark methods,significantly improving crime detection accuracy by getting 95.24%for crime detection-I(CD-I),96.12%for crime detection-II(CD-II)and 94.68%for crime detection-III(CD-III),*** designing the application with integrating sophisticated preprocessing techniques,balanced data representation,and advanced feature engineering,the proposed model provides a reliable and practical tool for real-world crime *** of crime hotspots enables law enforcement agencies to strategize effectively,focusing resources on high-risk areas and thereby enhanc

关键词： Crime hotspot heat map kernel density estimation(KDE) support vector machine(SVM)

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：