检索结果-内蒙古大学图书馆

Ultrahigh-power electrochemical double-layer capacitors based on structurally integrated 3D carbon tube arrays

Nano Research 2023年第11期16卷 12849-12854页

作者： Fangming Han Guowen Meng Dou Lin Gan Chen Shiping Zhang Ou Qian Xiaoguang Zhu Bingqing Wei Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsHefei Institute of Physical ScienceChinese Academy of SciencesHefei 230031China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Mechanical Engineering University of DelawareNewarkDE 19716USA

The rational design of electrodes is the key to achieving ultrahigh-power performance in electrochemical energy storage ***,we have constructed well-organized and integrated three-dimensional(3D)carbon tube(CT)grids(3D-CTGs)using a 3D porous anodic aluminum oxide template-assisted method as electrodes of electrical double-layer capacitors(EDLCs),showing excellent frequency response *** unique design warrants fast ion migration channels,excellent electronic conductivity,and good structural *** study achieved one of the highest carbon-based ultrahigh-power EDLCs with the 3D-CTG electrodes,resulting in ultrahigh power of 437 and 1708 W·cm−3 with aqueous and organic electrolytes,*** constructed with these electrodes would have important application prospects in the ultrahigh-power *** rational design and fabrication of the 3D-CTGs electrodes have demonstrated their capability to build capacitors with ultrahighpower performance and open up new possibilities for applications requiring high-power output.

关键词： ultrahigh-power double-layer capacitor structurally integrated three-dimensional(3D)carbon tube smooth ion migration channels

来源：评论

学校读者我要写书评

暂无评论

Atomically precise M-N-C electrocatalysts for oxygen reduction:Effects of inter-site distance,metal-metal interaction,coordination environment,and spin states

引用

Journal of Energy Chemistry 2025年第2期101卷 132-155,I0004页

作者： Junfeng Huang Saira Ajmal Anuj Kumar Jianwen Guo Mohammed Mujahid Alam Abdullah G.Al-Sehemi Ghulam Yasin School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina Nano-Technology Research Laboratory Department of ChemistryGLA UniversityMathuraUttar Pradesh 281406India Department of Chemistry College of ScienceKing Khalid UniversityAbha 61413Saudi Arabia School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China State Key Laboratory of Chemical Resource Engineering College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Inspired by molecular catalysts,researchers developed atomically precise nitrogen-coordinated single or dual metal sites imbedded in graphitized carbon(M-N-C)to fully utilize metallic sites for *** catalysts performed remarkably well in the electrocatalytic oxygen reduction reaction(ORR)due to their distinct coordination and electrical structures,Nonetheless,their maximum efficacy in practical applications has yet to be *** agenda identifies tailoring the coordination environment,spin states,intersite distance,and metal-metal interaction as innovative approaches to regulate the ORR performance of these ***,it is necessary to undertake a precise assessment of these methodologies and the knowledge obtained to be implemented in the design of future M-N-C catalysts for ***,this review aims to analyze recent progress in M-N-C ORR catalysts,emphasizing their innovative engineering with aspects such as alteration in intersite distance,metal-metal interaction,coordination environment,and spin ***,we critically discuss how to logically monitor the atomic structure,local coordination,spin,and electronic states of M-N-C catalysts to modulate their ORR *** have also highlighted the challenges associated with M-N-C catalysts and proposed suggestions for their future design and fabrication.

关键词： Electrocatalysis M-N-C electrocatalysts ORR Activity descriptors Spin states

来源：评论

学校读者我要写书评

暂无评论

Influence of sintering time on microstructure and properties of hot oscillatory pressing sintered W–Cu refractory alloys

引用

Tungsten 2024年第2期6卷 323-332页

作者： Zi-Qian Wu Wei Zhao Ka Gao Shi-Hao Du Qing-Quan Kong De-Jian Sun Yang Gao School of Materials Science and Engineering Zhengzhou University of AeronauticsZhengzhou 450015China School of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of General Medicine Changhai HospitalShanghai 200000China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and TechnologyWuhan 430081China Sichuan Province Engineering Technology Research Center of Powder Metallurgy Chengdu UniversityChengdu 610106China

W–Cu refractory alloys are widely used in aerospace,aviation,electronics,power,and other fi ***,because of its large melting point diff erence between alloy elements,the conventional powder metallurgy method required a long time of high temperature sintering is very likely to cause low density and abnormal grain size ***,90W-10Cu refractory alloys were successfully prepared by hot oscillatory pressing(HOP)under diff erent sintering time in this *** the infl uence of sintering time on the microstructure,grain size,density,Vickers hardness,room-tensile property,and electrical conductivity of the W–Cu refractory alloy was systematically *** results showed that during the short sintering time(30–90 min),the density,Vickers hardness,tensile strength,and electrical conductivity of the W–Cu refractory alloy increased signifi cantly to 98.7%,163.29 HV 30,507.3 MPa,and 14.2%International Annealed Copper Standard with the sintering time increasing,respectively,while its grain size showed no obvious *** the sintering time further increased to 120 min,the density was basically consistent with the sintering time of 90 ***,the prolonged high temperature sintering resulted in the grain growth of the samples,which caused the deterioration of the Vickers hardness,room-tensile strength,and conductivity properties of the W–Cu refractory *** the same sintering time,the density,Vickers hardness,and electrical conductivity of the HOP sintered W–Cu refractory alloy were signifi cantly higher than those of the HP sintered *** was indicated that high density,fi ne-grain,and excellent properties W–Cu refractory alloys could be prepared by hot oscillatory pressing under appropriate sintering time.

关键词： W–Cu refractory alloy Hot oscillatory pressing Sintering time Microstructure Property

来源：评论

学校读者我要写书评

暂无评论

Recent advances of magnesium hydride as an energy storage material

引用

Journal of materials science & Technology 2023年第18期149卷 99-111页

作者： Mengchen Song Liuting Zhang Fuying Wu Haoyu Zhang Hu Zhao Lixin Chen Hong Li School of Energy and Power Instrumental Analysis CenterJiangsu University of Science and TechnologyZhenjiang 212003China School of Mechanical and Aerospace Engineering Nanyang Technological University639798Singapore State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

Energy storage is the key for large-scale application of renewable energy,however,massive efficient en-ergy storage is very *** hydride(MgH_(2))offers a wide range of potential applications as an energy carrier due to its advantages of low cost,abundant supplies,and high energy storage ***,the practical application of MgH_(2) for energy storage is still impeded by its sluggish kinetics,poor cycling stability,***,we provide an overview of recent advances of MgH_(2) for enhancing the hydrogen storage,lithium-ion storage,and heat storage *** hydrogen storage,a particular emphasis was put on altering the kinetics and thermodynamics of MgH_(2) via catalyzing,alloying,nano-sizing,and *** to MgH_(2) as a battery anode material mainly focus on the effect of additives,electrolytes,and structure *** heat storage apparatus was proposed based on MgH_(2) and coupled with other materials or systems to improve the heat storage and economic ***,prospects of MgH_(2) in these fields are *** review would stimulate more insightful and pioneering research for the design and preparation of MgH_(2) with excellent energy storage performances.

关键词： Magnesium hydride Energy storage Hydrogen storage Li-ion battery Heat storage

来源：评论

学校读者我要写书评

暂无评论

Air-condition process for scalable fabrication of CdS/ZnS 1D/2D heterojunctions toward efficient and stable photocatalytic hydrogen production

引用

Carbon Energy 2023年第7期5卷 1-14页

作者： Dongdong Zhang Jie Teng Hongli Yang Zhi Fang Kai Song Lin Wang Huilin Hou Xianlu Lu Chris RBowen Weiyou Yang College of Materials Science and Engineering Hunan UniversityChangshaPeople's Republic of China Institute of Micro/Nano Materials and Devices Ningbo University of TechnologyNingboZhejiangPeople's Republic of China Department of Mechanical Engineering University of BathBathUK

We report the scalable fabrication of CdS/ZnS 1D/2D heterojunctions under ambient air conditions(i.e.,room temperature and atmospheric pressure)in which ZnS nanoparticles are anchored on the surface of CdS *** as-formed heterojunctions exhibit a significantly enhanced photocatalytic H_(2) evolution rate of 14.02 mmol h^(-1) g^(-1) when irradiated with visible light,which is~10 and 85 times higher than those of pristine CdS nanosheets and CdS nanoparticles,respectively,and superior to most of the CdS-based photocatalysts reported to ***,they provide robust photocatalytic performance with demonstratable stability over 58 h,indicating their potential for practical *** formation of 1D/2D heterojunctions not only provides improved exposed active sites that respond to illumination but also provides a rapid pathway to generate photogenerated carriers for efficient separation and transfer through the matrix of single-crystalline CdS *** addition,first-principles simulations demonstrate that the existence of rich Zn vacancies increases the energy level of the ZnS valence band maximum to construct type-II and Z-scheme mixed heterojunctions,which plays a critical role in suppressing the recombination of carriers with limited photocorrosion of CdS to enhance photocatalytic behavior.

关键词： air condition CdS heterojunctions photocatalytic hydrogen production ZnS

来源：评论

学校读者我要写书评

暂无评论

Acoustofluidics for simultaneous nanopartide-based drug loading and exosome encapsulation

引用

Microsystems & Nanoengineering 2022年第2期8卷 149-159页

作者： Zeyu Wang Joseph Rich Nanjing Hao Yuyang Gu Chuyi Chen Shujie Yang Peiran Zhang Tony Jun Huang Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNC 27708USA Department of Biomedical Engineering Duke UniversityDurhamNC 27708USA

Nanocarrier and exosome encapsulation has been found to significantly increase the efficacy of targeted drug delivery while also minimizing unwanted side ***,the development of exosome-encapsulated drug nanocarriers is limited by low drug loading efficiencies and/or complex,time-consuming drug loading ***,we have developed an acoustofluidic device that simultaneously performs both drug loading and exosome *** synergistically leveraging the acoustic radiation force,acoustic microstreaming,and shear stresses in a rotating droplet,the concentration,and fusion of exosomes,drugs,and porous silica nanoparticles is *** final product consists of drug-loaded silica nanocarriers that are encased within an exosomal *** drug loading efficiency is significantly improved,with nearly 30%of the free drug(e.g.,doxorubicin)molecules loaded into the ***,this acoustofluidic drug loading system circumvents the need for complex chemical modification,allowing drug loading and encapsulation to be completed within a matter of *** exosome-encapsulated nanocarriers exhibit excellent efficiency in intracellular transport and are capable of significantly inhibiting tumor cell *** utilizing physical forces to rapidly generate hybrid nanocarriers,this acoustofluidic drug loading platform wields the potential to significantly impact innovation in both drug delivery research and applications.

关键词： exosome loading simultaneous

来源：评论

学校读者我要写书评

暂无评论

Slip-band-driven dynamic recrystallization mediated strain hardening in HfNbTaTiZr refractory high entropy alloy

引用

材料科学技术（英文版） 2025年第6期209卷 240-250页

作者： Long Xu Yuefei Jia Yueli Ma Yandong Jia Shiwei Wu Chao Chen Hongyu Ding Jieren Guan Xinfeng Kan Rui Wang Gang Wang Marine Equipment and Technology Institute Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Materials Shanghai UniversityShanghai 200444China Department of Mechanical Engineering National University of SingaporeSingapore 117575Singapore

Refractory high-entropy alloys(RHEAs)exhibit outstanding strength at room temperature,but their high-temperature applications are hindered by severe ***,we report slip-band-driven dy-namic recrystallization to enhance the high-temperature strain hardening of HfNbTaTiZr *** intro-ducing partial lattice defects through hot forging,we increase the nucleation sites for dynamic recrys-tallization during subsequent thermomechanical deformation,thus suppressing the strain-softening *** reveal that the high-temperature deformation is governed by the formation of heterogeneous bimodal grains along slip bands,which effectively constrain dislocation motion and improve strength,while microbands prevent premature *** fracture mode also changes from ductile to mixed to cleavage-dominated with increasing *** results demonstrate a simple and effective method for overcoming high-temperature strain-softening for BCC high entropy alloys.

关键词： Refractory high-entropy alloy High-temperature strain-softening Slip band Recrystallization

来源：评论

学校读者我要写书评

暂无评论

Ultra-high strength GNP/2024Al composite via thermomechanical treatment

引用

Journal of materials science & Technology 2022年第13期108卷 164-172页

作者： Zhong Zheng Xuexi Zhang Mingfang Qian Jianchao Li Muhammad Imran Lin Geng School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Mechanical Engineering Department University of Engineering&Technology TaxilaTaxila 47050Pakistan

The 5.0 vol.%GNP/2024Al composites were prepared by accumulated shear deformation combined with heat treatment,*** thermomechanical treatment(TMT).The results showed that homogeneous distributed GNPs that aligned along the plastic deformation direction were obtained by six-pass drawing in the solution heat treatment *** introducing of high-density dislocations in Al matrix by multiple drawing resulted in enhanced nucleation of precipitates and subsequent uniform growth during ***,ultra-strength GNP/2024Al composites,with yield and ultimate tensile strength 482 and571 MPa,respectively,were *** high strength was attributed to homogeneous dispersion of undamaged GNPs,fine and dispersed precipitations and work-hardening *** work demonstrated that TMT could act as a feasible strategy for preparing high-performance GNP/Al composites.

关键词： Metal-matrix composites(MMCs) Graphene nano-platelets(GNPs) Interface Ultra-strength composites Thermomechanical treatment(TMT)

来源：评论

学校读者我要写书评

暂无评论

Effects of heat treatment on the corrosion behavior and mechanical properties of biodegradable Mg alloys

引用

Journal of Magnesium and Alloys 2022年第7期10卷 1737-1785页

作者： Meysam Mohammadi Zerankeshi Reza Alizadeh Ehsan Gerashi Mohammad Asadollahi Terence G.Langdon Department of Materials Science and Engineering Sharif University of TechnologyTehranIran Materials Research Group Department of Mechanical EngineeringUniversity of SouthamptonSouthampton SO171BJUnited Kingdom

Biodegradable magnesium(Mg)alloys exhibit great potential for use as temporary structures in tissue engineering *** degradable implants require no secondary surgery for their *** addition,their comparable mechanical properties with the human bone,together with excellent biocompatibility,make them a suitable candidate for fracture ***,some challenges *** degradation of the Mg-based alloys in physiological environments leads to a loss of the mechanical support that is needed for complete tissue healing and also to the accumulation of hydrogen gas bubbles at the interface of the implant and *** different methods used to improve the performance of the biodegradable Mg alloys to address these challenges,it appears that heat treatment is the most effective way to modify the microstructure and thus the corrosion behavior and mechanical properties without changing the composition or shape of the alloys.A desirable combination of corrosion and mechanical properties can be obtained through a precise control of the heat treatment *** this report,the effects of different heat treatments(T4 and T6)on the microstructure,corrosion behavior,and mechanical properties of some of the most important heat-treatable biodegradable Mg alloys(Mg-Zn,Mg-Gd,Mg-Y,Mg-Nd,Mg-Al and Mg-Ag)are examined as well as new perspectives to enhance their clinical implementation.

关键词： Biodegradable implants Corrosion rate Heat treatment mechanical properties Mg alloys

来源：评论

学校读者我要写书评

暂无评论

Pitting corrosion behavior and corrosion protection performance of cold sprayed double layered noble barrier coating on magnesium-based alloy in chloride containing solutions

引用

Journal of Magnesium and Alloys 2023年第9期11卷 3099-3119页

作者： M.Daroonparvar A.Helmer A.M.Ralls M.U.Farooq Khan A.K.Kasar R.K.Gupta M.Misra S.Shao P.L.Menezes N.Shamsaei National Center for Additive Manufacturing Excellence Auburn UniversityAuburnAL 36849USA Department of Mechanical Engineering Auburn UniversityAuburnAL 36849USA Department of Materials Science and Engineering College of EngineeringNorth Carolina State University911 Partners WayRaleighNC 27695USA Department of Mechanical Engineering University of Nevada RenoRenoNV 89501USA Department of Nuclear Engineering and Radiological Sciences University of MichiganAnn ArborMI 48105 USA Department of Chemical and Materials Engineering University of Nevada RenoNV 89501USA

Nitrogen processed, cold sprayed commercially pure(CP)-Al coatings on Mg-based alloys mostly lack acceptable hardness, wear resistance and most importantly are highly susceptible to localized corrosion in chloride containing solutions. In this research, commercially pure α-Ti top coating having good pitting potential(~1293 mV_(SCE)), high microhardness(HV_(0.025): 263.03) and low wear rate was applied on a CP-Al coated Mg-based alloy using high pressure cold spray technology. Potentiodynamic polarization(PDP) curves indicated that the probability of transition from metastable pits to the stable pits for cold spayed(CS) Al coating is considerably higher compared to that with the CS Ti top coating(for Ti/Al/Mg system). In addition, CS Ti top coating was in the passivation region in most pH ranges even after 48 h immersion in 3.5 wt% NaCl solution. The stored energy in the CS Ti top coating(as a passive metal) was presumed to be responsible for the easy passivation. Immersion tests indicated no obvious pits formation on the intact CS Ti top coating surface and revealed effective corrosion protection performance of the CS double layered noble barrier coatings on Mg alloys in 3.5 wt% NaCl solution even after 264 h.

关键词： Ti coating Mg alloys Localized corrosion Passivity Dislocation density Crystallite size

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：