检索结果-内蒙古大学图书馆

High-energy-density lithium manganese iron phosphate for lithium-ion batteries:Progresses,challenges,and prospects

Journal of Energy Chemistry 2025年第1期100卷 1-17页

作者： Bokun Zhang Xiaoyun Wang Shuai Wang Yan Li Libo Chen Handong Jiao Zhijing Yu Jiguo Tu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic University Hong Kong 9977China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

The soaring demand for smart portable electronics and electric vehicles is propelling the advancements in high-energy–density lithium-ion *** manganese iron phosphate(LiMn_(x)Fe_(1-x)PO_(4))has garnered significant attention as a promising positive electrode material for lithium-ion batteries due to its advantages of low cost,high safety,long cycle life,high voltage,good high-temperature performance,and high energy *** LiMn_(x)Fe_(1-x)PO_(4)has made significant breakthroughs in the past few decades,there are still facing great challenges in poor electronic conductivity and Li-ion diffusion,manganese dissolution affecting battery cycling performance,as well as low tap *** review systematically summarizes the reaction mechanisms,various synthesis methods,and electrochemical properties of LiMn_(x)Fe_(1-x)PO_(4)to analyze reaction processes accurately and guide material ***,the main challenges currently faced are concluded,and the corresponding various modification strategies are discussed to enhance the reaction kinetics and electrochemical performance of LiMn_(x)Fe_(1-x)PO_(4),including multi-scale particle regulation,heteroatom doping,surface coating,as well as microscopic morphology ***,in view of the current research challenges faced by intrinsic reaction processes,kinetics,and energy storage applications,the promising research directions are *** importantly,it is expected to provide key insights into the development of high-performance and stable LiMn_(x)Fe_(1-x)PO_(4)materials,to achieve practical energy storage requirements.

关键词： Lithiummanganese iron phosphate High energydensity Lithium-ionbatteries Reactionmechanism Tap density

来源：评论

学校读者我要写书评

暂无评论

HfC–HfO_(2) modified high/superhigh temperature thermal protection coating for superior hot corrosion resistance and antioxidation performance

引用

Journal of advanced Ceramics 2025年第1期14卷 177-191页

作者： Zhiyun Ye Shuqi Wang Shuang Yu Xinrui Zhao Yongchun Zou Guoliang Chen Lei Wen Lina Zhao Guangxi Zhang Yaming Wang Jiahu Ouyang Dechang Jia Yu Zhou State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001China Institute for Advanced Ceramics Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China National Center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China Xi’an Aerospace Composites Research Institute Academy of Aerospace Propulsion TechnologyXi’an 710025China

With advances in the thrust-weight ratio,the service temperature of gas turbine engines even exceeds 1500℃,which is urgent for the development of high/superhigh-temperature thermal protection systems(TPSs)for long-term *** alloys are increasingly viewed as promising structural materials for high-temperature applications because of their superior high-temperature mechanical strength,but the“pest”catastrophic oxidation greatly restricts their further *** this study,a HfC–HfO_(2)-modified silicide coating was prepared via an innovative method of halide-activated pack cementation(HAPC)combined with liquid-plasma-assisted particle deposition and sintering of niobium alloys,resulting in a composite coating with excellent hot corrosion resistance and high-temperature oxidation *** modified multilayer coating is characterized by the synergistic combination of a dense NbSi_(2) inner layer and a HfC–HfO_(2) porous outer layer,resulting in a significant improvement in high-temperature performance compared with that of the single NbSi_(2) *** corrosion gain of the composite coating is only 13.94 mg·cm^(−2) after a corrosion time of 200 h at 900℃,and an intact oxide scale surface is observed after oxidation at 1500℃for 500 *** improvement is attributed to the formation of a robust Hf-rich skeleton provided by the deposited HfC–HfO_(2) layer,which can accelerate the formation of a highly stable corroded layer/oxide *** addition,multiple stress release mechanisms of the composite coating at high temperatures also provide substantial contributions to long-term *** these merits make HfC–HfO_(2)-modified composite coatings on niobium alloys competitive for the development of high/superhigh-temperature thermal protection systems for long-term service.

关键词： thermal protection coating niobium alloys hot corrosion resistance high-temperature oxidation resistance stress release mechanism

来源：评论

学校读者我要写书评

暂无评论

Corrosion and friction characteristics of microarc oxidation coating on Zr-4 alloy

引用

Ceramics International 2025年第12期51卷 15232-15241页

作者： Wang, Shuqi Jin, Rui Cui, Yi Ye, Zhiyun Chen, Guoliang Jin, Zhao Zou, Yongchun Xing, Yaru Wang, Yaming Ouyang, Jiahu Jia, Dechang Zhou, Yu Institute for Advanced Ceramics Harbin Institute of Technology Harbin150080 China Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology Harbin Institute of Technology Harbin150001 China State Key Laboratory of Precision Welding & Joining of Materials and Structures China The 18th Institute China Academy of Launch Vehicle Technology Beijing100176 China

To improve the anti-wear and anti-corrosion of core structural materials of nuclear reactors, a relatively dense ceramic coating is fabricated on the Zr-4 alloy surface by microarc oxidation (MAO). Results show that compared with the substrate, the corrosion potential (−0.212V) of MAO coating in the simulated corrosion solution of a nuclear reactor (0.1 mol/L LiOH) exhibits a positive shift, and the corrosion current density (7.50 × 10−11 A∙cm−2) decreases by four orders of magnitude. During the long-term immersion process of the coated samples, the impedance modulus value still remains above 107 Ω cm2, indicating long-term corrosion protection. Moreover, under the GCr15-dry sliding condition, the friction coefficient of MAO coatings is high under various loads and is mainly attributed to abrasive wear. Under the wet lubrication sliding condition, the friction coefficient is low and stable at 0.35, with a good anti-friction effect. To summarize that, the MAO coating can provide sufficient long-term anti-corrosion and anti-wear protection for zirconium-based alloys, showing great potential in nuclear industry fields such as nuclear reactor cladding. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Zirconium alloys

来源：评论

学校读者我要写书评

暂无评论

The Woven Fabric Sensor and the Intelligent Glove Based on Ecoflex/Carbon Composite Ink

FlexTech

引用

FlexTech 2025年第1期1卷 53-62页

作者： Yong Qin Tianxiao Wang Xuyang Li Hao Wang Xiaogang Guo Institute of Advanced Structure Technology Beijing Institute of Technology Beijing China

This research successfully developed a fabric sensor with an exceptional linearity and sensitivity based on Ecoflex/carbon composite ink, which holds significant potential for the field of intelligent wearable devices. The sensor's substrate is crafted from woven fabric, selected for its flexibility and breathability, making it an ideal choice for wearable applications. Incorporating Ecoflex/carbon composite ink as a functional material endows the sensor with a favorable linear resistance change rate and ensures its stability. Itis worth noting that the conductive network of the pressure-sensitive layer, made from Ecoflex/carbon composite ink, is firmly embedded within the elastic substrate rather than merely adhered to the fabric surface, thereby conferring superior mechanical strength to the pressure sensor. The fabric sensor exhibits a high linear resistance change rate ( R 2 = 0.9965) across a broad strain range (0%–100%) and maintains remarkable durability after 2000 cycles of cyclic stretching. In terms of application, the intelligent fabric sensor is integrated into a woven glove designed to monitor finger movements to control the navigation between different PowerPoint slides. This innovative application showcases the practicality of intelligent fabric sensors in human–computer interaction, particularly in enhancing the interactivity of presentations and educational settings. The demonstration of this smart glove reflects the sensor's potential applications in wearable electronic devices and paves new directions for the future development of intelligent interactive devices. Equipped with this smart glove, users can interact with electronic devices intuitively and naturally, enhancing operational convenience and opening up new possibilities for the application of innovative wearable technology.

关键词： Ecoflex/carbon composite ink exceptional linearity and sensitivity fabric sensor smart woven glove

来源：评论

学校读者我要写书评

暂无评论

Bi-sided laser-induced graphene sensor with decoupled bending and stretching sensing

引用

The European Physical Journal Special Topics 2025年 1-11页

作者： Li, Xuyang Wang, Hao Qin, Yong Guo, Xiaogang Institute of Advanced Structure Technology Beijing Institute of Technology Beijing China

As joint bending deformation is a primary feature of biological motions, measuring the joint angle variations of human is crucial, especially due to its significant spatial coordinate transformation and highly variable effective strain distribution across the section. The coupled deformation mode and the remarkable strain make the precious monitor of the joint motion challenging. In this study, we designed a monolithic flexible sensor with bi-side laser-induced graphene (BS-LIG) with a decoupling capability for tension and bending deformation modes. The sensor featured a PDMS substrate with sensing units on both surfaces can eliminate the contribution of tensile strain of the neural plane on the sensing value by utilizing the difference of the two-strain data, offering a reliable data in feedbacking the value of the real-time joint angle. Benefiting from the inherent softness and stretchability of PDMS, the BS-LIG sensor can withstand a tension of over 45% and a bending deformation up to 180°. Its electrical signal changes show excellent linearity with both strain and angle. Moreover, the sensor can accurately detect signal changes under varying loading rates and demonstrates high durability. Demonstrations include monitoring the bending deformation of human fingers and wrists validated the flexible sensor’s outstanding performance and significant potential for application in wearable electronic devices.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Brief review of external physical field-boosted low-temperature electrodeposition for metals and alloys

引用

International Journal of Minerals,Metallurgy and Materials 2025年第5期32卷 992-1007页

作者： Junjian Zhou Zhiyuan Li Qi Wang Na Li Xu Li Yana Wang Weili Song Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Beijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510006China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai Zhuhai 519082China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Mechanical and Vehicular Engineering Beijing Institute of TechnologyBeijing 100081China

Electrochemical metallurgy at low temperature(<473 K)shows promise for the extraction and refinement of metals and alloys in a green and sustainable ***,the kinetics of the electrodeposition process is generally slow at low temperature,resulting in large overpotential and low current ***,the application of external physical fields has emerged as an effective strategy for improving the mass and charge transfer processes during electrochemical *** review highlights the challenges associated with low-temperature electrochemical processes and briefly discusses recent achievements in optimizing electrodeposition processes through the use of external physical *** regulating effects on the optimization of the electrodeposition process and the strategies for select-ing various external physical fields,including magnetic,supergravity,and ultrasonic fields are summarized from the perspectives of equipment and ***,advanced methods for in-situ characterization of external physical field-assisted electrodeposition processes are reviewed to gain a deeper understanding of metallic *** in-depth exploration of the mechanism by which external physical fields affect the electrode process is essential for enhancing the efficiency of metal extraction at low temperatures.

关键词： low-temperature electrodeposition external physical field electrode kinetics low-temperature electrolyte in-situ characteriz-ation methods

来源：评论

学校读者我要写书评

暂无评论

Synergic strength-ductility enhancement in bimodal titanium alloy via a heterogeneous structure induced by theslip

引用

材料科学技术（英文版） 2025年第1期204卷 255-267页

作者： Tingyi Lin Lei Zhou Yingfei Guo Pingwei Xu Yusong Li Jiaxun Zhang Yilong Liang Yu Liang College of Materials and Metallurgy Guizhou UniversityGuiyang 550025China Guizhou Key Laboratory for Mechanical Behavior and Microstructure of Materials Guizhou UniversityGuiyang 550025China National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology Guiyang 550025China Engineering Training Center Guizhou Institute of TechnologyGuiyang 550003China College of Materials and Metallurgy Guizhou UniversityGuiyang 550025China Guizhou Key Laboratory for Mechanical Behavior and Microstructure of Materials Guizhou UniversityGuiyang 550025China National & Local Joint Engineering Laboratory for High-Performance Metal Structure Material and Advanced Manufacturing Technology Guiyang 550025China

In this work,a heterogeneous structure(HS)with an alternating distribution of coarse and fine α lamella is fabricated in bimodal Ti6242 alloy via insufficient diffusion of alloying elements induced by fast heat-ing *** of a distinct interface between the primary α phase(αp)and β transformation microstructure(βt)in the equiaxed microstructure(EM),all αp/βt interfaces are eliminated in the HS,and the large αp phases are replaced by coarse α *** to the EM alloy,the heterostruc-tured alloy exhibits a superior strength-ductility *** enhanced strength is predominantly attributed to the increased interfaces of α/β plates and hetero-deformation induced(HDI)strengthening caused by back ***,good ductility is ascribed to its uniform distribution of coarse and fineα lamella,which effectively inhibits strain localization and generates an extra HDI *** can be evidenced by the accumulated geometrically necessary dislocations(GNDs)induced by strain partitioning of the ***,the HDI causes extradislocations piling up in the coarse αlamella,which generates an extra strain hardening to further improve the *** hetero-interface coordinated deformation mechanism sheds light on a new perspective for tailoring bimodal titanium al-loys with excellent mechanical properties.

关键词： Bimodal Ti6242 alloy Heterogeneous structure Tensile properties dislocation

来源：评论

学校读者我要写书评

暂无评论

Conformal geometric design and additive manufacturing for special-shaped TPMS heat exchangers

引用

International Journal of Heat and Mass Transfer 2025年 247卷

作者： Zhang, Yijin Peng, Fei Jia, Heran Zhao, Zeang Wang, Panding Duan, Shengyu Lei, Hongshuai Institute of Advanced Structure Technology Beijing Institute of Technology Beijing100081 China Beijing Institute of Astronautical Systems Engineering Beijing100076 China

Additive manufacturing (AM) technology has advanced the development of heat exchangers based on Triply periodic minimal surfaces (TPMS). Although TPMS-based heat exchangers enhanced heat transfer capabilities, designing engineering special-shaped heat exchangers that conform to AM process constraints required reducing supports and preventing leakage. This paper proposed a novel conformal filling method to design special-shaped TPMS heat exchangers, which improved fragmentation and leakage by locally altering the cell shape. The study investigated ten different structures based on tubes, Gyroid, Schwarz-D, I-WP, and Primitive and each filled in various orientations. The effects of design parameters of TPMS heat exchangers were investigated through numerical and experimental studies. How controlling the shape and manufacturing parameters during the fabrication process was investigated to ensure the designed structure would not leak. Different TPMS metal heat exchangers, fabricated by AlSi10Mg powder using Laser powder bed fusion (L-PBF), were evaluated by micro-computed tomography (μ-CT) to verify the completeness of the heat exchanger channels. Results showed that the method improved the heat transfer efficiency by enhancing the flow uniformity. Conformal I-WP structure achieved a twice increase and Primitive structure enhanced by three times. This method benefits the manufacturing and heat exchange capabilities of AM heat exchangers. © 2025 Elsevier Ltd

关键词： Magnesium powder

来源：评论

学校读者我要写书评

暂无评论

Rapid prediction of effective absorption bandwidth in PEEK/CF additive manufacturing metastructure via interpretable machine learning

引用

Journal of Materials Science & technology 2025年 239卷 307-319页

作者： Shuailong Gao Huaiyu Dong Yuhui Zhang Yingjian Sun Chen Yu Zhichen Wang Haofeng Zhang Yixing Huang Ying Li Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China

The development of machine learning has provided a new perspective for the design of electromagnetic metastructures, particularly in the rapid design of key performance metrics such as effective absorption bandwidth. Traditional methods, grounded in electromagnetic theory and empirical approaches, often lacked sufficient flexibility and adaptability. In this work, three types of machine learning models were developed to establish the relationship between effective absorption bandwidth and structural parameters. The results indicated that the random forest model achieved the most accurate and efficient design for this task. Then, the additive manufacturing optimal metastructure obtained using this approach outperformed existing designs in terms of both effective absorption bandwidth and reflectivity, while also exhibiting superior radar stealth performance and mechanical load-bearing capacity. Furthermore, through interpretable machine learning and data analysis, the intrinsic mechanisms underlying the relationship between effective absorption bandwidth and structural parameters were revealed. Overall, this work introduced a novel approach to metastructure design and enhanced the understanding of the relationship between structural parameters and electromagnetic properties, providing a key foundation for future design.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes:Electrical field distribution effects

引用

Fundamental Research 2025年第1期5卷 347-353页

作者： Xulan Xue Menglin Li Zhenjie Liu Chenhui Wang Jincheng Xu Shuangpeng Wang Hanzhuang Zhang Haizheng Zhong Wenyu Ji Key Lab of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin UniversityChangchun 130012China MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Institute of Applied Physics and Materials Engineering University of MacaoTaipa 999078China

With the development in fabricating efficient perovskite light emitting diodes(PeLEDs),improving the operating stability becomes an urgent *** we report quantum dot(QD)enhanced stability of PeLEDs by introducing CdSe/ZnS core-shell QDs in toluene anti-solvent during in-situ fabrication of FAPbBr3 perovskite nanocrystals(PNCs)*** comparison with PNC films with pristine toluene as the anti-solvent,the as-prepared FAPbBr3 PNC films with a QD monolayer on the surface exhibit improved photoluminescence quantum yield,enhanced photostability and better *** from these advantages,the peak luminance and the maximum external quantum efficiency of the PeLED containing QD monolayer are increased from 6807 cd/m^(2)to 86,670 cd/m^(2)and 2.4%to 7.1%,*** T50 lifetime under the initial luminance of 1021 cd/m^(2)approaches 83 *** on electrical field simulation and transient electroluminescence measurements,the enhanced stability can be mainly attributed to the electrical field redistribution induced by the QD *** work demonstrates that the combination of QDs and perovskites provides an effective strategy to address the operational stability of *** insights into electrical field distribution effect will make great impact on stability improvement of other perovskite based devices.

关键词： Perovskite nanocrystals Quantum dots Electrical field distribution Light-emitting diodes Operational stability

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：