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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

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High-entropy(La_(0.2)Nd_(0.2)Sm_(0.2)Gd_(0.2)Yb_(0.2))_(2)(Zr_(0.75)Ce_(0.25))_(2)O_(7)thermal barrier coating material with significantly enhanced fracture toughness

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Chinese Journal of Aeronautics 2023年第4期36卷 556-564页

作者： Donghui GUO Feifei ZHOU Baosheng XU Yiguang WANG You WANG Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Department of Materials Science School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China

Poor fracture toughness leads to premature failure of La_(2)(Zr_(0.75)Ce_(0.25))_(2)O_(7)(LCZ)ther-mal barrier coatings in an elevated temperature service environment.A novel coating material,namely(La_(0.2)Nd_(0.2)Sm_(0.2)Gd_(0.2)Yb_(0.2))_(2)(Zr_(0.75)Ce_(0.25))_(2)O_(7)(LNSGY)based on the high-entropy con-cept,was successfully fabricated by solid-state *** microstructure of LCZ and LNSGY was investigated by X-Ray Diffraction(XRD),Raman Spectrometer(RS),Transmission Electronic Microscopy(TEM)and Scanning Electron Microscopy(SEM).The fracture toughness of the LCZ and LNSGY ceramics was *** LNSGY has excellent high-temperature phase stability,and the grain size of LNSGY ceramic is smaller than that of LCZ ceramic at an elevated temper-ature due to the sluggish diffusion *** with LCZ(fracture toughness is(1.4±0.1)MPa·m^(1/2)),the fracture toughness of LNSGY is significantly enhanced(fracture toughness is(2.0±0.3)MPa·m^(1/2)).Therefore,the LNSGY can be a promising advanced thermal barrier coat-ing material in the future.

关键词： Fracture toughness High-entropy ceramics High-temperature phase sta-bility Rare-earth zirconate Thermal barrier coatings

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Pronounced impact of size and shape effects on creep rupture life of a K439B superalloy combustion chamber casting simulator

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China Foundry 2025年第2期22卷 215-221页

作者： Wen-tong Liu Yi-dong Wu Lei Gao Jing-yang Chen Cheng-bo Xiao Xi-dong Hui State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical MaterialsBeijing 100095China

The size and shape effect(SSE)of components has become a critical issue for mechanical properties,application reliability,and *** this study,the creep rupture life(CRL)of components with different wall thicknesses and positions in a combustion chamber casing simulator made of K439B superalloy was *** intrinsic mechanisms of the SSE were explored from the dendrite structure,volume fraction and size of theγ'phase,and element segregation,*** is shown that this casting exhibits a strong SSE of creep rupture life,characterized by a significant difference in the CRL values up to 60%with the variation of wall thickness and position in the *** terms of casting technology,the influence of SSE on CRL is actually determined by the cooling *** SSE on the creep rupture life originates from the dendrite structure(such as the secondary dendrite arm spacing),volume fraction size of theγ'phase in the dendrite trunk,and elements segregation *** work may have implications for the design and application of engineering components with large sizes and complex structures.

关键词： K439B superalloy size and shape effects creep rupture life cooling rate γ'phase combustion chamber casing simulator

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A Novel Multiphase Stainless Steel with Ultra-Low Yield Ratio and High Ductility

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Acta Metallurgica Sinica(English Letters) 2024年第10期37卷 1777-1784页

作者： Menghao Liu Cuiwei Du Yuewu Li Xiaogang Li Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing100083China

This study focuses on developing a novel multiphase stainless steel with enhanced ductility and an ultralow yield ratio achieved through solid-solution *** steel exhibits remarkable mechanical properties:a tensile strength of approximately 1114 MPa,an ultralow yield ratio of 0.36,exceptional uniform elongation of approximately 17.48%,and total elongation of approximately 21.73%.The remarkable ductility of the steel can be attributed to the transformation-induced plasticity(TRIP)effect observed in the retained austenite,while its exceptional strength results from the combined effects of TRIP and the martensite phase.

关键词： Stainless steels Metastable phases Low yield ratio Martensitic phase transformation

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On-demand engineerable visible spectrum by fine control of electrochemical reactions

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National science Review 2024年第3期11卷 239-249页

作者： Qirong Liu Lei Liu Yongping Zheng Min Li Baofu Ding Xungang Diao Hui-Ming Cheng Yongbing Tang Advanced Energy Storage Technology Research Center Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced Technology Chinese Academy of Sciences School of Energy and Power Engineering North University of China School of Resource Environment and Safety EngineeringHunan University of Science and Technology School of Energy and Power Engineering Beihang University Shenzhen Key Laboratory of Energy Materials for Carbon Neutrality Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences

Tunability of optical performance is one of the key technologies for adaptive optoelectronic applications,such as camouflage clothing, displays, and infrared shielding. High-precision spectral tunability is of great importance for some special applications with on-demand adaptability but remains challenging. Here we demonstrate a galvanostatic control strategy to achieve this goal, relying on the finding of the quantitative correlation between optical properties and electrochemical reactions within materials. An electrochromic electro-optical efficiency index is established to optically fingerprint and precisely identify electrochemical redox reactions in the electrochromic device. Consequently, the charge-transfer process during galvanostatic electrochemical reaction can be quantitatively regulated, permitting precise control over the final optical performance and on-demand adaptability of electrochromic devices as evidenced by an ultralow deviation of <3.0%. These findings not only provide opportunities for future adaptive optoelectronic applications with strict demand on precise spectral tunability but also will promote in situ quantitative research in a wide range of spectroelectrochemistry, electrochemical energy storage, electrocatalysis, and material chemistry.

关键词： electrochromics fine control spectral tunability high precision galvanostatic control

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Exploring the potential of residual mechanism in spiking neural networks for human action recognition

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science China Technological sciences 2025年第5期68卷 297-298页

作者： Jiaqi CHEN Ziliang REN Qieshi ZHANG Fuyong ZHANG Wenguo LIU School of Computer Science and Technology Dongguan University of Technology Shenzhen Institute of Advanced Technology Chinese Academy of Sciences The Chinese University of Hong Kong

Significant progress has been made in brain-computer science and technology through applying spiking neural networks(SNNs) [1]. More recently,due to its potential of processing complex spatio-temporal information,SNNs...

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One-pot synthesis of Cu:InP multishell quantum dots for nearinfrared light-emitting devices

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Nano Research 2024年第12期17卷 10655-10660页

作者： Pan Huang Xiaonan Liu Xiao Liu Jing Wei Fangze Liu Hongbo Li Advanced Research Institute of Multidisciplinary Sciences Beijing Institute of TechnologyZhuhai 519088China Advanced Research Institute of Multidisciplinary Sciences Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications Experimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

InP quantum dots(QDs)are promising heavy-metal-free materials for next-generation solid-state lighting,covering from visible to near-infrared(NIR)*** with the rapid development of visible InP QDs,the synthesis of high-performance NIR InP QDs remains to be *** this work,we report a simple one-pot synthesis of NIR InP QDs by controlling the Cu doping and designing a multishell *** replacing the conventional highly reactive phosphorus precursor with a slightly less reactive and low-cost ammonia phosphorus precursor,the nucleation process is effectively regulated for efficient Cu *** addition,the epitaxial growth of the ZnSe/ZnS shell further improves the stability and optical properties of InP ***,the synthesized Cu:InP/ZnSe/ZnS QDs have a photoluminescence quantum yield of 70%centered at 833 *** NIR InP lightemitting diodes exhibit a maximum radiance of 3.1 W·sr^(-1)·m^(-2)and a peak external quantum efficiency of 2.71%centered at 864 nm.

关键词： near-Infrared InP quantum dots core-shell light-emitting diodes

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Interactive effect of thermal aging and proton irradiation on microstructural evolution and hardening ofδ-ferrite in 308L stainless steel weld metal

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Journal of Materials science & technology 2024年第3期170卷 140-155页

作者： Xiaodong Gao Xiaodong Lin Tao Guo Lining Xu Yaolei Han Baolong Jiang Xingyuan Mei Qunjia Peng Lijie Qiao Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Institute of Materials Shanghai UniversityShanghai 200072China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Suzhou Nuclear Power Research Institute Suzhou 215004China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

In the harsh service environment of high temperature and intense neutron irradiation in water-cooled nuclear reactors,the austenitic stainless steel weld overlay cladding on the inner surface of the reactor pressure vessel suffers from thermal aging and irradiation damage simultaneously,which can induce microstructural evolution and hardening of the *** it is quite difficult to achieve this simul-taneous process out of the pile,two kinds of combined experiments,i.e.,post-irradiation thermal aging and post-aging irradiation were performed on 308 L stainless steel weld metals in this *** interactive effect of thermal aging and proton irradiation on microstructural evolution and hardening ofδ-ferrite in 308 L weld metal was investigated by combining atom probe tomography,transmission elec-tron microscopy and nanoindentation *** results revealed that thermal aging could eliminate the dislocation loops induced by irradiation and affect the phase transition process by accelerating spinodal decomposition and G-phase precipitation,thus enhancing hardening of irradiatedδ-*** the effect of irradiation on the microstructure and hardening of thermally agedδ-ferrite,however,intensive collision cascades can intensify G-phase precipitation and dislocation loop formation but decrease spinodal decomposition,leading to a limited effect on hardening of thermally agedδ-***,the interaction of thermal aging and irradiation can promote G-phase ***,the interaction can causeδ-ferrite hardening,which is mainly influenced by spinodal decomposition,followed by G-phase and dislocation loops,where spinodal decomposition and G-phase cause hardening by inducing strain fields.

关键词： Austenitic stainless steel weld metals Thermal aging Proton irradiation Interaction Microstructural evolution Hardening

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Microbial fouling induced by typical extreme environment-resistant bacteria in oligotrophic solutions of simulated condensate of manned spacecrafts

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Chinese Journal of Aeronautics 2025年第2期38卷 597-616页

作者： Yali FENG Junhang CHEN Qianqian LIU Nana CHEN Lin LU Chaofang DONG Kui XIAO Institute of Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China Corrosion and Protection Center University of Science and Technology BeijingBeijing 100083China

Microbial fouling is an important challenge in water recovery system of manned spacecrafts for longer term *** fouling of 5A06 aluminium alloy induced by typical extreme environment-resistant bacteria in oligotrophic solutions of simulated condensate of manned spacecraft was *** cereus showed poor survival ability to oligotrophic environments,and a small amount of remaining live *** cells mainly existed in the form of spores without forming *** when *** was mixed cultured with Cupriavidus metallidurans,the system was mainly affected by *** biofilms rather than *** *** could promote the thickness of passive films of aluminum alloy,so *** posed a minor threat to the corrosion of 5A06 aluminum ***,*** showed strong adaptability to oligotrophic environments and formed a large number of *** the contamination threat of *** still dominated even cultured with *** when cultured with ***,the threat of contamination from *** still ***,*** would pose a threat of microbial fouling to the oligotrophic water recovery system of manned spacecrafts.

关键词： Microbial corrosion Fouling Biofilms Passivation Oligotrophic environment

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Simultaneously enhancing the hot workability and room-temperature strength of Ti-6Al-4V alloy via adding Mo and Fe

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Journal of Materials science & technology 2024年第13期180卷 32-44页

作者： Jie Shen Zhihao Zhang Jianxin Xie Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory for Advanced Materials Processing(MOE) University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

Reducing the hot working temperature and high-temperature deformation resistance of titanium alloy to improve hot rolling and hot extrusion workability of products with thin walls and complex section shapes has always been an important topic in the field of titanium alloy *** paper proposed a strategy of adding Mo and Fe elements to simultaneously reduce the hot working temperature and high-temperature deformation resistance of Ti-6Al-4V *** effects of Mo and Fe contents on the mi-crostructure,β transus temperature(Tp),and high-temperature flow stress(HFS)of Ti-6Al-4V-xMo-xFe(x=0-5)alloys were *** results showed that adding Mo and Fe can substantially reduce the Tp and HFS of the alloy,and greatly improve its room-temperature *** with com-mercial Ti-6Al-4V samples,the T_(β) of Ti-6Al-4V-2Mo-2Fe and Ti-6Al-4V-3Mo-3Fe samples was decreased by 68-98 ℃,and the HFS at 800-900 ℃ was decreased by 37.8%-46.0%.Compared with hot-rolled Ti-6Al-4V samples,the room-temperature tensile strength of hot-rolled Ti-6Al-4V-2Mo-2Fe samples was increased by about 30%,while the elongation hardly *** increased strength was mainly at-tributed to fine grain strengthening and solid solution *** hot workability and room-temperature strength of Ti-6Al-4V alloy can be significantly improved by adding 2-3 wt.%Mo and Fe simultaneously.

关键词： Titanium alloy High-temperature flow stress Hot workability Room-temperature strength

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