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high mech.nical strength Si anode synthesis with interlayer bonded expanded graphite structure for lithium-ion batteries

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Journal of Energy Chemistry 2024年第6期93卷 253-263,I0007页

作者： Wenhui lai Jong hak Lee Lu Shi Yuqing Liu Yanhui Pu Yong Kang Ong Carlos Limpo Ting Xiong Yifan Rao Chorng haur Sow Barbaros Ozyilmaz Department of Material Science&Engineering National University of SingaporeSingapore 117575Singapore Center for Advanced 2D Materials National University of SingaporeSingapore 117546Singapore Department of Physics National University of SingaporeSingapore 117551Singapore Institute forFunctional Intelligent Materials National University of SingaporeSingapore 117544Singapore

Despite advancements in silicon-based anodes for high-capacity lithium-ion batteries,their widespread commercial adoption is still h.ndered by significant volume expansion during cycling,especially at high active mass loadings crucial for practical *** root of these challenges lies in the mech.nical instability of the material,which subsequently leads to the structural failure of the ***,we present a novel synthesis of a composite combining expanded graphite and silicon *** composite features a unique interlayer-bonded graphite structure,achieved through the application of a modified spark plasma sintering ***,this innovative structure not only facilitates efficient ion and electron transport but also provides exceptional mech.nical strength(Vickers hardness:up to658 MPa,Young's modulus:11.6 GPa).This strength effectively accommodates silicon expansion,resulting in an impressive areal capacity of 2.9 mA h cm^(-2)(736 mA h g^(-1)) and a steady cycle life(93% after 100cycles).Such outsta nding performance is paired with features appropriate for large-scale industrial production of silicon batteries,such as active mass loading of at least 3.9 mg cm^(-2),a high-tap density electrode material of 1.68 g cm^(-3)(secondary clusters:1.12 g cm^(-3)),and a production yield of up to 1 kg per day.

关键词： Lithium-ion battery Silicon anode Spark plasma sintering Interlayer bonding Mech.nical strength Tap density

Recent innovations in laser additive manufacturing of titanium alloys

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International Journal of Extreme Manufacturing 2024年第3期6卷 2-37页

作者： Jinlong Su Fulin Jiang Jie Teng Lequn Ch.n Ming Yan Guillermo Requena lai-Ch.ng Zh.ng Y Morris Wang Ilya V Okulov h.ngmei Zhu Chaolin Tan College of Materials Science and Engineering Hunan UniversityChangsha 410082People’s Republic of China Singapore Institute of Manufacturing Technology(SIM Tech) Agency for ScienceTechnology and Research(A∗STAR)5 Cleantech LoopSingapore 636732Singapore Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Institute of Materials Research German Aerospace Center(DLR)Linder Höhe51147 CologneGermany Centre for Advanced Materials and Manufacturing Edith Cowan University270 Joondalup DriveJoondalupPerthWestern Australia 6027Australia Department of Materials Science and Engineering University of CaliforniaLos AngelesCA 900095United States of America Leibniz Institute for Materials Engineering-IWT Badgasteiner Str.328359 BremenGermany Faculty of Production Engineering University of BremenBadgasteiner Str.128359 BremenGermany Key Laboratory of h.nan Province of Equipment Safety Service Technology under Extreme Environment University of South ChinaHengyangPeople’s Republic of China RWTh Aach.n University Metallic Structures and Materials Systems for Aerospace EngineeringD-52062 AachenGermany

Titanium(Ti)alloys are widely used in high-tech fields like aerospace and biomedical *** additive manufacturing(LAM),as an innovative technology,is the key driver for the development of Ti *** the significant advancements in LAM of Ti alloys,there remain challenges that need further research and development *** recap the potential of LAM high-performance Ti alloy,this article systematically reviews LAM Ti alloys with up-to-date information on process,materials,and *** feasible solutions to advance LAM Ti alloys are reviewed,including intelligent process parameters optimization,LAM process innovation with auxiliary fields and novel Ti alloys customization for *** auxiliary energy fields(***,acoustic,mech.nical deformation and magnetic fields)can affect the melt pool dynamics and solidification behaviour during LAM of Ti alloys,altering microstructures and mech.nical *** kinds of novel Ti alloys customized for LAM,like peritecticα-Ti,eutectoid(α+β)-Ti,hybrid(α+β)-Ti,isomorphousβ-Ti and eutecticβ-Ti alloys are reviewed in ***,mach.ne learning in accelerating the LAM process optimization and new materials development is also *** review summarizes the material properties and performance envelops and benchmarks the research achievements in LAM of Ti *** addition,the perspectives and further trends in LAM of Ti alloys are also highlighted.

关键词： additive manufacturing titanium alloys auxiliary field mach.ne learning aerospace materials lightweight materials novel alloys

Intermolecular hydrogen-bonding as a robust tool toward significantly improving the photothermal conversion efficiency of a nIR-II squaraine dye

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Ch.nese Chemical Letters 2024年第4期35卷 310-315页

作者： Songtao Cai Liuying Wu Yuan Li Soham Samanta Jinying Wang Bing Liu Feihu Wu Kaitao lai Yingchao Liu Junle Qu Zhigang Yang Center for Biomedical Photonics&Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

The photothermal therapy(PTT) has come across as a promising noninvasive therapeutic strategy for tumor treatment. however, low photothermal conversion efficiency(PCE) and hydrophobicity may impede the therapeutic efficacy of organic photothermal agents and an efficient PTT-agent must overcome these two major challenges. In this work, we developed a new strategy to promote higher PCE wherein the intermolecular hydrogen-bonding interaction between the single dye molecule and water facilitated the transformation of the absorbed energy into the heat. A hydrophilic squaraine dye(SCy1) with the second near-infrared region(nIR-II) absorption and extremely low emission were designed to exhibit much higher PCE th.n that of the analogues of pentameth.ne-dyes(PCy1, PCy2). The presence of the ‘–O-' at middle of squaric cycle enabled the intermolecular h-bonding formation between the SCy1 and water to promote the energy dissipation ch.nnel. Moreover, the introduction of long-chain ph.nylsulfonate groups helped in to improve the water solubility apart from serving as an additional means of further enh.ncing PCE through fluorescence quench.ng. Therefore, SCy1 with a squaraine backbone and long-chain sulfonate moieties revealed outstanding photothermal stability and anti-aggregation activity apart from showing exceptionally high PCE(74%) in water. SCy1 demonstrated excellent therapeutic efficacy wh.n applied in the PTT treatment of tumor-bearing mice under a laser irradiation of 915 nm.

关键词： Squaraine-based cyanine hydrogen bonds high PCE Anti-aggregation Photothermal therapy

致力保障個人资料私隱,促進大灣區之互聨互通

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中国法律（中英文版） 2024年第1期 66-68,152-154页

作者：鐘麗玲不详

自回歸祖國以来,香港地區在國家的大力支持下成功落實“一國兩制”,“一國兩制”原则爲香港地區長期的繁榮稳定及經濟體系提供制度上最佳的保障。

关键词：制度保障互通

Factors controlling the metal fertilization of granitic magma: Constraints from amphibole and biotite geochemistry of the Sh.ngch.ng pluton， Dabie orogen， Central Ch.na

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Journal of Earth Science 2024年

作者： Ch.ng-lai Deng hui-Min Su Wu Li Wen-Tian Li State Key Laboratory of Geological Processes and Mineral Resources， Collaborative Innovation Center for Exploration of Strategic Mineral Resources， School of Earth Resources， Ch.na University of Geosciences Wuhan School of Resources and Geosciences， Ch.na University of Mining and Technology

It is very common for similar granitoids to be emplaced in the same tectonic region， with some being metal-fertilized while others are barren. The reasons for this are still not clear. here， we take the Sh.ngch.ng pluton as an example. This pluton occurs close to the giant Shapinggou porphyry Mo deposit， and we use amphibole and biotite geochemistry as sensitive tracers to explore this issue. The Sh.ngch.ng granitoids comprise the Sigudun （SGD） and Shiguwa （SGW） units， with emplacement ages ranging from 140 ± 3 Ma to 134 ± 2.4 Ma， as revealed by titanite U-Pb dating. The geochemical data of amphibole and biotite indicate that the magma intruded from depths of ～3.3 km to ～2.3 km with increasing oxygen fugacity. The modeled results indicate that water content is an essential factor for metal fertilization， as the Sh.ngch.ng pluton has a lower water content th.n the Shapinggou Mo-bearing granite. The Sh.ngch.ng pluton is also characterized by fluorine-poor conditions， with lower halogen fugacity values of IV（F） and log (f h2O/f hF)fluid. In contrast， the increasing Y/ho and nb/Ta ratios of the Shapinggou Mo-bearing granite indicate the F-rich.nature of the fertilized Shapinggou magma， and its lower Zr/hf and K/Rb ratios suggest a greater magma differentiation. Therefore， water-poor and F-poor magma， in combination with low-degree fractional crystallization， may be the major controlling factors responsible for the Mo-barren nature of the Sh.ngch.ng pluton.

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Room-temperature ph.non-coupled single-photon emission in hexagonal boron nitride

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Science Ch.na(Physics,Mech.nics & Astronomy) 2024年第5期67卷 109-114页

作者： Jia-Min lai Qing-hai Tan Feilong Song haonan Ch.ng Yanpei Lv Xue-Lu Liu Jinghua Teng Weibo Gao Ping-h.ng Tan Jun Zh.ng State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing100083China Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education&Research Institute of Materials Science Shanxi Normal UniversityTaiyuan 030000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)Singapore 138634Singapore

Photon-lattice(ph.non)coupling is fundamental to light-matter interaction,particularly wh.n it reaches the quantum limit of the ph.non-coupled single-photon emission,which holds great potential for quantum manipulation and quantum information ***,we report single defect state-ph.non coupling in hexagonal boron nitride(h Bn)at room *** ultrabroad spectrum of single-photon emissions can be achieved by selecting the excitation *** photoluminescence excitation spectroscopy,we observe single-ph.non-assisted resonance-enh.nced single-photon emission,along with multiple ph.non replicas that herald the creation of ph.non Fock *** also develop a transition model to gain insight into the physical process beh.nd the single defect state-ph.non *** work sets the stage for manipulating electron-ph.non coupling state with single quantum-level precision at room temperature.

关键词： temperature ph.non hexagonal

Interface-induced polymerization strategy for constructing titanium dioxide embedded carbon porous framework with enh.nced chemical immobilization towards lithium polysulfides

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nano Research 2024年第3期17卷 1473-1481页

作者： Yue Ouyang Xiaoxiao Li Jiexin Zhu Wei Zong Yuh.ng Dai Xuan Gao Wei Zh.ng Sh.ngyuan Yang Roohollah Bagherzadeh Feili lai Yue-E Miao Tianxi Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai 201620China The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China Advanced Fibrous Materials LAB Institute for Advanced Textile Materials and Technologies(ATMT)School of Advanced Materials and ProcessesAmirkabir University of TechnologyTehran 15914Iran Christopher Ingold Laboratory Department of ChemistryUniversity College London20 Gordon StreetLondon WC1H 0AJUK Department of Chemistry KU LeuvenCelestijnenlaan 200FLeuven 3001Belgium

The shuttle effect induced by soluble lithium polysulfides(LiPSs)is known as one of the crucial issues that limit the practical applications of lithium-sulfur(Li-S)***,a titanium dioxide nanoparticle embedded in nitrogen-doped porous carbon nanofiber(TiO_(2)@nCnF)composite is constructed via an interface-induced polymerization strategy to serve as an ideal sulfur *** the protection of the nanofiber walls,the uniformly dispersed TiO_(2) nanocrystalline can act as capturing centers to constantly immobilize LiPSs towards durable sulfur ***,the mesoporous microstructure in the fibrous framework endows the TiO_(2)@nCnF host with strong physical reservation for sulfur and LiPSs,sufficient pathways for electron/ion transfer,and excellent endurance for volume *** expected,the sulfur-loaded TiO_(2)@nCnF composite electrode presents a fabulous rate performance and long cycle lifespan(capacity fading rate of 0.062%per cycle over 500 cycles)at 2.0 ***,the assembled Li-S batteries harvest superb areal capacity and cycling stability even under high sulfur loading and lean electrolyte conditions.

关键词： interface-induced polymerization electrospun porous nanofibers lithium-sulfur(Li-S)batteries high sulfur loading lithium polysulfides(LiPSs)immobilization

Preparation of Fe-As alloys by mech.nical alloying and vacuum hot-pressed sintering:microstructure evolution,mech.nical properties,and mech.nisms

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Rare Metals 2024年第8期43卷 3876-3892页

作者： Fei Chai Fei-Ping Zhao Zh.n hu Shi-Yi Wen Ben-hammouda Samia Ze-Lin Fu Xin-Ting lai Yan-Jie Liang Xiao-Bo Min Li-Yuan Chai School of Metallurgy and Environment Central South UniversityChangsha 410083China Ch.nese national Engineering Research Center for Control&Treatment of heavy Metal Pollution Institute of Environmental EngineeringCentral South UniversityChangsha 410083HunanChin State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Department of Building Civiland Environmental EngineeringConcordia UniversityMontreal H3G 1M8Canada

Arsenic materials have attracted great attention due to their unique ***,research concerning iron-arsenic(Fe-As) alloys is very scarce due to the volatility of As at low temperature and the high melting point of ***,a new Fe-As alloy was obtained by mech.nical alloying(MA) followed by vacuum hot-pressed sintering(VhPS).Moreover,a systematic study was carried out on the microstructural evolution,phase composition,leach.ng toxicity of As,and physical and mech.nical properties of Fe-As alloys with varying weight fractions of As(20%,25%,30%,35%,45%,55%,65%,and 75%).The results showed that pre-alloyed metallic powders(PAMPs) have a fine grain size and specific supersaturated solid solution after MA,which could effectively improve the mech.nical properties of Fe-As alloys by VhPS.A high density(> 7.350 g·cm^(-3)),low toxicity,and excellent mech.nical properties could be obtained for FeAs alloys sintered via VhPS by adding an appropriate amount of As,which is more valuable th.n commercial Fe-As *** Fe-25% As alloy with low toxicity and a relatively high density(7.635 g·cm^(-3)) provides an ultra-high compressive strength(1989.19 MPa),while the Fe-65% As alloy owns the maximum Vickers hardness(hVo.5 899.41).After leach.ng by the toxicity characteristic leach.ng procedure(TCLP),these alloys could still maintain good mech.nical performance,and the strength.ning mech.nisms of Fe-As alloys before and after leach.ng were *** in the grain size,micro structure,and phase distribution induced significant differences in the compressive strength and hardness.

关键词： Mech.nical alloying Vacuum hot-pressed sintering high-pressure Arsenic-iron alloys Mech.nical properties

Recent advancements in the diagnosis and treatment of acral melanoma

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第2期25卷 106-122页

作者： Ahmad ALhASKAWI Sohaib hasan Abdullah EZZI Yanzhao DOnG haiying ZhOU Zewei WAnG Jingtian lai Ch.ngjun YAO Vishnu Goutham KOTA Mohamed hasan Abdulla hasan ABDULLA hui LU Department of Orthopedics the First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou310003China Department of Orthopaedics Third Xiangya HospitalCentral South UniversityChangsha410013China Zhejiang University School of Medicine Hangzhou310058China Alibaba-Zhejiang University Joint Research Center of Future Digital healthcare Zhejiang UniversityHangzhou310058China

Acral melanoma(AM)is the most common histologic subtype of melanoma in dark-skinned patients and is associated with a worse prognosis and a high mortality rate,largely due to the inconspicuous nature of early-stage lesions,which can lead to late *** of the overlapping clinical and histopathological features of AM with other forms of cutaneous melanomas,early detection of AM requires a multidisciplinary approach that integrates various diagnostic modalities,including clinical examination,dermoscopy,histopathology,molecular testing,radiological imaging,and blood *** surgery is the preferred method of treatment for AM,other therapeutic options may be employed based on the stage and underlying etiology of the *** checkpoint inhibitors,molecular targeted therapy,radiotherapy,chemotherapy,and oncolytic virotherapy represent promising advanced treatment options for *** this review,we provide an overview of the latest advancements in diagnostic and therapeutic methods for AM,highlighting the importance of early detection and the prompt,individualized management of this challenging disease.

关键词： Acral melanoma Acral lentiginous melanoma Acral nevus Cutaneous malignant melanoma Dermoscopy Oncolytic virotherapy