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Recent progress about transmission electron microscopy characterizations on lithium-ion batteries

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Journal of Energy Chemistry 2024年第8期95卷 39-56,I0002页

作者： Yihang Liu Qiuyun Li Ziqiang Wang Institute of materials research Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518000GuangdongChina

With the rapid development of portable electronics,new energy vehicles,and smart grids,ion batteries are becoming one of the most widely used energy storage devices,while the safety concern of ion batteries has always been an urgent problem to be *** develop a safety-guaranteed battery,the characterization of the internal structure is indispensable,where electron microscopy plays a crucial *** on this,this paper summarizes the application of transmission electron microscopy(TEM)in battery safety,further concludes and analyzes the aspects of dendrite growth and solid electrolyte interface(SEI)formation that affect the safety of ion batteries,and emphasizes the importance of electron microscopy in battery safety research and the potential of these techniques to promote the future development of this *** advanced electron microscopy techniques and their prospects are also discussed.

关键词： Electron microscopy characterizations Lithium-ion batteries Dendrites SEI

Design of efficient thermoelectric generators

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Science China materials 2024年第1期67卷 377-378页

作者： Min Liu Yanzhong Pei Interdisciplinary materials research center School of Materials Science and EngineeringTongji UniversityShanghai 201804China

Thermoelectricity,which enables direct conversion between heat and electricity,undergoes impressive developments in recent decades,and is particularly promising for recovering low-grade heat of<600 K[1,2].Currently,only Bi2Te3-based thermoelectric devices are commercialized[3].However,the scarcity of tellurium(Te)(Fig.1a)is the main *** leads to numerous recent efforts on the development of efficient nonBi2Te3 thermoelectrics as potential alternatives,and successful examples(Fig.1b)include Mg3Sb2-alloys[2,3]and MgAgSb[1,2].

关键词： enable efficient electricity

深度学习分子动力学模拟助力无铅（K,Na）NbO3铁电材料相变及纳米畴结构研究（英文）

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Science China materials 2024年第9期67卷 3029-3038页

作者：张旭李蓓邹冀刘韩星徐贲刘凯 School of materials Science and Engineering Research Center for Materials Genome EngineeringWuhan University of Technology State Key Laboratory of Advanced Technology for materials Synthesis and Processing Wuhan University of Technology International School of materials Science and Engineering Wuhan University of Technology graduate School China Academy of Engineering Physics

通过多态结构和畴动力学调控,无铅KxNa1-xNbO3（KNN）可拥有优异的铁电和压电性能,并因此获得持续关注.尽管通过组分、相和畴结构等测量可以优化KNN的铁电性能,然而,该体系铁电性能的原子尺度机理仍是一个亟待解决的问题.本文通过训练... 详细信息

通过多态结构和畴动力学调控,无铅KxNa1-xNbO3（KNN）可拥有优异的铁电和压电性能,并因此获得持续关注.尽管通过组分、相和畴结构等测量可以优化KNN的铁电性能,然而,该体系铁电性能的原子尺度机理仍是一个亟待解决的问题.本文通过训练具有从头算精度的深度学习势（DP）,对不同K/Na比例（x=0.25～1.0）的KNN展开了分子动力学模拟研究.DP模型在描述不同相结构下的KNbO3和K0.5Na0.5NbO3的状态方程、弹性常数和声子色散关系等特性上表现出极高的准确性,证实了DP模型的适用性和可扩展性.分子动力学模拟的结果表明,KNN （x=0.25～1.0）的顺电-铁电相变主要受到有序-无序效应的驱动;而位移效应在随后的铁电相变中占主导地位.特别地,随着Na含量的增加,K/Na离子半径差异会引起明显的氧八面体畸变,导致90°畴壁形成更加困难.可以预见的是,基于DP的原子模拟有助于为储能和换能材料的复杂结构、热力学和铁电特性的探索提供一个准确和高效的计算模拟解决方案.

关键词： KNN molecular dynamics deep potential phase transitions domain dynamics

Considerations of advanced aqueous batteries recycling:A perspective

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Journal of Energy Chemistry 2024年第6期93卷 46-54,I0002页

作者： Yun Zhao Yuqiong Kang Hao Du Feiyu Kang Baohua Li Institute of materials research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina

*** Battery technology,serving as a basis for a rechargeable society,has developed rapidly over a century[1].The progress can be roughly divided into three stages,with the initial two mainly focusing on aqueous battery *** to 1859,research primarily focused on the conceptualization of batteries and the development of primary(non-rechargeable)cells[2].In the subsequent150 years,rechargeable battery technology emerged。

关键词： battery Battery primarily

Close-packed layer spacing as a practical guideline for structure symmetry manipulation of IV-VI/I-V-VI_(2) thermoelectrics

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InfoMat 2024年第2期6卷 99-106页

作者： Tao Jin Long Yang Xinyue Zhang Wen Li Yanzhong Pei Interdisciplinary materials research center School of Materials Science and EngineeringTongji UniversityShanghaithe People's Republic of China

The crystal-structure symmetry in real space can be inherited in the reciprocal space,making high-symmetry materials the top candidates for thermoelectrics due to their potential for significant electronic band degeneracy.A practical indicator that can quantitatively describe structural changes would help facilitate the advanced thermoelectric material *** face-centered cubic structures,the spatial environment of the same crystallographic plane family is isotropic,such that the distances between the close-packed layers can be derived from the atomic distances within the *** by this,the relationship between inter-and intra-layer geometric information can be used to compare crystal structures with their desired cubic *** close-packed layer spacing was found to be a practical guideline of crystal structure symmetry in IV-VI chalcogenides and I-V-VI_(2) ternary semiconductors,both of which are historically important *** continuous structural evolution toward high symmetry can be described by the layer spacing when temperature or/and composition change,which is demonstrated by a series of pristine and alloyed thermoelectric materials in this *** layerspacing-based guideline provides a quantitative pathway for manipulating crystal structures to improve the electrical and thermal properties of thermoelectric materials.

关键词： phase transition structure manipulation thermoelectric materials x-ray diffraction

Recent Advances in Asymmetric Structural Composites for Excellent Electromagnetic Interference Shielding: A Review

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Chinese Journal of Polymer Science 2024年第6期42卷 693-710页

作者： Ying Zhou Bai Xue Lan Xie Chang-Mei Wu Qiang Zheng Department of Polymer materials and Engineering College of Materials and Metallurgy Guizhou University National Engineering research center for Compounding and Modification of Polymer materials National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane Processes State Key Laboratory of Public Big Data Guizhou University Department of Polymer Science and Engineering Zhejiang University

Since electromagnetic pollution is detrimental to human health and the environment, numerous efforts have been successively made to achieve excellent electromagnetic interference shielding effectiveness(EMI SE) via designing the hierarchical structures for electromagnetic interference(EMI) shielding polymer composites. Among the plentiful structures, the asymmetric structures are currently a hot spot, principally categorizing into multi-layered, porous, fibrous, and segregated asymmetric structures, which endows the high EMI shielding performance for polymer composites incorporated with magnetic, conductive, and/or dielectric micro/nano-fillers, due to the “absorption-reflection-reabsorption” shielding mechanism. Therefore, this review provides the retrospection and summary of the efforts with respect to abundant asymmetric structures and multifunctional micro/nano-fillers for enhancing EMI shielding properties, which is conducive to the booming development of polymeric EMI shielding materials for the promising prospect in modern electronics and 5-generation(5G) technology.

关键词： Asymmetric structure Microano functional filler Polymer composite Electromagnetic interference shielding

Call for knowledge systematization:An example from lithium ion batteries recycling

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Journal of Energy Chemistry 2024年第7期94卷 169-170页

作者： Yun Zhao Baohua Li Institute of materials research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina

Scientific research is one of the primary ways to drive human civilization *** research institutions and researchers worldwide are dedicated to exploring the unknown,resulting in a flood of research findings[1].For instance,Web of Science alone collects over 10,000 academic papers on a daily *** each research field typically has around 10%of review articles,these mainly focus on a limited portion of the subject,failing to provide a comprehensive and real-time updated *** a result,researchers or students in a particular field may spend several months,or even longer,comprehending the state of research that has developed over just a few *** lack of systematic background often leads to redundant or similar studies,which is highly detrimental to the progress of science and technology.

关键词： lithium typically spend

Crystallization of RE_(2)(OH)_(2)CO_(3)SO_(4)·nH_(2)O as a new family of layered hydroxides(RE=Gd-Lu lanthanides and Y),derivation of RE_(2)O_(2)SO_(4),photoluminescence and optical thermometry

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Journal of Rare Earths 2024年第8期42卷 1496-1506,I0003页

作者： Fan Li Zhenqi Song Zhiyuan Pan Sihan Feng Qi Zhu Ji-Guang Li Key Laboratory for Anisotropy and Texture of materials(Ministry of Education) School of Materials Science and EngineeringNorheastern UniversityShenyang110819China research center for Functional materials National Institute for Materials ScienceTSsukuboaIbaraki3050044Japan

Layered rare-earth hydroxides(LREHs) draw wide research interest because of their peculiar crystal structure,rich interlayer chemistry and abundant functionality of the RE element,but are limited to the two categories of RE_(2)(OH)_(5)A·nH_(2)O(A:typical of Cl^(-)or NO_(3)^(-)) and RE_(2)(OH)_(4)SO_(4)·nH_(2)*** the other hand,rare-earth oxysulfates(RE_(2)O_(2)SO_(4)) have attracted attention due to their properties of large-capacity oxygen storage,low-temperature magnetism and luminescence,but their preparation procedure mostly involves toxic SO_(x) gases and/or complicated *** this work,RE_(2)(OH)_(2)CO_(3)SO_(4)·nH_(2)O as a new family of LREHs(RE=Gd-Lu lanthanides and Y) were produced via hydrothermal reaction,from which phase-pure RE_(2)O_(2)SO_(4) was derived via subsequent annealing at 800℃ in air without the involvement of SO_(x),The compounds were thoroughly characterized to reveal the intrinsic influence of lanthanide contraction(RE^(3+) radius) on crystal structure,thermal behavior(dehydroxylation/decarbonation/desulfurization),vibrational property and crystallite *** analyzing the photoluminescence of Eu^(3+) and Sm^(3+)in the Gd_(2)O_(2)SO_(4) typical host it is found that the 617 nm(Eu^(3+),λ_(ex)=275 nm) and 608 nm(Sm^(3+),λ_(ex)=407 nm) main emissions can retain as high as ^(7)9.6% and 85.5%of their room-temperature intensities at 423 K,with activation energies of ~0.19 and 0.21 eV for thermal quenching,*** also indicates that both the phosphors have the potential for optical temperature sensing via the fluorescence intensity ratio(FIR) technology,whose maximum relative sensitivity reaches ^(2).70%/K for Eu^(3+)and 1.73%/K for Sm^(3+) at 298 K.

关键词： Layered hydroxide RE_(2)O_(2)SO_(4) Luminescence Optical temperature sensing Rare earths

Precise phase adjustment and antibacterial property of copper sulfide particles in confined mesoporous silica nanoreactor

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Particuology 2024年第2期85卷 113-121页

作者： Shiyu Xu Jinyong Wu Zhongzhen Ren Dechao Niu Low Dimensional materials Chemistry Laboratory Key Laboratory for Ultrafine Materials of Ministry of EducationFrontier Science Center of the Materials Biology and Dynamic ChemistryShanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Bacteria-caused wound infection greatly threatens human health,thus developing an efficient and safe antibacterial agent without drug resistance is still a great ***,a confined vulcanization strategy is proposed to construct copper sulfides-loaded dual-mesoporous silica nanospheres(Cux-Sy@DMSNs)with various crystal phases for reactive oxygen species(ROS)-mediated and photothermal antibacterial *** the pore confinement of DMSNs,the crystal phases of copper sulfides including CuS,Cu_(9)S_(5)and Cui.96S can be easily controlled by changing the vulcanization *** relationships between the crystal phases and photothermal properties as well as peroxidase-like activity of copper sulfides were systematically *** show that the obtained CuS@DMSNs exhibited higher photothermal ability with remarkable photothermal conversion efficiency of 36.86%in the second near-infrared region(NIR-II)and better peroxidase-like activity,compared to those of Cu_(9)S_(5)@DMSNs and Cu_(1.96)S@*** a result,the in vitro experiments showed the good antibacterial effect against both gram-negative *** and gram-positive *** under 1064 nm laser irradiation and the presence of H_(2)O_(2).Besides,the CCK-8 assay indicated that CuS@p-DMSNs have minimal cytotoxicity against normal human umbilical vein endothelial cells at the ranged ***,the resultant CuS@p-DMSNs could act as a promising antibacterial agent for deep wound bacterial infection treatment.

关键词： Copper sulfides Mesoporous silica Photothermal Reactive oxygen species Antibacterial agent