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Tracking lithiation with transmission electron microscopy

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Science China Chemistry 2024年第1期67卷 291-311页

作者： Xincheng Lei Jianxiong Zhao Jiayi Wang Dong Su Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China South China Academy of Advanced Optoelectronics&International Academy of Optoelectronics at Zhaoqing South China Normal UniversityGuangzhou 510006China

Li-ion batteries(LIBs)have dominated energy-storage techniques for portable electronic devices and electric cars,and are expanding their territory into the large-scale energy *** energy storage of LIBs is realized by the reversible shuttle of lithium ions between *** is essential to track the lithium diffusion and obtain a profound insight into the lithiation mechanism during the work cycle of *** electron microscopy(tem)is a powerful tool for the structural characterization,which can provide the information about the lithiation at the atomic *** this review,we summarize the research frontiers of tem applications on *** introduce the techniques for the direct observation of Li species in LIB-related ***,the application of cryo-tem is ***,in-situ tem technique is further discussed since it shows great advantages in studying the dynamical structure changes of *** perspectives and strategies in this review offer feasible guidance for researchers to further improve the performance of LIBs.

关键词： lithium-ion battery electrode materials transmission electron microscopy cryo-tem in-situ tem

In-situ construction of a Mg-modified interface to guide uniform lithium deposition for stable all-solid-state batteries

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Journal of Energy Chemistry 2021年第4期30卷 272-278页

作者： Tiefeng Liu Jiale Zheng Hualiang Hu Ouwei Sheng Zhijin Ju Gongxun Lu Yujing Liu Jianwei Nai Yao Wang Wenkui Zhang Xinyong Tao College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014ZhejiangChina

Uniform lithium(Li)deposition in all-solid-state Li metal batteries is greatly influenced by the anode/electrolyte ***,a Mg-modified interface was constructed via the simple in-situ electrochemical reduction of Mg^(2+)from Mg(TFSI)_(2) in polyethylene oxide(PEO)and a Li bis(trifluoromethane)sulfoni mide(Li TFSI)*** confirmed by cryogenic transmission electron microscopy,the anode/electrolyte interface exhibited hybrids consisting of crystalline Mg,Li_(2)O,and Li dots embedded in an amorphous polymer *** crystalline Mg dots guided the uniform Li nucleation and growth,inducing a smoother anode/electrolyte interface compared with the pristine *** 1 wt%Mg(TFSI)_(2) in the PEO-Li TFSI electrolyte,the Mg-modified electrolyte enabled the Li/Li symmetric cells with cycling performance of over 1700 and 1400 h at current densities of 0.1 and 0.2 m A cm^(-2),***,the full LFP/Li cells using the novel Mg-modified electrolyte delivered a cycling lifespan of over 450 cycles with negligible capacity loss.

关键词： Li metal PEO electrolyte Mg-modified interface Li dendrite cryo-tem

In situ transmission electron microscopy and artificial intelligence enabled data analytics for energy materials

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Journal of Energy Chemistry 2022年第5期31卷 454-493页

作者： Hongkui Zheng Xiner Lu Kai He Department of Materials Science and Engineering Clemson UniversityClemson 29634USA

Energy materials are vital to energy conversion and storage devices that make renewable resources viable for electrification technologies. In situ transmission electron microscopy(tem) is a powerful approach to characterize the dynamic evolution of material structure, morphology, and chemistry at the atomic scale in real time and in operando. In this review, recent advancements of in situ tem techniques for studying energy materials, including catalysts, batteries, photovoltaics, and thermoelectrics, are systematically discussed and summarized. The topics include a broad range of material transformations that are in situ stimulated by heating, biasing, lighting, electron-beam illuminating, and cryocooling under vacuum, liquid, or gas environments within tem, as well as the mechanistic understanding of the associated solid-solid, solid-liquid, and solid-gas reactions elucidated by in situ tem examination and operando measurements. Special focus is also put on the emerging progress of artificial intelligence enabled microscopy data analytics, including machine learning enhanced tools for retrieving useful information from massive tem imaging, diffraction, and spectroscopy datasets, highlighting its merits and potential for automated in situ tem experimentation and analysis. Finally, the pressing challenges and future perspectives on in situ tem study for energy-related materials are discussed.

关键词： In situ tem cryo-tem Energy materials Batteries Catalysts Photovoltaic Thermoelectric Artificial intelligence Machine learning

C_(12)EO_4与氨丙基三乙氧基硅烷水溶液自组装和流变性研究(英文)

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化学学报 2013年第8期71卷 1129-1135页

作者：郭红王栋董姝丽窦盈莹宋爱新郝京诚山东大学胶体与界面化学教育部重点实验室济南250100

研究了3-氨丙基三乙氧基硅烷(APTES)和非离子表面活性剂十二烷基聚氧乙烯(C12EO4)水溶液的相行为、溶液自聚集作用和流变性,小角度X-射线散射(SAXS)、低温透射电子显微镜(cryo-tem)和氘谱核磁共振(2H NMR)测定确定了溶液中聚集体结构,... 详细信息

研究了3-氨丙基三乙氧基硅烷(APTES)和非离子表面活性剂十二烷基聚氧乙烯(C12EO4)水溶液的相行为、溶液自聚集作用和流变性,小角度X-射线散射(SAXS)、低温透射电子显微镜(cryo-tem)和氘谱核磁共振(2H NMR)测定确定了溶液中聚集体结构,测定了聚集体混合物溶液的流变性质.结果表明:随着溶液混合物组分的变化,溶液聚集体结构发生了改变,在Lα相区内,恒定C12EO4浓度,随着APTES浓度增加聚集体结构由高曲率聚集体转变为低曲率的层状结构;而在恒定APTES浓度时,随着C12EO4增加,Lα相由低粘弹性的囊泡溶液转变为粘弹性极高的密堆积囊泡和平面层状结构共存的类凝胶相,溶液聚集体结构和结构转变是由于APTES水解产物插入至C12EO4胶束引起的.非离子表面活性剂和氨基硅烷混合物溶液相结构及结构转变的新结果对于完全理解该类混合物的实际应用,特别是作为模板合成硅材料的应用具有重要理论意义.

关键词：相行为非离子表面活性剂氨基硅氧烷流变性 cryo-tem

DNA与非离子表面活性剂复配体系水溶液聚集行为

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科学通报 2017年第6期62卷 606-615页

作者：王丽焕张琪郝京诚山东大学胶体与界面化学教育部重点实验室济南250100

自组装构建DNA的纳米复合物以提高其基因治疗效果,是目前化学、生物和医药学交叉领域的一个研究热点.本文研究了非离子表面活性剂十二烷基聚四氧乙烯醚(C_(12)EO_4)与DNA之间弱相互作用构筑的复配体系溶液聚集体,探讨了复配溶液聚集体... 详细信息

自组装构建DNA的纳米复合物以提高其基因治疗效果,是目前化学、生物和医药学交叉领域的一个研究热点.本文研究了非离子表面活性剂十二烷基聚四氧乙烯醚(C_(12)EO_4)与DNA之间弱相互作用构筑的复配体系溶液聚集体,探讨了复配溶液聚集体的组装结构、相结构转变与性能.通过温度改变控制DNA与C_(12)EO_4相互作用过程,确定了复配体系溶液聚集体结构的可控转变,建立了一种可控的组装方法.研究结果对DNA与表面活性剂复配溶液聚集体的性质与结构的组装规律具有重要意义.

关键词： DNA 非离子表面活性剂弱相互作用层状相 cryo-tem

An Investigation of the Self-Assembly of Meso-Tetra（4-Sulfonatophenyl）porphyrin

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An Investigation of the Self-Assembly of Meso-Tetra（4-Sulfo...

Zn2+离子诱导的囊泡相模板电沉积合成锌纳米颗粒

2013年全国高分子学术论文报告会

作者： Javoris Hollingswortha Allison J.Richardb Graca H.Vicenteb Paul Russob Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Polymer Physics Department of Chemistry and Macromolecular Studies Group Louisiana State University

＜正＞The self-assembly of meso-tetra（4-sulfonatophenyl）porphyrin（H 2 TPPS 4 - ） in aqueous solutions was investigated as a function of pH,concentration,time,ionic strength,and solution preparation（either from dilution of a freshly prepared 2mM stock or by direct preparation of μM solution concentrations） using a combination of complementary analytical ***-vis and

关键词： water-soluble porphyrin aggregation SAXS AUC cryo-tem

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Zn2+离子诱导的囊泡相模板电沉积合成锌纳米颗粒

作者：高岳山东大学

学位级别：硕士

金属及其氧化物形成的纳米结构,具有新颖的光学、电学、磁学和化学性质,因此在生产生活中有诸多潜在的应用,而合成这些纳米结构已成为近年来研究的热点。以表面活性剂有序聚集体作为模板,通过电化学方法合成纳米材料的方法,条件温和,可... 详细信息

金属及其氧化物形成的纳米结构,具有新颖的光学、电学、磁学和化学性质,因此在生产生活中有诸多潜在的应用,而合成这些纳米结构已成为近年来研究的热点。以表面活性剂有序聚集体作为模板,通过电化学方法合成纳米材料的方法,条件温和,可控性强,应用广泛。本论文从以下三个方面详细的研究了以金属离子配位囊泡相为模板,通过电沉积合成锌纳米颗粒的方法,及相关应用: 1、不同链长氧化胺与月桂酸锌复配体系的研究: 体系一:月桂酸锌([CH(CH)COO]Zn)/十四烷基二甲基氧胺(CDMAO) 向100mM的十四烷基二甲基氧胺(CDMAO)中加入月桂酸锌[CH(CH)COO]Zn)构筑了表面活性剂复配体系;体系二:月桂酸锌[CH(CH)COO]Zn)/十六烷基二甲基氧胺(CDMAO) 作为对比,向100mM的十四烷基二甲基氧胺(CDMAO)中加入月桂酸锌[CH(CH)COO]Zn),构筑了表面活性剂复配体系。利用电导率法初步确定了两个体系的相图。通过偏光显微镜(Polarizing-microscopy)、透射电子显微镜(tem)、低温透射电镜(cryo-tem)等方法对其相行为进行了表征。 2、以两个复配体系的表面活性剂溶液为电解质,通过电化学沉积的方法,在氧化铟锡电极上沉积锌单质。系统地研究了温度、表面活性剂配比、直流电流密度以及氧化胺表面活性剂碳氢链长度对沉积单质形貌的影响。通过扫描电子显微镜(SEM)观察表明:以上的几项实验条件都会显著影响沉积形貌(平均粒径和分散性),尤其是当以囊泡相为模板时,可以得到粒径较小且单分散的纳米颗粒。利用金属离子配位的囊泡相,通过电沉积方制备金属纳米材料,与传统的原料-模板模型方法所得到的纳米材料是完全不同的。 3、以制备的Zn@ITO为原料,通过电化学表面氧化的方法,制备了ZnO@ITO纳米结构,并通过SEM观察,初步探索了通电时间对产品形貌的影响和形成机理。

关键词：表面活性剂电化学沉积锌纳米颗粒囊泡 SEM cryo-tem