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A review of in-situ high-temperature characterizations for understanding the processes in metallurgical engineering

International Journal of Minerals, Metallurgy and Materials 2024年第11期31卷 2327-2344页

作者： Zhao, Yifan Li, Zhiyuan Li, Shijie song, weili Jiao, Shuqiang Institute of Advanced Structure Technology Beijing Institute of Technology Beijing China State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing China

For the rational manipulation of the production quality of high-temperature metallurgical engineering, there are many challenges in understanding the processes involved because of the black box chemical/electrochemical reactors. To overcome this issue, various in-situ characterization methods have been recently developed to analyze the interactions between the composition, microstructure, and solid–liquid interface of high-temperature electrochemical electrodes and molten salts. In this review, recent progress of in-situ high-temperature characterization techniques is discussed to summarize the advances in understanding the processes in metallurgical engineering. In-situ high-temperature technologies and analytical methods mainly include synchrotron X-ray diffraction (s-XRD), laser scanning confocal microscopy, and X-ray computed microtomography (X-ray μ-CT), which are important platforms for analyzing the structure and morphology of the electrodes to reveal the complexity and variability of their interfaces. In addition, laser-induced breakdown spectroscopy, high-temperature Raman spectroscopy, and ultraviolet–visible absorption spectroscopy provide microscale characterizations of the composition and structure of molten salts. More importantly, the combination of X-ray μ-CT and s-XRD techniques enables the investigation of the chemical reaction mechanisms at the two-phase interface. Therefore, these in-situ methods are essential for analyzing the chemical/electrochemical kinetics of high-temperature reaction processes and establishing the theoretical principles for the efficient and stable operation of chemical/electrochemical metallurgical processes.

关键词： in-situ characterization methods high-temperature electrochemistry electrodes molten salts interfacial reaction

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A review of in-situ high-temperature characterizations for understanding the processes in metallurgical engineering

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International Journal of Minerals,Metallurgy and Materials 2024年第11期 2327-2344页

作者： Yifan Zhao Zhiyuan Li Shijie Li weili song Shuqiang Jiao Institute of Advanced Structure Technology Beijing Institute of Technology State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

For the rational manipulation of the production quality of high-temperature metallurgical engineering, there are many challenges in understanding the processes involved because of the black box chemical/electrochemical reactors. To overcome this issue, various in-situ characterization methods have been recently developed to analyze the interactions between the composition, microstructure,and solid–liquid interface of high-temperature electrochemical electrodes and molten salts. In this review, recent progress of in-situ hightemperature characterization techniques is discussed to summarize the advances in understanding the processes in metallurgical engineering. In-situ high-temperature technologies and analytical methods mainly include synchrotron X-ray diffraction(s-XRD), laser scanning confocal microscopy, and X-ray computed microtomography(X-ray μ-CT), which are important platforms for analyzing the structure and morphology of the electrodes to reveal the complexity and variability of their interfaces. In addition, laser-induced breakdown spectroscopy, high-temperature Raman spectroscopy, and ultraviolet–visible absorption spectroscopy provide microscale characterizations of the composition and structure of molten salts. More importantly, the combination of X-ray μ-CT and s-XRD techniques enables the investigation of the chemical reaction mechanisms at the two-phase interface. Therefore, these in-situ methods are essential for analyzing the chemical/electrochemical kinetics of high-temperature reaction processes and establishing the theoretical principles for the efficient and stable operation of chemical/electrochemical metallurgical processes.

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工作场所空气中草酸二甲酯和草酸二乙酯同时测定的高效液相色谱法

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中华劳动卫生职业病杂志 2024年第3期42卷 199-202页

作者：陈志亮王敏江金凤宋为丽武汉市职业病防治院卫生检验科武汉430015

目的建立工作场所空气中草酸二甲酯(DMO)和草酸二乙酯(DEO)同时测定的高效液相色谱检测方法。方法于2022年1月至2023年1月, 空气样品采用硅胶管采集, 乙腈洗脱解吸, 经C18色谱柱分离, 二极管阵列检测器检测, 在210 nm波长下, 以保留时... 详细信息

目的建立工作场所空气中草酸二甲酯(DMO)和草酸二乙酯(DEO)同时测定的高效液相色谱检测方法。方法于2022年1月至2023年1月, 空气样品采用硅胶管采集, 乙腈洗脱解吸, 经C18色谱柱分离, 二极管阵列检测器检测, 在210 nm波长下, 以保留时间定性, 峰面积定量。结果 DMO和DEO测定方法的线性关系良好, r>0.999。DMO和DEO的方法检出限分别为0.39 μg/ml、0.52 μg/ml, 方法定量下限分别为1.28 μg/ml、1.72 μg/ml。DMO和DEO的平均解吸效率分别为82.40%~92.72%、94.13%~97.69%, 批内精密度分别为1.87%~6.18%、2.25%~3.31%, 批间精密度分别为3.29%~5.73%、1.38%~2.94%。平均采样效率均为100%。DMO穿透容量为37.61 mg(200 mg固体吸附剂), DEO穿透容量为>28.11 mg(200 mg固体吸附剂)。在4 ℃条件下样品至少可以保存7 d。结论该方法操作简便、实用性强, 各项指标均满足规范要求, 适用于工作场所空气中DMO和DEO的同时测定。

关键词：工作场所草酸二甲酯草酸二乙酯高效液相色谱法空气

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Double carbon decorated lithium titanate as anode material with high rate performance for lithium-ion batteries

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Progress in Natural Science:Materials International 2016年第3期26卷 283-288页

作者： Haifang Ni weili song Lizhen Fan Institute of Advanced Materials and Technology University of Science and Technology Beijing

Spinel lithium titanate(Li;Ti;O;) has the advantages of structural stability, however it suffers the disadvantages of low lithium-ion diffusion coefficient as well as low conductivity. In order to solve issues,we reported a simple method to prepare carbon-coated Li;Ti;O;/CNTs(C@Li;Ti;O;/CNTs) using stearic acid as surfactant and carbon source to prepare carbon coated nanosized particles. The obtained Li;Ti;O;particles of 100 nm in size are coated with the carbon layers pyrolyzed from stearic acid and dispersed in CNTs matrix homogeneously. These results show that the synthesized C@Li;Ti;O;/CNTs material used as anode materials for lithium ion batteries, presenting a better high-rate performance(147 m Ahg;at20 C). The key factors affecting the high-rate properties of the C@Li;Ti;O;/CNTs composite may be related to the synergistic effects of the CNTs matrix and the carbon- coating layers with conductivity enhancement. Additionally, the amorphous carbon coating is an effective route to ameliorate the rate capability of Li;Ti;O;/CNTs.

关键词： Lithium titanate Carbon nanotubes Lithium-ion batteries Anode materials

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噬菌体内溶素在食品中的应用进展

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中国兽医科学 2024年第6期54卷 845-850页

作者：赵学慧曹青宋维丽苟惠天薛惠文甘肃农业大学动物医学院甘肃兰州730070 临洮县龙门镇畜牧兽医站甘肃定西730500

耐药性细菌毒株的出现给食品安全领域带来严重的威胁及挑战。噬菌体内溶素是双链DNA噬菌体在复制后期产生的一种水解酶,可以裂解细菌细胞壁的肽聚糖成分。在控制食源性致病菌时噬菌体内溶素的应用不仅安全、无残留,而且不易产生抗性。... 详细信息

耐药性细菌毒株的出现给食品安全领域带来严重的威胁及挑战。噬菌体内溶素是双链DNA噬菌体在复制后期产生的一种水解酶,可以裂解细菌细胞壁的肽聚糖成分。在控制食源性致病菌时噬菌体内溶素的应用不仅安全、无残留,而且不易产生抗性。系统介绍了噬菌体内溶素的相关结构特点及裂解过程,综述了噬菌体内溶素在控制食源性致病菌污染方面最新的研究进展及应用情况,并对未来在食品安全方面的应用进行了展望。

关键词：内溶素噬菌体食源性致病菌食品安全抗生素

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Mechano-electrochemical perspectives on flexible lithium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2022年第5期29卷 1019-1036页

作者： Na Li Shuangquan Yang Haosen Chen Shuqiang Jiao 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 State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

With the advent of flexible/wearable electronic devices,flexible lithium-ion batteries(LIBs)have attracted significant attention as optimal power source *** LIBs with good flexibility,mechanical stability,and high energy density are still an enormous *** recent years,many complex and diverse design methods for flexible LIBs have been *** design and evaluation of ideal flexible LIBs must take into consideration both mechanical and electrochemical *** this review,the recent progress and challenges of flexible LIBs are reviewed from a mechano-electrochemical *** recent progress in flexible LIB design is addressed concerning flexible material and configuration *** mechanical and electrochemical evaluations of flexible LIBs are also ***,mechano-electrochemical perspectives for the future direction of flexible LIBs are also ***,the relationship between mechanical loading and the electrode process is analyzed from a mechano-electrochemical *** evaluation of flexible LIBs should be based on mechano-electrochemical *** and perspectives are of great significance to the design and practicality of flexible LIBs,which is contributed to bridging the gap between laboratory exploration and practical applications.

关键词： flexible lithium-ion batteries flexible materials structural design mechanical and electrochemical coupling

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Thickness evolution of commercial Li-ion pouch cells with siliconbased composite anodes and NCA cathodes

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Science China(Technological Sciences) 2021年第1期64卷 83-90页

作者： ZHANG XingYu HE Jie ZHOU Jiang CHEN HaoSen song weili FANG DaiNing State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory of Explosion Science and Technology Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China Lishen Research Institute Tianjin Lishen Battery Joint-stock Co.Ltd.Tianjin 300384China State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking UniversityBeijing 100871China

It is significant to monitor the thickness change of commercial Li-ion pouch cells that are assembled from Si-based electrodes and layered cathodes since the volume variation is critically linked with kinetic reaction mechanism and chemomechanical degradation. In this work, the single-point and full-field measurements are conducted on the thickness evolution of Si Ox/Cgraphite/lithium nickel-cobalt-aluminum oxide(Si Ox-G/NCA) batteries. It is found that an abnormal overshoot that has been rarely observed in the previous studies appears at the beginning of discharge, which is believed to be the combined results between the rapid expansion of NCA and the contraction of graphite related to the state of charge(SOC). Compared with the results of single-point measurement, the spatial displacement distribution obtained from three-dimensional(3D) scanning suggests the full-field thickness evolution of the entire cell scale, which is more feasible and efficient to provide full-field information for supporting pouch cell design and pack integration.

关键词： thickness change 3D scanning silicon-based anode NCA cathode lithium-ion battery

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Preparation and properties of ZnO nano-whiskers

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Science China(Technological Sciences) 2008年第9期51卷 1433-1438页

作者： SHI XiaoLing CAO MaoSheng ZHAO YuNa song weili RONG JiLi School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

By a novel controlled combustion synthesis method, a large amount of ZnO nano-whiskers with different morphologies like nanotetrapods, long-leg nanotetrapod and multipods, were prepared without any catalysts and additives in open air at high temperature. Their morphologies, structures and optical properties were in-vestigated by using SEM, XRD and PL spectrum. The possible growth mechanisms on the ZnO nano-whiskers were proposed in this paper.

关键词： ZnO nano-whiskers combustion synthesis method

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Multi-field coupled color-changing devices and structures

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Science China(Technological Sciences) 2019年第6期62卷 1065-1066页

作者： BAO YinHua HAN Yu song weili CHEN HaoSen FANG DaiNing State Key Laboratory for Turbulence and Complex System College of Engineering Peking University Beijing 100871 China Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China

Multi-field coupling phenomenon plays a significant role in the design and fabrication of color-changing devices. By introducing external fields, such as strain/stress, electric, thermal, or chemical fields, these dev... 详细信息

关键词： Multi-field plays a significant optical tunability

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Electrochemomechanical coupled behaviors of deformation and failure in electrode materials for lithium-ion batteries

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Science China(Technological Sciences) 2019年第8期62卷 1277-1296页

作者： LIANG HuanZi ZHANG XingYu YANG Le WU YiKun CHEN HaoSen song weili FANG DaiNing State Key Laboratory of Explosion Science and Technology Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China State Key Laboratory of Mechanics and Control of Mechanical Structures Interdisciplinary Research Institute of Aeronautics and Astronautics College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China

The growing demands of lithium-ion batteries with high energy density motivate the development of high-capacity electrode materials. The critical issue in the commercial application of these electrodes is electrochemomechanical degradation accompanied with the large volume change, built-in stress, and fracture during lithiation and delithiation. The strong and complex couplings between mechanics and electrochemistry have been extensively studied in recent years. The multi-directional couplings, e.g.,(de)lithiation-induced effects and stress-regulated effects, require cooperation in the interdisciplinary fields and advance the theoretical and computational models. In this review, we focus on the recent work with topics in the electrochemomechanical couplings of deformation and fracture of conventional and alloying electrodes through experimental characterization, theoretical and computational models. Based on the point of view from mechanics, the strategies for alleviating the degradation are also discussed, with particular perspectives for component-interaction patterns in the composite electrodes. With interdisciplinary principles, comprehensive understanding of the electrochemomechanical coupled mechanism is expected to provide feasible solutions for low-cost, high-capacity, high-safety and durable electrodes for lithium-ion batteries.

关键词： electrochemomechanical coupling deformation theory fracture electrode materials lithium-ion battery

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