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Charactering and optimizing cathode electrolytes interface for advanced rechargeable batteries:Promises and challenges

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Green Energy & Environment 2022年第4期7卷 606-635页

作者： zhongyang zhang Xinran Wang Ying Bai Chuan Wu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science&EngineeringBeijing Institute of TechnologyBeijingChina Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing314019China

With the advancement of secondary batteries,interfacial properties of electrode materials have been recognized as essential factors to their electrochemical performance.However,the majority of investigations are devoted into advanced electrode materials synthesis,while there is insufficient attention paid to regulate their interfaces.In this regard,the solid electrolyte interphase(SEI)at anode part has been studied for 40 years,already achieving remarkable outcomes on improving the stability of anode candidates.Unfortunately,the study on the cathode electrolyte interfaces(CEI)remains in infancy,which constitutes a potential restriction to the capacity contribution,stability and safety of cathodes.In fact,the native CEI generally possesses unfavorable characteristics against structural and compositional stability that requires demanding optimization strategies.Meanwhile,an in-depth understanding of the CEI is of great significance to guide the optimization principles in terms of composition,structure,growth mechanism,and electrochemical properties.In this literature,recent progress and advances of the CEI characterization methods and optimization protocols are summarized,and meanwhile the mutually-reinforced mechanisms between detection and modification are explained.The criteria and the potential development of the CEI characterization are proposed with insights of novel optimization directions.

关键词： Cathode electrolyte interface Secondary battery Characterization methods In situ/operando Synchrotron radiation

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Base placement optimization of a mobile hybrid machining robot by stiffness analysis considering reachability and nonsingularity constraints

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Chinese Journal of Aeronautics 2023年第11期36卷 398-416页

作者： zhongyang zhang Juliang XIAO Haitao LIU Tian HUANG Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin UniversityTianjin 300340China School of Engineering The University of WarwickCoventry CV47ALUK

The mobile hybrid machining robot has a very bright application prospect in the field of high-efficiency and high-precision machining of large aerospace structures.However,an inappropriate base placement may make the robot encounter a singular configuration,or even fail to complete the entire machining task due to unreachability.In addition to considering the two constraints of reachability and non-singularity,this paper also optimizes the robot base placement with stiffness as the goal to improve the machining quality.First of all,starting from the structure of the robot,the reachability and nonsingularity constraints are transformed into a simple geometric constraint imposed on the base placement:feasible base placement area.Then,genetic algorithm is used to search for the base placement with near optimal stiffness(near optimal base placement for short)in the feasible base placement area.Finally,multiple controlled experiments were carried out by taking the milling of a protuberance on the spacecraft cabin as an example.It is found that the calculated optimal base placement meets all the constraints and that the machining quality was indeed improved.In addition,compared with simple genetic algorithm,it is proved that the feasible base placement area method can shorten the running time of the whole program.

关键词： Aerospace industry Base placement optimization Hybrid machining robot Mobile robot Robot application Singularity avoidance Stiffness optimization

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Emerging polymeric biomaterials and manufacturing techniques in regenerative medicine

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Aggregate 2022年第5期3卷 59-81页

作者： Dan Xia Jiatian Chen zhongyang zhang Mingdong Dong Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjinChina Interdisciplinary Nanoscience Center(iNANO) Aarhus UniversityAarhusDenmark

The current demand for patients’organ and tissue repair and regeneration is continually increasing,where autologous or allograft is the golden standard treatment in the clinic.However,due to the shortage of donors,mismatched size and modality,functional loss of the donor region,possible immune rejection,and so forth,the application of auto-/allo-grafts is frequently hindered in many cases.In order to solve these problems,artificial constructs structurally and functionally imitating the extracellular matrix have been developed as substitutes to promoting cell attachment,proliferation,and differentiation,and ultimately forming functional tissues or organs for better tissue regeneration.Particularly,polymeric materials have been widely utilized in regenerative medicine because of their ease of manufacturing,flexibility,biocompatibility,as well as good mechanical,chemical,and thermal properties.This review presents a comprehensive overview of a variety of polymeric materials,their fabrication methods as well applications in regenerative medicine.Finally,we discussed the future challenges and perspectives in the development and clinical transformation of polymeric biomaterials.

关键词： polymeric biomaterials utilized

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Cross‑sectional Exploration of the Relationship Between Glutamate Abnormalities and Tic Disorder Severity Using Proton Magnetic Resonance Spectroscopy

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Phenomics 2023年第2期3卷 138-147页

作者： Juanjuan Hao Xin zhang Ying Liu zhongyang zhang Keyu Jiang Xiao‑Yong zhang Min Wu Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine 1665 Kongjiang RoadShanghai 200092People’s Republic of China Institute of Science and Technology for Brain‑Inspired Intelligence Fudan UniversityShanghai 200433People’s Republic of China School of Medicine Shaoxing University900 Chengnan RoadShaoxing 312000People’s Republic of China Key Laboratory of Computational Neuroscience and Brain‑Inspired Intelligence(Fudan University) Ministry of EducationShanghai 200433People’s Republic of China

Glutamate(Glu)has been reported to be closely related to the pathophysiology of Tic Disorders(TD).By using proton mag-netic resonance spectroscopy(1H-MRS),we aimed to investigate the relationship between in vivo Glu levels and the severity of TD.We performed a cross-sectional study in medication-free patients with TD and healthy controls aged between 5 and 13 years using 1H-MRS at 3 T.First,we measured the Glu levels in both patients and controls and observed the difference in subgroups,including mild TD patients and moderate TD patients.We then examined the correlations between the Glu levels and clinical features of the patients.Finally,we assessed the diagnostic value of 1H-MRS and the influencing factors.Our results show that the Glu levels in the striatum of all patients with TD were not significantly different from those of the healthy controls.Subgroup analysis revealed that the Glu levels in the moderate TD group were higher than those in the mild TD group and healthy controls.The correlation analysis showed that Glu levels are strongly positive correlated with TD severity.The optimal cutoff value of Glu levels to differentiate mild tics from moderate tics was 1.244,with a sensitivity of 88.2%and a specificity of 94.7%.Multiple linear regression models revealed that the severity of TD is one of the important factors that affect Glu levels.We conclude that Glu levels are mainly associated with the severity of tics,thus it could serve as a key biomarker for TD classification.

关键词： Tic Disorders Magnetic resonance spectroscopy Glutamate levels Striatum

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城市电影“风物”修辞下的隐秘叙事--《在街上》“城市风物”叙事研究

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电影评介 2024年第2期 52-56页

作者：章龙张仲阳北京电影学院中国电影文化研究院

城市对于电影意味着什么?通常情况下,城市仅仅是电影叙事的发生空间,就如戏剧舞台上的布景一般,总是承担一种辅助的功能。然而,在建筑研究中,对“风物”的关注却为人们理解电影中的城市提供一种独特的视角。学者马援指出:“‘城市风物... 详细信息

城市对于电影意味着什么?通常情况下,城市仅仅是电影叙事的发生空间,就如戏剧舞台上的布景一般,总是承担一种辅助的功能。然而,在建筑研究中,对“风物”的关注却为人们理解电影中的城市提供一种独特的视角。学者马援指出:“‘城市风物’是打开一座城市历史文化意义的标签,它刻录着一座城市远古今朝的发展过程。城市风物是活在当下的历史,是时空叠加的沉积;它不是孤立的、无结构和无序的,而是被一串串联动的空间隐喻符号以历史的、文化的、语言的或是艺术的方式相互交织而凝结在一起。”

关键词：叙事研究戏剧舞台历史文化意义风物电影叙事活在当下隐喻符号

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用于生物医学应用的基于微藻的生物杂化材料的合理设计和开发

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Engineering 2023年第5期24卷 102-113,I0003页

作者： zhongyang zhang Yumeng Chen Lasse Hyldgaard Klausen Sebastian Amland Skaanvik Dan Wang Jianfeng Chen Mingdong Dong Interdisciplinary Nanoscience Center Aarhus UniversityAarhus DK-8000Denmark College of Biological Science and Agriculture Qiannan Normal University for NationalitiesTuyun 558000China State Key Laboratory of Organic–Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China

微藻是一种体积微小的真核生物,可通过叶绿素a的光合作用将二氧化碳转化为多种生物活性物质。在过去的十年中,有关活体微藻和其他生物相容性成分组成的生物杂化材料在解决许多医学难题中显示出巨大的潜力,如肿瘤治疗、组织重建和药物输... 详细信息

微藻是一种体积微小的真核生物,可通过叶绿素a的光合作用将二氧化碳转化为多种生物活性物质。在过去的十年中,有关活体微藻和其他生物相容性成分组成的生物杂化材料在解决许多医学难题中显示出巨大的潜力,如肿瘤治疗、组织重建和药物输送。固定在常规生物材料中的微藻可以长时间维持其光合活性从而在局部提供氧气,同时也可作为调节细胞活性的生物相容性界面材料。微藻的运动性还激发了生物杂交机器人的发展,其中药物分子可通过非共价键吸附结合至微藻表面,并通过精确控制其运动轨迹将药物输送到目标区域。此外,微藻的自发荧光、趋光性和生物质生产可以整合到具有多种功能的新型生物杂化材料的设计中;通过基因工程改造的微藻可以赋予生物杂交材料新的特性,如特异性细胞靶向能力和从藻类细胞中局部释放重组蛋白——这些技术技术有望促进微藻基生物杂交材料(MBBM)在多个生物医学领域的临床应用。本文总结了MBBM的制造、生理学和运动能力;然后,回顾了MBBM近年来在生物医学领域的典型应用报告;最后,对MBBM的挑战和未来前景进行了讨论。

关键词：药物输送生物医学应用医学难题未来前景运动轨迹自发荧光药物分子非共价键

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冷热冲击下纳米粒子改性硅橡胶/环氧树脂绝缘修复涂料耐电特性

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高电压技术 2024年第5期50卷 2207-2216页

作者：杨国清蒋超璐张中杨王德意西安理工大学电气工程学院西安710054

为解决现有绝缘修复材料在大范围温度波动时出现绝缘件剥落、二次开裂、电气失效等问题,研制了多种纳米粒子填充的硅橡胶/环氧树脂复合修复涂料,对比分析了冷热冲击循环前后修复涂料的粘合强度、电气性能和微观结构。结果表明:冷热冲击... 详细信息

为解决现有绝缘修复材料在大范围温度波动时出现绝缘件剥落、二次开裂、电气失效等问题,研制了多种纳米粒子填充的硅橡胶/环氧树脂复合修复涂料,对比分析了冷热冲击循环前后修复涂料的粘合强度、电气性能和微观结构。结果表明:冷热冲击会造成修复涂料分子主链断裂,产生低分子产物和氧化游离基团,导致涂料相对介电常数和介质损耗增大,击穿场强减小;而功能纳米母粒可提高界面结合能,阻碍聚合物分子的拉伸和扭转,使涂料具有相对稳定的化学结构,可防止冷热冲击下基体内局部劣化通道的延伸,从而有效抑制修复涂料耐电性能的下降;当玻璃纤维、纳米ZnO、SiO_(2)共混,填充量(质量分数)为16%时,涂料电气性能良好,且硅橡胶/环氧树脂复合修复涂料固化时间短,无溶胀现象发生,附着力良好,为设备绝缘快速修复提供可能。

关键词：冷热冲击绝缘修复纳米复合材料介电性能击穿特性

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混合固液锂离子电池的热失控行为研究

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储能科学与技术 2024年第1期13卷 48-56页

作者：靳欣张建茹王其钰张锐王碧童张中洋俞海龙禹习谦李泓中国科学院物理研究所北京100190

混合固液电解质锂离子电池是一种具有高能量密度、高安全性的储能器件,有望短期内实现产业化。本工作选择混合固液电解质(LATP和电解液)匹配高比容量活性材料(正极NCM811和负极C@SiO)为研究体系,采用绝热加速量热仪和气相色谱仪对全SOC... 详细信息

混合固液电解质锂离子电池是一种具有高能量密度、高安全性的储能器件,有望短期内实现产业化。本工作选择混合固液电解质(LATP和电解液)匹配高比容量活性材料(正极NCM811和负极C@SiO)为研究体系,采用绝热加速量热仪和气相色谱仪对全SOC及不同全寿命周期下混合固液电解质锂离子电池进行热失控模拟和产气组分分析,并通过超声检测仪分析不同寿命周期下电解液含量的变化情况。研究结果显示:该体系新鲜电池随荷电态的增加而热安全性降低,产气量增大,且可燃气体的占比会增加。随着循环容量的衰减,电池样品的热失控起始温度、最高产热速率以及产气量变化有所差异,在容量保持率为70%时热稳定性有所改善,结合超声分析结果推测与电解液转化成固态电解质有关。该工作初步探究了该体系电池的热失控行为,为后期内部机理解析和电池设计提供了支撑。

关键词：锂离子电池混合固液热失控全寿命周期

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Epitaxial growth and thermal-conductivity limit of singlecrystalline Bi2Se3/In2Se3 superlattices on mica

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Nano Research 2017年第1期10卷 247-254页

作者： Wuyang Ren Handong Li Lei Gao Yong Li zhongyang zhang Chengjia Long Haining Ji Xiaobin Niu Yuan Lin Zhiming Wang Institute ofFundamen tal and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 China State Key Laboratory of Electronic Thin Films and Integrated Devices School of Microelectronics and Solid-State Electronics University of Electronic Science and Technology of China Chengdu 610054 China

Thermal transport in superlattices is governed by various phonon-scattering processes. For extracting the phonon-scattering contribution of hetero-interfaces in chalcogenide superlattices, single-crystalline Bi2Se3/In2Se3 （BS/IS） superlattices with minimized defects are prepared on fluorophlogopite mica by molecular beam epitaxy. The cross-plane heat-conducting properties of the BS/IS superlattices are demonstrated to depend precisely on the period thicknesses and constituents of the superlattices, where a minimum in the thermal conductivity indicates a crossover from particle-like to wave-like phonon transport in the superlattices. The thermal-conductivity minimum of the BS/IS superlattices is nearly one order of magnitude lower than that of intrinsic BS film.

关键词： molecular beam epitaxy,Bi2Se3,In2Se3,superlattice,thermal conductivity

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Reversible conductivity recovery of highly sensitive flexible devices by water vapor

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npj Flexible Electronics 2018年第1期2卷 253-262页

作者： Yuting Wang Yingchun Su Zegao Wang zhongyang zhang Xiaojun Han Mingdong Dong Lifeng Cui Menglin Chen School of Environment and Civil Engineering Dongguan University of Technology523808 GuangdongChina Department of Engineering and Interdisciplinary Nanoscience Center Aarhus UniversityDK-8000 Aarhus CDenmark State Key Laboratory of Urban Water Resource and Environment School of Chemistry and Chemical EngineeringHarbin Institute of Technology92 West Da-Zhi Street150001 HarbinChina

With decreasing size of integrated circuits in wearable electronic devices,the circuit is more susceptible to aging or fracture problem,subsequently decreasing the transmission efficiency of electricity.Micro-healing represents a good approach to solve this problem.Herein,we report a water vapor method to repair microfiber-based electrodes by precise positioning and rapid healing at their original fracture sites.To realize this micro-level conducting healing,we utilize a bimaterial composed of polymeric microfibers as healing agents and electrically conductive species on its surface.This composite electrode shows a high-performance conductivity,great transparency,and ultra-flexibility.The transmittance of our electrode could reach up to 88 and 90%with a sheet resistance of 1 and 2.8Ωsq^(−1),respectively,which might be the best performance among Au-based materials as we know.Moreover,after tensile failure,water vapor is introduced to mediate heat transfer for the healing process,and within seconds the network electrode could be healed along with recovering of its resistance.The recovering process could be attributed to the combination of adhesion force and capillary force at this bimaterial interface.Finally,this functional network is fabricated as a wearable pressure/strain sensing device.It shows excellent stretchability and mechanical durability upon 1000 cycles.

关键词： wear conductivity electrode

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