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Advances of high-performance LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode materials and their precursor particles via co-precipitation process

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Particuology 2024年第3期86卷 67-85页

作者： Wenbiao Liang Yin Zhao Liyi Shi zhuyi wang Yi wang Meihong Zhang Shuai Yuan School of Materials Science and Engineering Shanghai UniversityShanghai200444China Research Center of Nanoscience and Nanotechnology Shanghai UniversityShanghai200444China Emerging Industries Institute Shanghai UniversityJiaxingZhejiang314006China

Layered LiNi_(1-x-y)Co_(x)M_(y)O_(2)(M=Mn or Al)is a promising cathode material for lithium-ion batteries due to its high specific capacity and acceptable manufacturing cost.However,the polycrystalline LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode material suffers from disordered orientation of primary particles and poor geometric symmetry of secondary particles,which severely hampers the migration of Lit ions.Furthermore,the resulting anisotropy accelerates the disintegration of the secondary particle structure,significantly affecting the electrochemical performance of the polycrystalline cathode.In spite of less grain boundary,the single-crystal LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathodes still suffer from severe microcracks generated by repeated planar gliding during cycling,which poses a great challenge to the cycling stability of single-crystal materials.It's worth noting that the microstructure of the cathode material is mainly inherited from its precursor.Therefore,it is necessary to deeply understand the influence of the microstructure of Ni_(1-x-y)Co_(x)M_(y)(OH)2 on the electrochemical properties of LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode materials,so as to optimize the production process of preparing high-performance cathode precursors.In this review,we summarize recent advances in the research and development of Ni-rich cathode precursor materials.Firstly,the challenges faced by the Ni-rich hydroxide precursor materials are presented,including the effect of primary particle morphology and arrangement on the electrochemical performance of cathode materials,the influence of secondary particle morphology on lithium insertion reactions in cathode,and the effect of particle size on the microcracking of single-crystal particles.Secondly,the presentation of the conventional co-precipitation reactor,the mechanism of precursor particle growth,and the influence of coprecipitation parameters are described in detail.Finally,the strategies are systematically discussed to solve the challenges of hydroxide precursors,such as the inno

关键词： Lithium-ion batteries Cathode materials Co-precipitation Ni-rich layered oxides Single crystal Precursor particles

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A cation-dipole-reinforced elastic polymer electrolyte enabling long-cycling quasi-solid-state lithium metal batteries

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Journal of Energy Chemistry 2022年第12期75卷 340-348,I0009页

作者： zhuyi wang Yiming wang Pan Zhai Preeyaporn Poldorn Siriporn Jungsuttiwong Shuai Yuan Research Centre of Nanoscience and Nanotechnology Shanghai UniversityShanghai 200444China Center for Organic Electronic and Alternative Energy Department of Chemistry and Center of Excellence for Innovation in ChemistryFaculty of ScienceUbon Ratchathani UniversityUbon Ratchathani 34190Thailand

The application of ionic liquids(IL)in polymer electrolytes represents a safer alternative to the currently used organic solvents in lithium batteries due to their nonflammability and thermal stability.However,as a plasticizer,it is generally agreed that the introduction of ionic liquid usually leads to a trade-off between ion transport and mechanical properties of polymer electrolyte.Here we report the synthesis of an IL-embedded polymer electrolyte with both high ionic conductivity(2.77×10^(-4)S cm^(-1)at room temperature)and excellent mechanical properties(high tensile strength up to 11.4 MPa and excellent stretchability of 387%elongation at break)achieved by strong ion–dipole interactions between polymer electrolyte components,which was unveiled by the DFT calculation.Moreover,this polymer electrolyte also exhibits nonflammability,good thermal stability and the ability to recover reversibly from applied stress,i.e.,excellent elasticity.This highly viscoelastic polymer electrolyte enables tight interfacial contact and good adaptability with electrodes for stable lithium stripping/plating for 2000 h under a current density of 0.1 mA cm^(-2).By coupling with this polymer electrolyte,the LiFePO_(4)/Li cells exhibit outstanding cycling stability at room temperature as well as the reliability under extreme environmental temperature or being abused.

关键词： Elastic polymer electrolyte Ion-dipole interactions High tensile strength Quasi-solid-state lithium battery Long cycling

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Ionic liquids for high performance lithium metal batteries

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Journal of Energy Chemistry 2021年第8期30卷 320-333,I0007页

作者： Kexin Liu zhuyi wang Liyi Shi Siriporn Jungsuttiwong Shuai Yuan School of Materials Science and Engineering Shanghai University200444 ShanghaiChina Research Centre of Nanoscience and Nanotechnology Shanghai University200444 ShanghaiChina Center for Organic Electronic and Alternative Energy Department of Chemistry and Center of Excellence for Innovation in ChemistryFaculty of ScienceUbon Ratchathani University34190 Ubon RatchathaniThailand Emerging Industries Institute Shanghai UniversityJiaxing 314006China

The pursuit of high energy density has promoted the development of high-performance lithium metal batteries.However,it faces a serious security problem.Ionic liquids have attracted great attention due to their high ionic conductivity,non-flammability,and the properties of promoting the formation of stable SEI films.Deeply understanding the problems existing in lithium metal batteries and the role of ionic liquids in them is of great significance for improving the performance of lithium metal batteries.This article reviews the effects of the molecular structure of ionic liquids on ionic conductivity,Li^(+)ion transference number,electrochemical stability window,and lithium metal anode/electrolyte interface,as well as the application of ionic liquids in Li-high voltage cathode batteries,Li-O_(2) batteries and Li-S batteries.The molecular design,composition and polymerization will be the main strategies for the future development of ionic liquid-based electrolytes for high performance lithium metal battery.

关键词： Ionic liquids Li+ion conduction Interface issues Lithium metal battery

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幼儿园数学教育中游戏玩具的设计研究

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玩具世界 2024年第3期 62-64页

作者：王珠怡江苏省南通市如东县锦绣幼儿园

在幼儿园教育中，数学教育是培养幼儿逻辑思维和抽象能力的重中之重。玩具作为幼儿教育的辅助工具，具有举足轻重的地位。如何通过合理的设计，将玩具融入幼儿园数学教育中，提升幼儿对数学的兴趣，培养其解决问题的能力，是当前幼儿教... 详细信息

在幼儿园教育中，数学教育是培养幼儿逻辑思维和抽象能力的重中之重。玩具作为幼儿教育的辅助工具，具有举足轻重的地位。如何通过合理的设计，将玩具融入幼儿园数学教育中，提升幼儿对数学的兴趣，培养其解决问题的能力，是当前幼儿教育领域需要关注的问题。文章分析玩具在幼儿园数学教育中的重要性，探讨幼儿园数学教育中游戏玩具设计的原则和策略，并设计相关游戏玩具方案，以期为幼儿教育工作者提供有益的参考。

关键词：幼儿园数学教育游戏玩具玩具设计

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Solvothermal Synthesis of TiO2/Bi2WOs Heterojunction Photocatalyst with Optimized Interface Structure and Enabled Photocatalytic Performance

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Chinese Journal of Chemistry 2017年第2期35卷 183-188页

作者： Linpeng Jiang Shujie wang Liyi Shi Yin Zhao zhuyi wang Meihong Zhang Shuai Yuan Research Center of Nanoscience and Nanotechnology Shanghai University Shanghai 200444 China

TiO2/Bi2WO6 （TB） heterojunction photocatalyst was successfully synthesized and characterized by XRD, SEM, TEM, UV-Vis and photoluminescence measurement. The heterojunction interface structure of TB heterojunction photocatalyst was optimized via adjusting the ethylene glycol/water （EG/W） ratio. Based on XRD, SEM and TEM, the crystal size of Bi2WO6 reduced from 14.6 nm to 8.8 nm, and the interface structure between Bi2WO6 nanosheets and TiO2 particle significantly changed with increasing EG concentration. Furthermore, the photoeatalytic activity and the related mechanism of TB heterojunction photocatalyst were systematically discussed. Among them, TBEG/w sample shows the highest normalized apparent rate constant, which is attributed to its highest electron-hole pairs separation ability driven by optimized heterojunction interface between two semiconductors.

关键词： TiO2/Bi2WO6 heterojunction interface structure carriers separation photocatalytic

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Fabrication and Application of Organic/Inorganic Hybrid Thin Films on the Pore Wall of Microporous Polyethylene Separator

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功能材料信息 2016年第2期13卷 54-55页

作者： Shuai Yuan zhuyi wang Liyi Shi Research Center of Nanoscience and Nanotechnology Shanghai University

Polyolefin materials,such as polyethylene and polypropylene,are the most widely used sep-arators materials in lithium ion batteries due to low cost,proper pore structure,good mechanicalstrength and favorable thermal s... 详细信息

关键词：英语阅读理解纳米材料与技术

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A review on adhesion behavior of chip seal pavement and aggregate

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第3期11卷 441-466页

作者： Yuming Zhou zhuyi Peng Jinyu wang Jianguo Wei Hao Liu Di wang Jinming Li Key Laboratory of Road Structure and Material of Ministry of Transport (Changsha) Changsha University of Science and Technology School of Traffic and Transportation Engineering Changsha University of Science and Technology Wuhan Huike Testing Co. Ltd. Department of Civil Engineering University of Ottawa CCCC Infrastructure Maintenance Group Co. Ltd.

Chip seal is widely used for preventive maintenance to mitigate pavement deterioration,but it is prone to aggregate loss during pavement service. To further promote the development and application of chip seals in road engineering in China, the research progress of the adhesion behavior of aggregate and binder in chip seals was reviewed in this paper,focusing on the adhesion mechanism of emulsified asphalt and alkaline aggregate. The Influencing factors and evaluation methodology of chip seals' aggregate adhesion behavior were also discussed. The results demonstrate that the adhesion process between emulsified asphalt and alkaline aggregate is divided into three processes including infiltration,demulsification, and cluster, which is more complicated when compared to hot asphalt.When designing a chip seal, not only the characteristics of single material should be paid attention to, but also the combination of binder and aggregate matters a lot. To form good adhesion between aggregate and asphalt binder, various influencing factors such as material selection, design method, and construction technical index should be considered comprehensively in the whole design, construction, and operation process. Three methods for evaluating adhesion behavior are summarized, including macroscopic adhesion performance tests, image analysis technology, and model prediction. It is not objective to evaluate the aggregate adhesion behavior of chip seal only by a single evaluation method.A comprehensive evaluation based on the micro-macro multi-scale method should be considered in the future.

关键词： Chip seal Adhesion behavior Asphalt binder Aggregate

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基于遥感影像的城市建筑空间分布格局对热环境的影响研究——以济南市中心城区为例

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激光与光电子学进展 2023年第2期60卷 370-376页

作者：王竹依樊彦国单宝艳中国石油大学(华东)海洋与空间信息学院山东青岛266580 山东建筑大学测绘地理信息学院山东济南250101

针对城市热环境研究中研究尺度选择不足、研究维度不全面导致研究结论与实际情况有差异的问题,提出一种定量分析和研究城市建筑空间分布格局与城市热环境相关性的方法。首先基于Landsat8遥感影像提取研究区的地表温度(LST),构建研究区... 详细信息

针对城市热环境研究中研究尺度选择不足、研究维度不全面导致研究结论与实际情况有差异的问题,提出一种定量分析和研究城市建筑空间分布格局与城市热环境相关性的方法。首先基于Landsat8遥感影像提取研究区的地表温度(LST),构建研究区城市建筑空间分布格局定量表达体系,然后利用相关分析(CA)和双变量局部空间自相关分析(BLSAA)方法探究1 km和2 km尺度下城市建筑空间分布格局对热环境的影响。所提方法对济南市中心城区热环境的研究结果表明:一、二、三维城市空间结构指标对研究尺度变化非常敏感,且一、三维城市空间结构指标尤其敏感;1 km尺度下的研究结果置信度比2 km尺度高;一、二、三维城市空间结构指标对城市热环境的影响主要为正相关,且正相关指标的个数随维度增长而递增;相比于一维城市空间结构指标,二、三维城市空间结构指标与城市热环境的相关程度较大。

关键词：遥感影像城市建筑空间分布格局相关分析双变量局部空间自相关分析热环境济南市

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基于家庭基站技术的智能家居系统设计

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电视技术 2013年第21期37卷 60-62,79页

作者：王振朝王艺衡王竹毅河北大学无线通信实验室河北保定071000

提出一种将家庭基站技术应用于智能家居系统的设计方案。本方案将智能家居网络的汇聚节点和网关集成于家庭基站之上,利用家庭基站能够便捷地连接互联网、移动网的功能特性,满足了现代智能家居系统与外部网络高速率、高实时性的数据通信... 详细信息

提出一种将家庭基站技术应用于智能家居系统的设计方案。本方案将智能家居网络的汇聚节点和网关集成于家庭基站之上,利用家庭基站能够便捷地连接互联网、移动网的功能特性,满足了现代智能家居系统与外部网络高速率、高实时性的数据通信要求。基于家庭基站的智能家居系统不但节省了网络建设的成本,又使得内部网络与外部网络信息交流更加畅通,通讯方式更加多样。

关键词：家庭基站智能家居 PC205 Linux

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多径回波信道条件下回波抵消技术研究

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电信科学 2012年第5期28卷 60-64页

作者：王振朝梁军君王竹毅李会雅河北大学电子信息工程学院保定071002

主要研究移动通信数字同频直放站的回拨抵消技术。通过对基于最小均方误差原理的自适应滤波器的收敛条件进行分析,发现即使在外信道为单径信道或只考虑多径信道的主径回波信道时,现有利用时延去相关的自适应滤波算法,在原理上存在着不... 详细信息

主要研究移动通信数字同频直放站的回拨抵消技术。通过对基于最小均方误差原理的自适应滤波器的收敛条件进行分析,发现即使在外信道为单径信道或只考虑多径信道的主径回波信道时,现有利用时延去相关的自适应滤波算法,在原理上存在着不能保证满足收敛条件的问题。针对这一问题,本文提出了将发送信号进行延时后再送入自适应估计器的改进措施,有条件地改善了回波抵消效果,并进一步提出了消除多径回波的新型技术原理。

关键词：数字同频直放站回波抵消自适应滤波算法多径信道

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