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Enabling superior electrochem.cal perform.nce of NCA cathode in Li_(5.5)PS_(4.5)Cl_(1.5)-based solid-state batteries with a dual-electrolyte layer

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Chinese Chem.cal Letters 2024年第4期35卷 231-236页

作者： Ziling Jiang Shaoqing Chen Chaochao Wei Ziqi Zhang zhongkai Wu Qiyue Luo Liang m.ng Long Zhang Chuang Yu School of Chem.stry and Chem.cal Engineering Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electrom.gnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China Innovation Center for Chem.cal Sciences College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China College of Physics and Energy Fujian Normal UniversityFuzhou 350117 China

LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)(NCA) is a prom.sing cathode for sulfide-based solid-state lithium.batteries(ASSLBs)profiting from.its high specific capacity and voltage plateau, which yielding high energy density. However, the inferior interfacial stability between the bare NCA and sulfides lim.ts its electrochem.cal perform.nce. Hereien, the dual-electrolyte layer is proposed to m.tigate this effect and enhance the battery perform.nces of NCA-based ASSLIBs. The Li_(3)InCl_6 wih high conductivity and excellent electrochem.ial stability act both as an ion additives to prom.te Li-ion diffusion across the interface in the cathode and as a buffer layer between the cathode layer and the solid electrolyte layer to avoid side reactions and im.rove the interface stability. The corresponding battery exhibits high discharge capacities and superior cyclabilities at both room.and elevated tem.eratures. It exhibits discharge perform.nce of 237.04 and216.07 m.Ah/g at 0.1 and 0.5 C, respectively, when cycled at 60 ℃, and sustains 95.9% of the capacity after100 cycles at 0.5 C. The work dem.nstrates a sim.le strategy to ensure the superior perform.nces of NCA in sulfide-based ASSLBs.

关键词： LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2) Li_(5.5)PS_(4.5)Cl_(1.5) Double solid electrolyte layer configuration Operating tem.eratures Electrochem.cal perform.nces

Revealing the size effect of Fe S2on solid-state battery perform.nces at different operating tem.eratures

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Chinese Chem.cal Letters 2024年第6期35卷 189-194页

作者： Chaochao Wei Ru Wang zhongkai Wu Qiyue Luo Ziling Jiang Liang m.ng Jie Yang Liping Wang Chuang Yu School of Chem.stry and Chem.cal Engineering Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electrom.gnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of m.terials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China

FeS_(2) shows significant potential as cathode m.terial for all-solid-state lithium.batteries(ASSLBs)due to its high theoretical specific capacity,low cost,and environm.ntal ***,the poor ion/electron conductivity and large volum. variation effect of FeS_(2) inhibit its practical ***,the influence of particle size of FeS_(2) on the corresponding sulfide-based solid-state batteries is carefully investigated by tuning FeS_(2) ***,low operating tem.erature is chosen to m.tigate the large volum. changes during cycling in the battery.S-FeS_(2) with sm.ller particle sizes delivers superior electrochem.cal perform.nces than that of the larger L-FeS_(2) in Li_(5.5)PS_(4.5)Cl_(1.5)-based ASSLBs under different operating tem.eratures.S-FeS_(2) shows stable discharge capacities during 50 cycles with a current density of 0.1 m.A/cm.(2)under -20℃.When the current density rises to 1.0 m.A/cm.(2),it delivers an initial discharge capacity of 146.9 m.Ah/g and m.intains 63% of the capacity after 100 *** work contributes to constructing ASSLBs enables excellent electrochem.cal perform.nces under extrem. operating tem.eratures.

关键词： FeS_(2) Size effect Li_(5.5)PS_(4.5)Cl_(1.5) electrolytes Operating tem.eratures Electrochem.cal perform.nces

A wideband,high-resolution vector spectrum.analyzer for integrated photonics

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Light(Science & Applications) 2024年第4期13卷 760-771页

作者： Yi-Han Luo Baoqi Shi Wei Sun Ruiyang Chen Sanli Huang zhongkai Wang Jinbao Long Chen Shen Zhichao Ye Hairun Guo Junqiu Liu International Quantum.Academ. 518048 ShenzhenChina. Shenzhen Institute for Quantum.Science and Engineering Southern University of Science and Technology518055 ShenzhenChina. Departm.nt of Optics and Optical Engineering University of Science and Technology of China230026 HefeiChina. Hefei National Laboratory University of Science and Technology of China230088 HefeiChina. Qaleido Photonics 518048 ShenzhenChina. Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai University200444 ShanghaiChina

The analysis of optical spectra—em.ssion or absorption—has been arguably the m.st powerful approach for discovering and understanding *** invention and developm.nt of m.ny kinds of spectrom.ters have equipped us with versatile yet ultra-sensitive diagnostic tools for trace gas detection,isotope analysis,and resolving hyperfine structures of atom. and *** proliferating data and inform.tion,urgent and dem.nding requirem.nts have been placed today on spectrum.analysis with ever-increasing spectral bandwidth and frequency *** requirem.nts are especially stringent for broadband laser sources that carry m.ssive inform.tion and for dispersive devices used in inform.tion processing *** addition,spectrum.analyzers are expected to probe the device’s phase response where extra inform.tion is *** we dem.nstrate a novel vector spectrum.analyzer(VSA)that is capable of characterizing passive devices and active laser sources in one *** a dual-m.de VSA can m.asure loss,phase response,and dispersion properties of passive *** also can coherently m.p a broadband laser spectrum.into the RF *** VSA features a bandwidth of 55.1 THz(1260–1640 nm.,a frequency resolution of 471 kHz,and a dynam.c range of 56 ***,our fiber-based VSA is com.act and *** requires neither high-speed m.dulators and photodetectors nor any active feedback ***,we em.loy our VSA for applications including characterization of integrated dispersive waveguides,m.pping frequency com. spectra,and coherent light detection and ranging(LiDAR).Our VSA presents an innovative approach for device analysis and laser spectroscopy,and can play a critical role in future photonic system. and applications for sensing,com.unication,im.ging,and quantum.inform.tion processing.

关键词： spectrum resolution coherent

基于有效控制抽水量和地面沉降的长江Ⅰ级阶地深基坑深井降水参数取值优化

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安全与环境工程 2024年第2期31卷 100-109页

作者：王忠凯徐光黎武汉博归置业有限公司湖北武汉430050 中国地质大学(武汉)工程学院湖北武汉430074

针对目前深基坑深井降水研究中仅关注目标降深及相应地面沉降,未考虑满足目标降深条件下的有效控制抽水量问题,以武汉长江隧道明挖段深基坑深井降水工程为例,通过抽水试验分析了井管直径、进水段的相对位置b/m.及井的不完整程度l/m.... 详细信息

针对目前深基坑深井降水研究中仅关注目标降深及相应地面沉降,未考虑满足目标降深条件下的有效控制抽水量问题,以武汉长江隧道明挖段深基坑深井降水工程为例,通过抽水试验分析了井管直径、进水段的相对位置b/m.及井的不完整程度l/m.基坑涌水量的影响,确定了止水帷幕长度、井管直径、过滤管有效长度和合理位置等降水参数,根据试验数据拟合出该地区非完整井涌水量经验公式;建立了控制抽水量和地面沉降的深基坑深井降水参数优化设计模型,求解m.xf(l)得出的过滤管长度,与抽水试验结果相近。结果表明:止水帷幕进入强透水层厚度2/3处时,其对基坑坑内抽水量和坑内外水位有控制作用;选用Φ250井管、过滤管设置在强透水层上部(b=0)、l/m.较小及附加阻力系数差(ξ_(1)-ξ_(2))最大时,基坑涌水量较小;q_(0)-l、Δq_(0)/Δl-l曲线中曲率最大点对应的过滤管长度范围为14.0~16.0 m.其对应的基坑涌水量q0最小;考虑井群干涉的影响,干涉井涌水量在基坑中心处最小、角点处最大。

关键词：深基坑深井降水控制抽水量地面沉降止水帷幕过滤管长度群井干涉

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超临界二氧化碳萃取元宝枫籽油工艺优化

中国油脂 2024年第9期49卷 10-15页

作者：蒋雨桥赵仲恺张文斌江南大学食品学院江苏无锡214122 新疆大学生命科学与技术学院乌鲁木齐830046

为了得到品质优良的元宝枫籽油产品,采用超临界二氧化碳萃取元宝枫籽油,以油脂萃取率为指标,通过单因素试验和响应面试验优化工艺条件,并对所得元宝枫籽油的脂肪酸组成、理化指标、甾醇和生育酚含量进行分析。结果表明:超临界二氧化碳... 详细信息

为了得到品质优良的元宝枫籽油产品,采用超临界二氧化碳萃取元宝枫籽油,以油脂萃取率为指标,通过单因素试验和响应面试验优化工艺条件,并对所得元宝枫籽油的脂肪酸组成、理化指标、甾醇和生育酚含量进行分析。结果表明:超临界二氧化碳萃取元宝枫籽油的最优工艺条件为原料粒度380~830μm.20~40目)、二氧化碳流量28 L/h、萃取温度37℃、萃取压力44 m.a、萃取时间100 m.n,在该条件下油脂萃取率达(98.7±0.2)%;元宝枫籽油中神经酸含量高达9.34%,总不饱和脂肪酸含量为86.7%,各项理化指标均符合相关标准,总甾醇和总生育酚含量分别为988.1μg/g和991.4μg/g,综合品质优于正己烷萃取和低温压榨制取的油脂。综上,超临界二氧化碳萃取元宝枫籽油的萃取率高,产品品质优良,是一种绿色、高效的提油技术。

关键词：元宝枫籽油超临界二氧化碳萃取脂肪酸组成油脂品质

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Position Control Optim.zation of Aerodynam.c Brake Device for High-speed Trains

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Chinese Journal of m.chanical Engineering 2014年第2期27卷 287-295页

作者： ZUO Jianyong LUO Zhuojun CHEN zhongkai Institute of Railway and Urban m.ss Transit Tongji University

The aerodynam.c braking is a clean and non-adhesion braking, and can be used to provide extra braking force during high-speed em.rgency braking. The research of aerodynam.c braking has attracted m.re and m.re attentions in recent years. However, m.st researchers in this field focus on aerodynam.c effects and seldom.on issues of position control of the aerodynam.c braking board. The purpose of this paper is to explore position control optim.zation of the braking board in an aerodynam.c braking prototype. The m.them.tical m.dels of the hydraulic drive unit in the aerodynam.c braking system.are analyzed in detail, and the sim.lation m.dels are established. Three control functions--constant, linear, and quadratic--are explored. Two kinds of criteria, including the position steady-state error and the acceleration of the piston rod, are used to evaluate system.perform.nce. Sim.lation results show that the position steady state-error is reduced from.around 12-2 m. by applying a linear instead of a constant function, while the acceleration is reduced from.25,71-3.70 m.s2 with a quadratic control function. Use of the quadratic control function is shown to im.rove system.perform.nce. Experim.ntal results obtained by m.asuring the position response of the piston rod on a test-bench also suggest a reduced position error and sm.oth m.vem.nt of the piston rod. This im.lies that the acceleration is sm.ller when using the quadratic function, thus verifying the effectiveness of control schem.s to im.rove to system.perform.nce. This paper proposes an effective and easily im.lem.nted control schem. that im.roves the position response of hydraulic cylinders during position control.

关键词： high-speed train aerodynam.c brake hydraulic position control optim.zation.

基于WSN和TJ_UWIS的地下结构变形动态监测平台与教学应用

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实验技术与管理 2024年第6期41卷 206-212页

作者：张冬梅韩星黄忠凯冯永珍马旭同济大学岩土及地下工程教育部重点实验室上海200092 同济大学地下建筑与工程系上海200092 青海大学土木水利学院青海西宁810016 青海省大通公路段青海西宁810016

为实现复杂条件下地下结构变形的动态监测,提高学生对无线监测系统的认知,设计了基于WSN(wireless sensor network)和TJ_UWIS倾角传感支点的无线监测实验平台,并应用于实际教学中。该实验平台测量精度高,可以通过TJ_UWIS倾角传感支点测... 详细信息

为实现复杂条件下地下结构变形的动态监测,提高学生对无线监测系统的认知,设计了基于WSN(wireless sensor network)和TJ_UWIS倾角传感支点的无线监测实验平台,并应用于实际教学中。该实验平台测量精度高,可以通过TJ_UWIS倾角传感支点测得地下结构的X/Y/Z三向的倾角变形值,从而反映结构的实际变形状况;最大监测频率可设置为1 m.n/次,可实现结构变形的精准动态监测。该实验平台的应用,有助于提高学生对无线传感监测系统原理与系统组成的认识,掌握具体应用方法,锻炼学生的专业素养和创新思维。

关键词：无线监测倾角传感器地下结构变形实验测量平台

基于混沌序列的m.m.-OFDm.达通信一体化波形设计

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应用科技 2024年第3期51卷 121-127页

作者：赵忠凯闫秋贞哈尔滨工程大学信息与通信工程学院黑龙江哈尔滨150001

为了解决多输入多输出的正交频分复用(m.ltiple input m.ltiple output orthogonal frequency division m.ltiplexing,m.m.-OFDm.雷达通信一体化信号波形由于通信信息的不确定性导致模糊函数旁瓣水平较高以及系统雷达探测能力较差的问题... 详细信息

为了解决多输入多输出的正交频分复用(m.ltiple input m.ltiple output orthogonal frequency division m.ltiplexing,m.m.-OFDm.雷达通信一体化信号波形由于通信信息的不确定性导致模糊函数旁瓣水平较高以及系统雷达探测能力较差的问题,提出利用混沌序列对通信信息进行直接扩频。但普通单级混沌序列具有保密性低,可用数量少,容易被破解的缺点。因此采用一种基于加权算法优化的混合型级联混沌序列对通信信息进行扩频调制,然后再通过m.m.-OFDm.体化系统进行传输。由仿真结果可知,加权后的级联混沌序列相关性和误码率性能较m.列和Gold序列更好,经此序列扩频后的一体化信号模糊函数旁瓣水平会更低,故该一体化波形雷达探测性能更佳。且混沌序列越长,信号波形雷达探测能力越好。

关键词：达通信一体化级联混沌序列模糊函数非周期相关性扩频 m.m.-OFDm 加权算法

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软土地区典型民防工程结构地震易损性分析

隧道建设（中英文） 2024年第7期44卷 1397-1409页

作者：程屹歆张冬梅黄忠凯张吾渝王寿生同济大学地下建筑与工程系上海200092 青海大学土木水利学院青海西宁810016 上海市政工程设计研究总院(集团)有限公司上海200092

为揭示软土地区典型民防工程结构地震易损性变化规律,以某单建式民防工程为例,首先,基于ABAQUS有限元平台建立土体-民防工程结构系统非线性动力分析模型;其次,进一步考虑土体非线性特性和输入地震动的不确定性,通过数值模拟揭示民防工... 详细信息

为揭示软土地区典型民防工程结构地震易损性变化规律,以某单建式民防工程为例,首先,基于ABAQUS有限元平台建立土体-民防工程结构系统非线性动力分析模型;其次,进一步考虑土体非线性特性和输入地震动的不确定性,通过数值模拟揭示民防工程结构易损性分析的合适地震动强度指标(Im.;最终,建立软土地区典型民防工程结构地震易损性曲线。研究结果表明:1)峰值地面加速度(PGA)相较于其他地震动强度指标,其有效性和实用性较高,适合用于民防工程结构地震易损性分析;2)土层条件对民防工程结构的地震易损性有明显影响,土层越软,结构的易损性越高;3)软土地区民防工程结构在地震作用下有可能遭受严重破坏,随着地震动强度的增加,每种破坏状态的超越概率逐渐增加并接近100%。

关键词：民防工程软土地区地震易损性分析地震动强度指标