检索结果-南通市图书馆

Electro-chemo-mechanical analysis of the effect of bending deformation on the interface of flexible solid-state battery

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2023年第2期44卷 189-206页

作者： Yutao SHI Chengjun XU Bingbing CHEN jianqiu zhou Rui CAI School of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 210000China School of Energy Science and Engineering Nanjing Tech UniversityNanjing 210000China State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 210009China

Flexible solid-state battery has several unique characteristics including high flexibility,easy portability,and high safety,which may have broad application prospects in new technology products such as rollup displays,power implantable medical devices,and wearable *** interfacial mechanical and electrochemical problems caused by bending deformation,resulting in the battery damage and failure,are particularly ***,a fully coupled electro-chemo-mechanical model is developed based on the actual solid-state battery ***-dependent material parameters,stress-dependent diffusion,and potential shift are *** to four bending forms(k=8/mm,0/mm,-8/mm,and free),the results show that the negative curvature bending is beneficial to reducing the plastic strain during charging/discharging,while the positive curvature is ***,with respect to the electrochemical performance,the negative curvature bending creates a negative potential shift,which causes the battery to reach the cut-off voltage earlier and results in capacity *** results enlighten us that suitable electrode materials and charging strategy can be tailored to reduce plastic deformation and improve battery capacity for different forms of battery bending.

关键词： solid-state battery electro-chemo-mechanical coupling model bending deformation phase-transformation plastic deformation

Unconventional dislocation starvation behavior of medium-entropy alloy single crystal pillars containing pre-existing dislocations

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第11期142卷 60-75页

作者： Luling Wang Bin Liu jianqiu zhou Yang Cao Feng Zhang Yonghao Zhao Department of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 210009China Nano and Heterogeneous Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Mechanical Engineering Nanjing Institute of TechnologyNanjing 211167China

The excellent dislocation storage ability of bulk multi-principal element alloys(MPEAs)has been widely *** date,however,the underlying mechanisms of dislocation escape behavior in small-size facecentered cubic(FCC)MPEAs have rarely been ***,we quantitatively control the initial dislocation densities(-10^(15) m^(-2) and -10^(16) m^(-2))by large-scale molecular dynamics(MD)simulations and perform uniaxial compression simulations to compare the dislocation starvation behavior of CrCoNi with pure Cu single crystal pillars(SCPs).The analysis reveals that the CrCoNi SCPs with low initial dislocation density(-10^(15) m^(-2))can continuously accommodate mobile dislocations,and the critical dimension for dislocation starvation is about 30 *** particular,the CrCoNi SCPs with chemical short-range ordering(SRO)exhibit better dislocation storage and multiplication abilities than the random solid solution(RSS)samples even when the initial dislocation density is ***,the presence of a large number of pre-existing dislocation locks governs the strong dislocation multiplication ability of the small-size RSS CrCoNi SCPs,in obvious contrast to the deformation of all pure Cu SCPs which is completely dominated by intermittent mobile dislocation *** importantly,we reveal the fundamental physics for the good dislocation storage of CrCoNi SCPs at small sizes from the perspective of chemical *** new phenomena reported in this work provide a unique atomic-scale perspective for understanding the microscopic physical origin of the mechanical behavior of MPEAs and the discovery of extremely slow dislocation escape behavior in small-scaled pillars,providing a reliable basis for the development of the dislocation starvation model.

关键词： Molecular dynamics Medium entropy alloy Single crystal pillar Dislocation starvation Chemical short-range order Size effect

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

新型电石集热系统性能的数值研究

能源工程 2024年第3期44卷 53-63页

作者：陶平任杰姜石恒周剑秋南京工业大学能源科学与工程学院江苏南京211816 中盐吉兰泰氯碱化工有限公司内蒙古自治区阿拉善盟737300

刚出炉的电石有着巨大的显热,而将电石放置在环境中自然冷却会造成巨大的能源浪费。因此本文提出一种新型电石余热回收系统,并采用数值模拟研究了其中集热系统的换热性能。研究了入口流速和季节情况对集热系统性能的影响。结果表明瞬时... 详细信息

刚出炉的电石有着巨大的显热,而将电石放置在环境中自然冷却会造成巨大的能源浪费。因此本文提出一种新型电石余热回收系统,并采用数值模拟研究了其中集热系统的换热性能。研究了入口流速和季节情况对集热系统性能的影响。结果表明瞬时效率、㶲损失和压降随着入口流速的增大而增大,有效度随着入口流速的增大而减小。不同季节下集热系统的换热性能顺序为:夏季晴天>夏季阴天>冬季晴天>冬季阴天。

关键词：电石数值模拟集热系统换热性能

椭圆翅片管的流动传热特性及积灰磨损规律研究

在线全文

学校读者我要写书评

暂无评论

锅炉技术 2024年第2期55卷 7-14页

作者：邹建江建军李强杨小兵褚红娟邸希超周剑秋南通醋酸纤维有限公司江苏南通226008 南京工业大学能源科学与工程学院江苏南京211816

利用Fluent有限元模拟软件对分离式热管蒸发端翅片管束的流动传热以及积灰冲蚀特性进行数值仿真。分析结果显示:换热量和进出口压降随烟气进口速度的增大而增大,随管间距的增大而减小;管壁和翅片处的烟尘颗粒沉积率以及平均冲蚀率随烟... 详细信息

利用Fluent有限元模拟软件对分离式热管蒸发端翅片管束的流动传热以及积灰冲蚀特性进行数值仿真。分析结果显示:换热量和进出口压降随烟气进口速度的增大而增大,随管间距的增大而减小;管壁和翅片处的烟尘颗粒沉积率以及平均冲蚀率随烟气进口速度的增加而上升,随管间距的增加而下降。探究分离式热管换热器蒸发端烟气的流动传热特性及积灰磨损情况,为提高分离式热管换热器性能以及提升锅炉系统整体效能提供充分的理论指导。

关键词：椭圆翅片管颗粒沉积冲蚀数值模拟

Novel Zr-doped β-Li_(3)PS_(4) solid electrolyte for all-solid-state lithium batteries with a combined experimental and computational approach

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第2期16卷 3516-3523页

作者： Junbo Zhang Guoxi Zhu Han Li Jiangwei Ju Jianwei Gu Renzhuang Xu Sumin Jin jianqiu zhou Bingbing Chen Department of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 211816China Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Energy Science and Engineering Nanjing Tech UniversityNanjing 211816China

All-solid-state lithium batteries(ASSLBs)are promising for safety and high-energy-density large-scale energy *** this contribution,we propose a Li_(3–4x)Zr_(x)PS_(4)(LZPS)by Zr-dopedβ-Li_(3)PS_(4)(LPS)as a novel solid electrolyte(SE)for ASSLBs based on experimental and simulation *** structure,electronic property,mechanical property,and ionic transport properties of LZPS(x=0,0.03,0.06,and 0.1)are investigated with first-principles ***,LZPS is prepared by solid states reaction *** combining experimental analysis and first-principles calculations,it is confirmed that a small amount of Zr4+can be successfully doped into the framework ofβ-LPS composites without significantly compromising structural *** the Zr^(4+)concentration is x=0.03,the doped material Li_(2.88)Zr_(0.03)PS_(4)exhibits the highest ionic conductivity(5.1×10^(−4)S·cm^(−1))at 30℃,and the Li-ion migration energy barrier is the *** Li_(2.88)Zr_(0.03)PS_(4)SE has obtained the best mechanical properties,the good ductility,and shear deformation resistance,which can better maintain the structural stability of the *** addition,the Li/Li symmetrical cell is assembled,which shows excellent electrochemical stability of electrolyte against *** constructed all-solid-state batteries(LiCoO_(2)-Li_(6)PS_(5)Cl|Li_(2.88)Zr_(0.03)PS_(4)|Li-In)delivers an initial discharge capacity of 130.4 mAh·g^(−1)at 0.2 C and a capacity retention of 85.1%after 100 cycles at room *** study provides a promising electrolyte for the application of ASSLBs with high ionic conductivity and excellent stability against lithium.

关键词： all-solid-state lithium batteries first-principles calculations high ionic conductivity interface stability

Effect of Er_(30)Cu_(70) on microstructure and properties of sintered Nd-Fe-B by grain boundary reconstruction

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第2期42卷 345-353,I0004页

作者： Kai Wang Yongtao Dai jianqiu Deng Jiang Wang Huaiying zhou Qingrong Yao Weichao Huang Guangxi Key Laboratory of Information Materials Schoolof Materials Science and EngineeringGuilin University of Electronic TechnologyGuilin54004China China Rare Metals and Rare Earth(Guangxi)Jinyuan New Materials Co Ltd.Hezhou542603China

Usually it is generally believed that the Er element forms the Er_(2)Fe_(14)B phase,which will seriously deteriorate the magnetic ***,here we report the balance of corrosion resistance and coercivity in Nd-Fe-B sintered magnets through using simple Er_(30)Cu_(70) additive whose price is much lower than Dy and *** reasonably controlling Er_(30)Cu_(70) addition,the corrosion resistance is improved at the minimum limit of reducing the magnetic *** studying the influence mechanism of Er element,it is found that the main effect of Er elements is to replace the Nd elements at the edge of the main phase grains to form a(Er,Nd)_(2)Fe_(14)B shell with low H_(A),resulting in the reduction of magnetic *** improvement of corrosion resistance mainly comes from the more stable Cu element introduced at the grain *** the same time,the target magnets also show different advantages under different heat treatment *** findings may spur progress towards developing the lowcost permanent magnets that rival the commercial Nd-Fe-B counterpart.

关键词： Er_(30)Cu_(70)alloy Grain boundary reconstruction Magnetic properties Corrosion resistance Heat treatment Rare earths

Organic Geochemistry Characteristics in Ores and Host Rocks from Qixiashan Lead-Zinc Deposit, Nanjing, China

在线全文

学校读者我要写书评

暂无评论

Journal of China University of Geosciences 2003年第2期14卷 127-136页

作者： Xie Shucheng Wang Hongmei Guo jianqiu Liang Bin zhou Xiugao Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074 Faculty of Earth Sciences China University of Geosciences Wuhan 430074

Organic matter, associated with ores, host rocks, ore source rocks and present in fluid inclusions in the Qixiashan lead zinc polymetallic deposit hosted in Upper Carboniferous dolomites and limestones in East China, was systematically analyzed using Fourier transform infrared spectroscopy, gas chromatography (GC), GC/mass spectrometry and proton induced X ray emission. The biomarker ratios of n C - 21 / n C + 22 alkanes, C 23 tricyclic/C 30 hopane and the tricyclic terpane parameters including C 21 /C 23 , C 19-20 /C 21-29 and C 19-25 /C 26-29 can effectively discriminate ores from host rocks. Extractable organic matter present in fluid inclusions displays similarities to those enclosed in the ore source rocks in the biomarker ratios, suggesting that a proportion of organic matter was introduced into the deposit from the ore source strata. The presence of copper and zinc in stage Ⅱ pyrobitumen indicates that some metals may have been transported by an organic fluid or removed from an aqueous fluid by organic matter.

关键词： biometallogenesis biomineralization mineral deposit molecular fossil.

在线全文

学校读者我要写书评

暂无评论

实施校本培训提升教师素质

全球教育展望 2006年第7期35卷 75-77页

作者：周健秋嘉定区迎园小学校长上海201800

校本培训,为教师的学习交流研讨提供了思维互动的平台。迎园小学立足实际,基于学校。以先进的教育理念为指导,以教育发展和教师需求为培训内容,实施多层面多形式的校本培训,形成了学习型团队,让教师成为了最具有开发价值、可持续发展的... 详细信息

校本培训,为教师的学习交流研讨提供了思维互动的平台。迎园小学立足实际,基于学校。以先进的教育理念为指导,以教育发展和教师需求为培训内容,实施多层面多形式的校本培训,形成了学习型团队,让教师成为了最具有开发价值、可持续发展的课程资源,特别是在新理念下教学行为的转变和体验,推动了教师间交流的互相启发,在互动中获得新的感受,分享成功的经验,帮助教师顺利地步入实践,达到了学校与教师的共同发展。

关键词：理念指导团队形式机制保障教师素质校本培训培训内容课程资源迎园小学

在线全文

学校读者我要写书评

暂无评论

金属陶瓷太阳能选择性吸收涂层传热研究

材料导报 2016年第1期30卷 19-26页

作者：庞旭明杨晶歆周剑秋南京工业大学机械与动力工程学院南京211816 南京工业大学能源学院南京211816

在太阳能热利用中,太阳能集热器的传热性能至关重要。主要综述了太阳能光谱选择性吸收涂层有效导热系数的理论预测方法、材料制备方法以及实验测量导热系数的方法。对比了多种方法,简要分析了各种方法的优缺点,强调了界面接触热阻在复... 详细信息

在太阳能热利用中,太阳能集热器的传热性能至关重要。主要综述了太阳能光谱选择性吸收涂层有效导热系数的理论预测方法、材料制备方法以及实验测量导热系数的方法。对比了多种方法,简要分析了各种方法的优缺点,强调了界面接触热阻在复合材料导热中的重要性。最后将理论、制备、实验三者结合,对未来的发展趋势做出了展望。

关键词：金属陶瓷太阳能选择性吸收涂层有效导热系数界面热阻