检索结果-南通市图书馆

Stress-Induced uphill diffusion with Interfacial Contact Loss in Solid-State Electrodes

Acta Mechanica Solida Sinica 2022年第1期35卷 113-128页

作者： Yanfei Zhao Dingxin Shi Bo Lu Junqian Zhang lDepartment of Civil Engineering School of Mechanics and Engineering ScienceShanghai UniversityShanghai 200444China Department of Mechanics Shanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200444China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai UniversityShanghai 200444China

We simulate the mechanical-chemical coupling during delithiation and relaxation of a cathode in a solid-state lithium-ion *** loss at the interface between the active particle and the solid electrolyte is *** diffusion is observed during delithiation and *** phenomenon is explained by analyzing the total chemical potential and its two *** loss at the interface greatly influences the stress and stress gradient in the active *** delithiation continues,the stress and stress gradient grow considerably,and the mechanical part of the total chemical potential becomes dominant over the chemical part of *** the latter stage of delithiation,the influence of the incomplete interfacial constraint on the stress becomes dominant,while the effect of the concentration gradient becomes *** relaxation,the concentration and stress gradients increase in a particle with contact *** influence of the degree of contact loss on the mechanical-chemical coupling is *** overall tensile stress in the active particle increases with decreasing contact loss,causing a sharp decrease in local *** also check the effect of the elastic modulus of the solid electrolyte on the coupling of the active material.A rigid solid electrolyte with a higher elastic modulus more strongly restricts the active particle,leading to a higher tensile stress,a larger stress gradient,and a greater concentration gradient.

关键词： Solid electrolyte Contact loss uphill diffusion Mechanical-chemical coupling Chemical potential Relaxation

来源：

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

Phase evolution of binary immiscible Al-Sn film

引用

Rare Metals 2022年第12期41卷 4241-4247页

作者： Xiao-Meng Pan Hui-Ping Duan School of Materials Science and Engineering Beihang UniversityBeijing 100191China

Binary immiscible Al-Sn alloy is a very important potential anode material for lithium ion *** phase stability and separation process of Al-Sn film,fabricated by magnetron co-sputtering method,was investigated by X-ray diffractometer(XRD),differential scanning calorimetry(DSC) and in situ transmission electron microscopy(TEM) and explained by Miedema theoretical *** analysis reveals that the asdeposited Al-Sn film will decompose spontaneously into Al-riched areas and Sn-riched areas because of the positive mixing *** crystallization process takes place when the Al content in the Al-riched area or Sn content in the Sn-riched area *** results show that Al-Sn thin film is composed of an amorphous matrix and well-dispersed composite *** particle contains an Al-riched area and a Sn-riched *** Snriched area crystallizes and swallows up the Al-riched area gradually during heating through uphill diffusion of the Sn *** on the theoretical analysis and experimental results,an empirical model to explain the phase evolution process in the Al-Sn film was proposed.

关键词： Immiscible alloy uphill diffusion Phase evolution Miedema theory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synergistic and Antisynergistic Intracrystalline diffusional Influences on Mixture Separations in Fixed-Bed Adsorbers

引用

Precision Chemistry 2023年第2期1卷 83-93页

作者： Rajamani Krishna Van’t Hoff Institute for Molecular Sciences University of Amsterdam Science Park9041098

Separations of mixtures in fixed-bed adsorbers are influenced by factors such as(1)selectivity of adsorption,Sads,(2)diffusional time constants,Đi/rc 2,and(3)diffusion selectivity,Đ1/Đ*** synergistic separations,intracrystalline diffusion of guest molecules serves to enhance the selectivities dictated by thermodynamics of mixture *** antisynergistic separations,intracrystalline diffusion serves to reverse the hierarchy of selectivities dictated by adsorption *** both scenarios,the productivities of the desired product in fixed-bed operations are crucially dependent on diffusional time constants,Đi/rc 2;these need to be sufficiently low in order for diffusional influences to be ***,the ratioĐ1/Đ2 should be large enough for manifestation of synergistic or antisynergistic *** synergistic and antisynergistic separations have two common,distinguishing ***,for transient uptake within crystals,the more mobile component attains supraequilibrium loadings during the initial stages of the *** overshoots,signifying uphill diffusion,are engendered by the cross-coefficientsΓij(i≠j)of thermodynamic correction ***,the component molar loadings,plotted in composition space,follow serpentine equilibration *** cross-coefficients are neglected,no overshoots in the loadings of the more mobile component are experienced,and the component loadings follow monotonous equilibration *** important takeaway message is that the modeling of mixture separations in fixed-bed adsorbers requires the use of the Maxwell−Stefan equations describing mixture diffusion employing chemical potential gradients as driving forces.

关键词： kinetic separations transient uptake microporous crystalline adsorbents Maxwell−Stefan equations thermodynamic coupling uphill diffusion transient breakthrough fixed-bed adsorber

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：