A panoramic view of Li7P3S11 solid electrolytes synthesis,structural aspects and practical challenges for all-solid-state lithium batteries

The development of an inorganic electrochemical stable solid-state electrolyte is essentially responsible for future state-of-the-art all-solid-state lithium batteries (ASSLBs). Because of their advantages in safety, working temperature, high energy density, and packaging, ASSLBs can develop an ideal energy storage system for modern electric vehicles (EVs). A solid electrolyte (SE) model must have an economical synthesis approach, exhibit electrochemical and chemical stability, high ionic conductivity, and low interfacial resistance. Owing to its highest conductivity of 17 mS·cm^-1, and deformability, the sulfide-based Li₇P₃S₁₁ solid electrolyte is a promising contender for the high-performance bulk type of ASSLBs. Herein, we present a current glimpse of the progress of synthetic procedures, structural aspects, and ionic conductivity improvement strategies. Structural elucidation and mechanistic approaches have been extensively discussed by using various characterization techniques. The chemical stability of Li₇P₃S₁₁ could be enhanced via oxide doping, and hard and soft acid/base (HSAB) concepts are also discussed. The issues to be undertaken for designing the ideal solid electrolytes, interfacial challenges, and high energy density have been discoursed. This review aims to provide a bird's eye view of the recent development of Li₇P₃S₁₁-based solid-state electrolyte applications and explore the strategies for designing new solid electrolytes with a target-oriented approach to enhance the efficiency of high energy density all-solid-state lithium batteries.     

基于有限元方法的CeCl3和NdCl3在LiCl-KCl熔盐中的电极动力学模拟

充分理解锕系元素和镧系元素在熔盐中的行为和性质是实现反应堆乏燃料熔盐电解后处理的关键,然而熔盐电解实验所需的高温环境、腐蚀性熔盐甚至放射性物质等条件限制了实验的广泛开展。为寻求一种低成本且可靠的获取元素在熔盐中性质的途径,采用有限元方法在不同温度下模拟了不同浓度的三氯化铈和三氯化钕在LiCl-KCl熔盐中的循环伏安曲线,并与实验数据做了对比。结果表明,有限元方法能够较为准确地反映实际电化学过程,继而为乏燃料熔盐电解后处理提供数据支持。     

用丝束电极研究混凝土中钢筋腐蚀的不均匀性

用8×8阵列丝束电极模拟研究了混凝土中钢筋的腐蚀.将混凝土试样浸泡在10 %NaCl溶液中,通过测量铁丝束电极的自腐蚀电位和极化电阻,获得了在相同埋置深度和不同埋置深度时,铁丝腐蚀的电位、极化电阻和腐蚀速度分布等信息,研究了混凝土结构和氯离子浓度对它们的影响.结果表明,混凝土中铁丝腐蚀不均匀.自腐蚀电位和极化电阻较分散,电位随时间负移、极化电阻变小,丝束之间的电位差增大.随铁丝埋入深度增加,电位负移量、氯离子浓度和腐蚀速度都减小、极化电阻增加     

PASSAT GP雾灯壳体注射模设计

针对于PASSATGP雾灯壳体模具结构设计进行了探讨。采用了先进的热流道技术，可以缩短加工周期，提高加工质量，节约材料，降低成本。     

管模工艺的优化

管模是生产离心球墨铸铁管的模具,其毛坯的锻造成型非常困难。本文介绍了管模锻造工艺的优化过程。采用优化后的工艺,解决了管模在锻造生产中出现的各种问题,使管模的成品率大幅提高。同时也为长筒型锻件的成型提供了可靠的参考依据。     

人血清白蛋白对模拟宫腔液中铜的光电响应特性的影响

用动电位伏安法，动电位光电流测量，表面膜的阴极还原和XRD分析等手段研究了铜在含或不含人血清白蛋白的模拟宫腔液（pH=7)中的电化学和光电化学行为，在不含白蛋白的模拟宫腔液中，铜电极表面生成的Cu2O呈n型光响应；一定量白蛋白存在时使Cu2O的光响应从n型转为p型，Cu2O在模拟宫腔液中呈n型光响应可归因于氯离子对Cu2O的掺杂，白蛋白排斥氯离子对Cu2O的掺杂，使其光响应从n型转为p型。     

微小电极夹持送进机构设计

设计实现了一种微小电极丝送进机构，使电极丝在随主轴旋转并在轴向高精度的伺服进给控制下，可实现电极丝长距离的送进及损耗自动补偿。其中电极丝的夹紧切换由一个常闭夹丝机构和一个常开夹丝机结构执行，常闭和常开夹丝机构可由电磁或形状记忆合金致动控制。     

旋转电极电渣重熔过程电极熔速的理论解析

摘要：旋转电极电渣重熔通过改变结晶器内熔体的流动和传热规律,增强了渣池与电极间的对流换热,在提高电极熔化速率和生产效率方面具有巨大潜力。提出了电渣重熔过程电极熔化速率的求解方法,并考虑了电极旋转时的强制对流,基于多物理场耦合模型预测了电极直径、转速对电极熔化速率的影响规律。结果表明,随着转速提高,金属液滴由从电极中心滴落向电极边缘滴落转变,高温区由渣池外侧向渣池中心移动。当转速从0增大至90r/min,55mm直径电极的熔化速率从7.90g/s增大至9.68g/s,对比固定电极,转速为90r/min时,生产效率最多提高了22.5%;进一步增大转速,电极熔化速率反而减小。存在一个最佳转速可使熔化速率达到最大,且该最佳转速随着电极直径的增大而减小。     

在线监测结晶器调宽换向阀阀芯卡阻方法的实现

对某炼钢厂铸机结晶器在线调宽液压系统的工作原理进行了分析,并重点分析了调宽过程中换向阀阀芯卡阻的问题,针对该问题对其液压系统进行了改进,改进后可以在线监测换向阀阀芯是否卡阻。该改进的实施在减少结晶器在线调宽时发生漏钢故障方面起到了重要作用。     

Effect of deep cryogenic treatment on mechanical behavior of a Cu-Cr-Zr alloy for electrodes of spot welding

The effects of deep cryogenic treatment on mechanical behavior of a Cu-Cr-Zr alloy for electrodes of spot welding were investigated employing Brinell-hardness testing unit, abrasion examination machine, electronic almighty testing machine and X-ray stress analyzer. Tensile fracture surfaces of the alloy were characterized by scanning electronic microscope （SEM） with energy dispersive X-ray spectroscopy （EDS）. The results showed that, after deep cryogenic treatment, σb and σ0.2 increased 23 MPa and 21 MPa respectively, the wear rate of the alloy exhibited the trend of decrease with the decreasing temperature and increasing time of deep cryogenic treatment, and the surface residual stress of the alloy was partially eliminated by deep cryogenic treatment.