Electrochemical‐Conditioning‐Free and Water‐Resistant Hybrid AlCl3/MgCl2/Mg(TFSI)2 Electrolytes for Rechargeable Magnesium Batteries

Rechargeable magnesium batteries are a promising alternative to Li‐based energy storage because of their abundant and inexpensive components. The high sensitivity and reactivity of the organic Mg²⁺ electrolyte makes their development challenging. Herein, we develop a new hybrid electrolyte, based on three simple inorganic salts of MgCl₂, AlCl₃, and Mg(TFSI)₂. The electrolyte exhibits unprecedented electrochemical performance for reversible deposition and stripping of Mg, with Coulombic efficiency up to 97 %, overpotential down to 0.10 V, good stability especially for aluminum and stainless‐steel current collectors. It maintained its activity even after introducing 2000 ppm water and it could be prepared from impure chemicals. A full cell with the hybrid electrolyte and Mg foil as anode, Mo₆S₈ as cathode gave a specific capacity of 98 mAh g^?1 and maintained 94 % capacity after 100 cycles at a rate of 0.20 C, indicating the good compatibility of the hybrid electrolyte.     

利用全场灰度处理云纹数字图象的新方法

本文介绍并提出了一系列利用全场灰度进行云纹数字图象处理的新方法.由于充分利用了全场每个象素点的灰度信息,所以用这些方法可以得到传统方法难以得到的多种结果,例如条纹倍增、各种应变场图象的建立、应变等值线的提取等等。这些方法大大扩大了云纹法测量的使用范围。     

多个等倾干涉条纹同时形成的理论与实验研究

通常情况下在迈克耳逊干涉仪上只能观察到一个等倾干涉条纹，但是实验中只要调节得当，可以同时观察到4个等倾干涉条纹，而且变化规律相同．本文根据迈克耳逊干涉仪构造原理、等倾干涉条件和菲涅尔公式，对迈克耳逊干涉仪同时形成多个等倾干涉条纹的实验现象进行理论和实验研究．     

远距离环状干涉条纹形成的初步实验

 针对远距离激光干涉成像中条纹的形成进行了研究。分析了成像所需条纹的特点，表明干涉条纹成像系统的带宽决定于条纹的空间带宽。讨论了传统的迈克尔逊干涉仪结构在激光干涉成像中应用的不足之处，并在迈克尔逊干涉仪的基础上，提出一种变形的光路结构，用于在远距离上形成圆对称环状干涉条纹，同时报道了利用该变形结构在约50m的距离上观察到的条纹，表明了该光路结构的可行性。