邻乙氧基苯甲醛的合成

以廉价易得的邻羟基苯甲醛、伯胺及溴乙烷为原料,在温和条件下,采用两步简单反应合成了目标化合物邻乙氧基苯甲醛。通过优化实验,确定了合成的最佳工艺条件。与已见报道的方法比较,该方法的收率有大幅度提高,最大收率达到了83 %。用¹H NMR谱、¹³C NMR谱及元素分析对产物的结构进行了表征,结果与目标化合物相符。     

Simulated annealing reconstruction and characterization of a LiCoO2 Lithium-ion battery cathode

We reconstruct the three-dimensional microstructure of a cathode from a commercial LiCoO2 Lithium-ion battery with an adapted simulated annealing approach. The real size distribution curve of LiCoO2 particles is applied to regulate the reconstruction process. By discretizing a 40 μm×40 μm×40 μm cathode volume with 8000000 numerical cubes, the cathode involving three individual phases： （1） LiCoO2 as active material, （2） pores or electrolyte, and （3） additives （polyvinylidene fluoride＋carbon black） is reconstructed. Characterization of the reconstructed cathode gives important structural and transport properties including volume-specific surface area between phases, tortuosity and geometrical connectivity of individual phase.