论文部分内容阅读
以无机锂盐(LiCl)的醇溶液为前驱体,聚丙烯酸(PAA)既作为分散剂又为凝胶引导剂,环氧丙烷为凝胶促进剂,采用溶胶-凝胶工艺制备了块状锂基醇凝胶,经CO2超临界流体干燥工艺,得到白色锂基气凝胶块体样品,其密度约为150 g/m3。用透射电镜(TEM)对气凝胶的微观结构进行分析表明,气凝胶样品由线性骨架构成网络结构。结合红外光谱分析及XPS测试结果分析可知,样品中主要含有锂、碳元素。由BET测试结果可知,样品比表面积达18.9 m2/g。
Polyacrylic acid (PAA) was used as both a dispersant and a gel guide for the precursor solution of an inorganic lithium salt (LiCl) in alcohol solution. Propylene oxide was used as a gel accelerator. Bulk lithium was prepared by a sol-gel process Alkali alcohol gel, by CO2 supercritical fluid drying process to obtain white lithium-based airgel block samples, the density of about 150 g / m3. Analysis of the microstructure of the aerogels by transmission electron microscopy (TEM) showed that the aerogels samples consisted of a linear framework that formed the network structure. Combined with infrared spectroscopy and XPS test results show that the sample contains mainly lithium and carbon. From the BET test results, the specific surface area of the sample reached 18.9 m2 / g.