摘要
分别利用水解法及醇解法制备不同添加比例的Ti O_2-Si O_2纳米复合材料,并对制得的复合材料进行金属掺杂,得到一种高效纳米复合材料的制备方法。通过X射线衍射(XRD)、比表面积(BET)及孔径分布分析对制得的纳米Ti O_2-Si O_2复合材料的微观结构进行了表征。结果表明,所制备的复合材料为锐钛矿二氧化钛结构,并可能生成二氧化硅嵌在二氧化钛的晶格中,材料比表面积高达387.9634m^2/g,孔隙分布适度。该纳米Ti O_2-Si O_2复合材料具有良好的比容量,水解法表现出更优的充放电性能,其中水解法制备的硅钛物质的量比为1∶1的样品首次放电比容量达987.4m Ah/g,100次循环后容量保持在76.1m Ah/g。
The method of hydrolysis and alcoholysis is applied to make ZiO2-SiO2 nanocomposites with different adding proportion, and then the obtained nanocomposites are doped with metal; at last a preparation method for preparing high-effective nanocomposites is got. The microstructure of TiO2-SiO2 nanocomposites are characterized by X-ray diffraction （XRD）, specific surface area （BET） and bore diameter analysis. The results show that the nanocomposites have the structure same as anatase titanium dioxide, and have the possibility to produce silicon dioxide embeds in titanium diox- ide＇s crystal lattice. The specific surface area of the nanocomposite is 387.9634m2/g, the pore distribution is uniform. This TiO2-SiO2 nanocomposite has a good specific capacity, and shows a better charge-discharge property when it is produced by hydrolysis method. The specific discharge capacity of the sample made by hydrolysis method with a molar ratio of titanium to silicon of 1：1 will reach 987.4mAh/g, and after 100 times of cycle it is 76.1mAh/g.
出处
《化学与粘合》
CAS
2017年第3期157-162,179,共7页
Chemistry and Adhesion
基金
国家自然科学基金面上项目(编号:21176047)
