以四元微乳液(水/十六烷基三甲基溴化铵/环己烷/正戊醇)为介质,在100℃水热环境下成功地合成了具有蒲公英状、剑麻状以及捆绑式结构的前驱化合物,经300℃焙烧可得结构保持的Co3O4.X-射线衍射(XRD)、扫描电镜(SEM)测试表明,所得样品为立方尖晶石结构,同时水热反应时间对材料的形貌有很大的影响.循环伏安和恒电流充放电等电化学测试均表明,水热反应6h、经热处理后得到Co3O4具有较好的电化学电容行为,单电极比电容可达340F·g^-1.
Uniform dandelion-like, sisal-like and bindle-like architectures of compounds were successfully prepared in water/hexadecyltrimethyl ammonium bromide (CTAB)/hexane/n-pentanol quaternary microemulsion under hydrothermal conditions at 100 ℃, and morphologies of the three pyrolysis products at 300℃ were similar to those of their corresponding precursors. X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed that assynthesized Co3O4 possessed cubic spinel-type structure. The hydrothermal time played an important role in the morphologies of the materials. Electrochemical capacitance properties of the prepared Co3O4 were investigated by means of cyclic voltammetry and galvanostatic charge/discharge measurements. When the hydrothermal time increased to 6 h, the obtained Co3O4 had the excellent electrochemical capacitance with the highest capacitance of 340 F·g^-1.