物理化学学报 >> 2008, Vol. 24 >> Issue (06): 1105-1110.doi: 10.3866/PKU.WHXB20080634

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不同形貌Co3O4的水热-微乳液法制备及其电化学性能

叶向果; 张校刚; 米红宇; 杨苏东   

  1. 新疆大学应用化学研究所, 乌鲁木齐 830046; 南京航空航天大学材料科学与技术学院, 南京 210016
  • 收稿日期:2007-12-12 修回日期:2008-03-18 发布日期:2008-06-03
  • 通讯作者: 张校刚 E-mail:azhangxg@163.com

Hydrothermal Microemulsion Synthesis of Co3O4 with Different Morphologies and Their Electrochemical Capacitance

YE Xiang-Guo; ZHANG Xiao-Gang; MI Hong-Yu; YANG Su-Dong   

  1. Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, P. R. China; College of Material Science &Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
  • Received:2007-12-12 Revised:2008-03-18 Published:2008-06-03
  • Contact: ZHANG Xiao-Gang E-mail:azhangxg@163.com

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摘要： 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6 h、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340 F·g-1.

关键词: 水热-微乳液, Co3O4, 电化学电容器

Abstract: 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 as-synthesized 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 Co3O4were 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.

Key words: Hydrothermal-microemulsion, Cobalt oxide, Electrochemical capacitor

MSC2000: 

  • O646