摘要
选用廉价、多孔、可再生的竹炭作为模板，结合溶胶-凝胶法成功地制备了纳米Co3O4。借助X-射线衍射（XRD）测试以及透射电镜（TEM）测试对所制备的纳米材料的晶型和形貌大小进行了表征。测试结果表明产物为球形立方相Co3O4，其平均直径为35nm左右。进一步通过循环伏安和恒流充放电测试研究了所得纳米Co3O4样品的电容器性能。测试结果表明，所得Co3O4电极在6mol／L KOH溶液中，-0．1-0．5V（vs Ag／AgCl）电位范围内，具有较好的循环稳定性，单电极的放电比容量达到了250F／g。
In this paper, Co3O4 nanoparticles were synthesized successfully by using low- cost, porous, reproducible bamboo charcoal as biologic template in conjunction with sol - gel method. The structure and morphology of the obtained samples were investigated by means of X - ray diffraction （ XRD ） and transmission electron microscopy （ TEM ）. The results showed that obtainted spherical samples were cubic phase Co3O4 with an average diameter of 35nm. The electrochemical capacitance performance of Co3O4 were characterized by cyclic vohammetry and galvanostatie charge/discharge measurements in 6 mol/L KOH electrolyte with the potential range from -0.1 to 0.5V （vs Ag/AgCl）. The results demonstrated that the as -synthesized Co3O4 nanoparticles had a good stability and cyclic performance. Its specific capacitance as single electrode was up to 250 F/g.
出处
《青岛农业大学学报（自然科学版）》
2009年第4期348-351,共4页
Journal of Qingdao Agricultural University(Natural Science)
关键词
竹炭模板
纳米Co3O4
电化学电容性能
bamboo charcoal template
Co3O4 nanoparticles
electrochemical capacitance performance
