球形纳米Fe_3O_4的制备及超级电容性能研究  

Preparation and Capacitance Performance of Nanosized Spherical Fe_3O_4

作　　者：陈洁[1] 黄可龙[1] 刘素琴[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《无机化学学报》2008年第4期621-626,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No50542004)

摘　　要：采用双氧水氧化水热法制备Fe3O4,通过IR、XRD和SEM对样品的结构和性能进行表征。结果表明,产物为形貌规整的球形,平均粒径为25nm。通过恒流充放电、循环伏安和交流阻抗等方法研究Fe3O4电极的电容性能。电化学测试表明,在1mo·lL-1Na2SO3溶液中,-1.2～0.2V(vsSCE)电位范围内,Fe3O4具有良好的电容性能及循环稳定性。在100mA·g-1电流密度下,单电极比容量为113.01F·g-1,1000次循环后样品放电比容量保持72.9%。Nano-sized Fe3O4 powder was prepared through an oxygenation-hydrothermal method. The structure and morphology of the product were characterized by IR, XRD and SEM. Results show that the as-prepared powder has regularly spherical morphology, and the average size of product is about 25 nm. Electrochemical properties of Fe3O4 electrode were performed by galvanostatic charge/discharge, cyclic voltammeter （CV） and electrochemical impedance spectrometry （EIS）. The results indicate that the Fe3O4 electrode shows good capacitive behaviour and cycling stability in 1 mol·L^-1 Na2SO3 electrolyte with the potential range of-1.2-0.2 V （vs SCE）. The specific capacitance of the material as a single electrode is 113.01 F·g^-1 at the current density of 100 mA·g^-1, and 72.9% discharge specific capacitance is maintained after 1 000 cycles.

关 键 词：FE3O4 水热法 超级电容器 电容性能 

分 类 号：O614.811[理学—无机化学] O613.3[理学—化学]