泡沫镍负载Co_3O_4纳米线制备及其超电容性能研究  

Preparation of Co_3O_4 nanowire grown in nickel foam and its application as a supercapacitor

作　　者：韩红彦[1] 石蕾[2] 蒋小华[1] 崔立山[1] 

机构地区：[1]中国石油大学(北京)理学院,北京102249 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《化工新型材料》2015年第12期30-32,35,共4页New Chemical Materials

基　　金：国家自然科学基金资助项目(50903006)

摘　　要：以硝酸钴、尿素为原料,泡沫镍为基底,通过水热、煅烧法制备了Co_3O_4纳米线阵列,并采用扫描电子显微镜、透射电子显微镜及X射线衍射对Co_3O_4纳米线的微观形貌及晶体结构进行了分析。采用电化学工作站测试了Co_3O_4纳米线阵列作为超级电容器电极的电化学性能。结果显示:Co_3O_4纳米线阵列作为超级电容器电极材料在5mA/cm^2的电流密度下,具有高达1670F/g的比电容。同时显示出良好的倍率特性和较高的循环稳定性,应用前景良好。Co3O4nanowires was prepared via hydro-thermal treatment and calcination of mixture of Co（NO3）2and CO（NH2）2in sequence with the nickel foam as carrier.X-ray diffraction（XRD）,scanning electron microscopy（SEM）,and transmission electron microscopy（TEM）were employed to characterize the structure and micro morphology of nanowires.The electrochemical property of nanowires arrays as electrode for high performance supercapacitors was characterized by electrochemical workstation.The electrode of nanowires displaied the specific capacitance as high as 1670F/g at the current density of 5mA/cm-2.Additionally,the electrode of Co3O4 nanowires possessed high rate capacitance and excellent cycle stability which reserved around 85% of capacitance compared with its initial value after 1500 cycles at a charge-discharge current density of 30mA/cm-2 according to the test result.

关 键 词：CO3O4 纳米线 超级电容器 泡沫镍 

分 类 号：TQ138.12[化学工程—无机化工] TM53[电气工程—电器]