有序介孔碳负载NiCo_2O_4电极的制备及其超电容性能  

Preparation of Ordered Mesoporous Carbon/NiCo_2O_4 Electrode and Its Electrochemical Capacitive Behavior

作　　者：车倩[1] 张方[1] 张校刚[1] 卢向军[1] 丁兵[1] 朱佳佳[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《物理化学学报》2012年第4期837-842,共6页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20873064);江苏省自然科学基金(BK2011030);高等学校博士学科点专项科研基金(20060287026)资助项目~~

摘　　要：以有序介孔碳(OMC)为载体,采用共沉淀法制备了OMC/NiCo2O4复合物.用X射线衍射(XRD)、傅里叶变换红外(FT-IR)光谱和透射电镜(TEM)研究其结构与形貌,发现NiCo2O4纳米颗粒均匀地负载在有序介孔碳上.循环伏安和恒流充放电测试表明,NiCo2O4质量分数为40%时,在1A·g-1的电流密度下,复合物电极的比电容可以达到577.0F·g-1,电流密度为8A·g-1时,比电容可以达到470.8F·g-1,并具有良好的循环稳定性.在2A·g-1的电流密度下,经过2000次循环后,比电容还可达到508.4F·g-1,电容保持率为92.7%.OMC/NiCo2O4 composite was prepared by co-precipitation with ordered mesoporous carbon （OMC）as a support.The crystalline structure and morphology of the composite were investigated by X-ray diffraction（XRD）,Fourier-transform infrared（FT-IR）spectroscopy,and transmission electron microscopy （TEM）.TEM images showed that NiCo2O4 was uniformly coated on the OMC.Cyclic voltammetry and galvanostatic charge-discharge were used to investigate the electrochemical performance of the OMC/ NiCo2O4 composite.The specific capacitances of the OMC/NiCo2O4 composite with a mass fraction of 40% NiCo2O4 were 577.0 F·g^-1 at a current density of 1 A·g^-1 and 470.8 F·g^-1 at 8 A·g^-1 .The specific capacitance remains at 508.4 F·g^-1 after 2000 cycles at a current density of 2 A·g^-1 ,with a capacitance retention of 92.7%.

关 键 词：超级电容器 有序介孔碳 NiCo2O4 共沉淀法 

分 类 号：O646.54[理学—物理化学]