NF/rGO/Co_3O_4/NiO电极的制备及在超级电容器中的应用  

Preparation of NF/rGO/Co_3O_4/NiO Electrode and Its Application in Supercapacitor

作　　者：李莹莹[1] 张琦 张宜恒[2] 王磊[1] LI Yingying ZHANG Qi ZHANG Yiheng WANG Lei(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, 2. Chinesisch-Deutsche Technische Fakultat, Qingdao University of Science and Technology, Qingdao 266042, China Chin)

机构地区：[1]青岛科技大学化学与分子工程学院,青岛266042 [2]青岛科技大学中德科技学院,青岛266042

出　　处：《高等学校化学学报》2017年第11期2031-2037,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51372125;21571112);山东省自然科学基金(批准号:ZR2016EMP02)资助~~

摘　　要：以泡沫镍(NF)为集流体,在优化好的电位、时间和浓度下,将还原氧化石墨烯(rGO)、金属氧化物(Co_3O_4和NiO)直接生长在泡沫镍上,制备了NF/rGO/Co_3O_4和NF/rGO/Co_3O_4/NiO电极.运用三电极体系对电极材料进行了恒流充放电(GCD)和交流阻抗(EIS)等测试.结果表明,复合材料NF/rGO/Co_3O_4/NiO具有较高的比容量(电流密度为2 A/g时,比容量达到1188.6 F/g)和较好的循环稳定性(2000周充放电后,稳定性达到80.5%).该材料还具有较高的倍率性能,当电流密度由2 A/g增至12 A/g时,倍率性能仍能达到75.7%.The electrochemical deposition method was used to prepare NF/rGO/Co_3O_4 and NF/rGO/Co_3O_4/NiO electrodes（NF = nickel foam; rGO = reduced graphene oxide）. Here,with NF as a current collector,rGO,Co_3O_4 and NiO were grown on NF directly without any binder under specific conditions including optimized potential,time and concentration. NF/rGO/Co_3O_4 and NF/rGO/Co_3O_4/NiO electrodes were used as the electrode of supercapacitor,and three-electrode system was employed in cyclic voltammetry,galvanostatic charge-discharge and electrochemical impe-dance spectroscopy characterization of the electrodes. The results showed that the capacitance of NF/rGO/Co_3O_4/NiO electrode was 1188. 6 F/g at 2 A/g; its rate capability was 75. 7% when the current density varied from 2 A/g to 12 A/g; and its cycling stability was 80. 5% after2000 times. Compared with NF/rGO/Co_3O_4, the supercapacitor performance of NF/rGO/Co_3O_4/NiO electrode improved a lot,which can be attributed to the synergistic effect of Co_3O_4 and NiO. What＇s more,rGO could enhance the electroconductivity of electrodes to a large extent.

关 键 词：超级电容器 电化学沉积 还原型氧化石墨烯 金属氧化物 

分 类 号：O646[理学—物理化学]