One-pot Hydrothermal Synthesis of Novel NiCoO2/Reduced Graphene Oxide Composites for Supercapacitors

作     者：WANG Hongzhi SHI Xin SHI Yulei ZHANG Weiguo YAO Suwei 

作者机构：Department of Applied Chemistry School of Chemical Engineering and Technology Tianjin University Tianjin 300350 P. R. China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2017年第33卷第4期

页      面：638-642页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 07[理学] 08[工学] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：Supported by the Natural Science Foundation of Tianjm City  China（No. 11JCYBJC01900）. 

主　　题：NiCoO2 rGO Composite Faradaic electrode Supercapacitor 

摘      要：Novel NiCoO2/rGO composites with a structure of NiCoO2 nanoparticles anchored on layers of reduced graphene oxide（rGO） were synthesized via a simple one-pot hydrothermal method and were used as faradaic electrodes for supercapacitors. The microstructures of NiCoO2/rGO composites were characterized by means of field emission scanning electron microscopy（FESEM）, transmission electron microscopy（YEM）, X-ray diffraction（XRD） and thermogravimetric analysis（TGA）. When acting as faradaic electrodes for supercapacitors, NiCoO2/rCK） compo- sites exhibited a specific capacity of 288 C/g at the current density of 2 A/g and maintained 139.98 C/g at 20 A/g. High capacity retention ratios up to 88% could be achieved after 1000 cycles at a current density of 2 A/g. The out- standing cycling stability was primarily attributed to the combination of mixed transition metal oxides and rGO, which not only maintains a high electrical conductivity for the overall electrode but also prevents the aggregation and volume expansion of electrochemical materials during the cycling processes.