文献类型：期刊文献

英文题名：Rapid microwave-assisted synthesis of graphene nanosheet/Co₃O₄ composite for supercapacitors

作者：Yan, Jun[1,3];Wei, Tong[1];Qiao, Wenming[2];Shao, Bo[1];Zhao, Qiankun[1];Zhang, Lijun[3];Fan, Zhuangjun[1]

机构：[1]Harbin Engn Univ, Key Lab Supertight Mat & Surface Technol, Minist Educ, Coll Mat Sci & Chem Engn, Harbin 150001, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[3]Harbin Engn Univ, Coll Automat, Harbin 150001, Peoples R China

年份：2010

卷号：55

期号：23

起止页码：6973

外文期刊名：ELECTROCHIMICA ACTA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000281994700007)】；

基金：This work was supported by the Key Project of Chinese Ministry of Education (No. 106011), the Fundamental Research Funds for the Central Universities (HEUCF101006) and the Key Project of National High-Tech Research and Development Plan of China (2008AA03A186).

语种：英文

外文关键词：Microwave-assisted; Graphene nanosheets; Cobalt oxide; Supercapacitor

摘要：Graphene nanosheet (GNS)/Co3O4 composite has been rapidly synthesized by microwave-assisted method. Field emission scanning electron microscopy and transmission electron microscopy observation reveals the homogeneous distribution of Co3O4 nanoparticles (3-5 rim in size) on graphene sheets. Electrochemical properties are characterized by cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. A maximum specific capacitance of 243.2 g(-1) has been obtained at a scan rate of 10 mV s(-1) in 6 M KOH aqueous solution for GNS/Co3O4 composite. Furthermore, the composite exhibits excellent long cycle life along with similar to 95.6% specific capacitance retained after 2000 cycle tests. (C) 2010 Elsevier Ltd. All rights reserved.