Rapid microwave-assisted synthesis of graphene nanosheet/Co3O4 composite for supercapacitors

被引：487

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

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 23期

关键词：

Microwave-assisted; Graphene nanosheets; Cobalt oxide; Supercapacitor; LITHIUM-ION BATTERIES; ELECTROCHEMICAL CAPACITORS; RAMAN-SPECTROSCOPY; GRAPHITE OXIDE; REDUCTION; STORAGE;

D O I：

10.1016/j.electacta.2010.06.081

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

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.

引用

页码：6973 / 6978

页数：6