Flexible graphene/MnO2 composite papers for supercapacitor electrodes

被引：386

作者：

Li, Zhangpeng ^{[1
,2
]}

Mi, Yongjuan ^{[1
,2
]}

Liu, Xiaohong ^{[1
]}

Liu, Sheng ^{[1
,2
]}

Yang, Shengrong ^{[1
]}

Wang, Jinqing ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100080, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 38期

基金：

中国国家自然科学基金;

关键词：

ELECTROCHEMICAL CAPACITORS; MANGANESE-DIOXIDE; CARBON NANOTUBES; FUEL-CELLS; PERFORMANCE; OXIDE; STORAGE; ENERGY; NANOSHEETS;

D O I：

10.1039/c1jm11941a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Graphene/manganese dioxide (MnO2) composite papers (GMCP) are fabricated via a simple three-step route: preparation of graphene oxide/MnO2 composite (GOMC) dispersion, subsequent vacuum filtration of GOMC dispersion to achieve graphene oxide/MnO2 composite paper (GOMCP), and finally thermal reduction of GOMCP to generate GMCP. The morphology and microstructure of the prepared samples are characterized by field-emission scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transformation infrared spectroscopy, thermal gravimetric analysis and X-ray photoelectron spectroscopy. Moreover, as a binder-free and flexible electrode material for supercapacitors, the electrochemical properties of the prepared GMCP are evaluated by cyclic voltammetry and galvanostatic charge/discharge tests. As a result, the specific capacitance of the GMCP with the MnO2 weight ratio of 24% (GMCP-24) reaches 256 F g(-1) at a current density of 500 mA g(-1) and also shows good cycle stability, indicating a promising potential application as an effective electrode material for supercapacitors.

引用

页码：14706 / 14711

页数：6

共 42 条

[1] Multi layered Nanoarchitecture of Graphene Nanosheets and Polypyrrole Nanowires for High Performance Supercapacitor Electrodes [J].