Polypyrrole/carbon nanotube nanocomposite enhanced the electrochemical capacitance of flexible graphene film for supercapacitors

被引：184

作者：

Lu, Xiangjun ^{[1
]}

Dou, Hui ^{[1
]}

Yuan, Changzhou ^{[2
]}

Yang, Sudong ^{[1
]}

Hao, Liang ^{[1
]}

Zhang, Fang ^{[1
]}

Shen, Laifa ^{[1
]}

Zhang, Luojiang ^{[1
]}

Zhang, Xiaogang ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Nanjing 210016, Peoples R China

[2] Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan 243002, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2012年 / 197卷

基金：

中国国家自然科学基金;

关键词：

Graphene; Carbon nanotube; Polypyrrole; Supercapacitor; Flexible film; WALLED CARBON NANOTUBES; COMPOSITE FILMS; PERFORMANCE; OXIDE; ELECTRODES; POLYANILINE; FABRICATION; NANOSHEETS; DEVICES; ULTRACAPACITORS;

D O I：

10.1016/j.jpowsour.2011.08.112

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The flexible electrodes have important potential applications in energy storage of portable electronic devices for their powerful structural properties. In this work, unique flexible films with polypyrrole/carbon nanotube (PPy/CNT) composite homogeneously distributed between graphene (GN) sheets are successfully prepared by flow-assembly of the mixture dispersion of GN and PPy/CNT. In such layered structure, the coaxial PPy/CNT nanocables can not only enlarge the space between GN sheets but also provide pseudo-capacitance to enhance the total capacitance of electrodes. According to the galvanostatic charge/discharge analysis, the mass and volume specific capacitances of GN-PPy/CNT (52 wt% PPy/CNT) are 211 F g(-1) and 122 F cm(-3) at a current density of 0.2 A g(-1), higher than those of the GN film (73 F g(-1) and 79 F cm(-3)) and PPy/CNT (164 Fg(-1) and 67 F cm(-3)). Significantly, the GN-PPy/CNT electrode shows excellent cycling stability (5% capacity loss after 5000 cycles) due to the flexible GN layer and the rigid CNT core synergistical releasing the intrinsic differential strain of PPy chains during long-term charge/discharge cycles. (C) 2011 Elsevier By. All rights reserved.

引用

页码：319 / 324

页数：6

共 49 条

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