Enhanced laser scribed flexible graphene-based micro-supercapacitor performance with reduction of carbon nanotubes diameter

被引：133

作者：

Wen, Fusheng ^{[1
]}

Hao, Chunxue ^{[1
]}

Xiang, Jianyong ^{[1
]}

Wang, Limin ^{[1
]}

Hou, Hang ^{[1
]}

Su, Zhibin ^{[1
]}

Hu, Wentao ^{[1
]}

Liu, Zhongyuan ^{[1
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

来源：

CARBON | 2014年 / 75卷

基金：

中国国家自然科学基金;

关键词：

ALL-SOLID-STATE; GRAPHITE OXIDE; CHIP; ELECTRODES; NANOWIRES;

D O I：

10.1016/j.carbon.2014.03.058

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：

By making use of the induced transformation of graphite oxide (GO) to laser scribed graphene (LSG), the coated layers of GO/carbon nanotubes (CNTs) hybrid powders on flexible polyethylene terephthalate sheets were patterned into LSG/CNTs micro-supercapacitors (LSG/CNTs-MSCs). In the presence of CNTs with a smaller diameter, the laser-scribed LSG/CNTs-MSC was found to yield the better energy storage performance. This dependence on the CNT diameter can be attributed to the role of CNTs in prevention of restacking of LSG layers and thus the increase of ion-accessible surface area. The CNTs with a smaller diameter can be more easily inserted between the LSG layers, thus inhibiting the restacldng phenomenon more effectively. By using the single-wall CNTs (SWCNTs) of 1-2 nm diameter, the laser-scribed LSG/SWCNTs-MSC was observed to exhibit the best electrochemical properties: The volumetric capacitance of 3.10 F cm(-3) at a current density of 1000 mA cm(-3), the volumetric energy density of 0.84 mW h cm(-3) and power density of 1.0W cm(-3), and long-term cycling stability. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：236 / 243

页数：8

共 34 条

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