One-step fabrication and capacitive behavior of electrochemical double layer capacitor electrodes using vertically-oriented graphene directly grown on metal

被引：161

作者：

Bo, Zheng ^{[1
,2
]}

Wen, Zhenhai ^{[2
]}

Kim, Haejune ^{[2
]}

Lu, Ganhua ^{[2
]}

Yu, Kehan ^{[2
]}

Chen, Junhong ^{[2
]}

机构：

[1] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Inst Thermal Power Engn, Hangzhou 310027, Zhejiang, Peoples R China

[2] Univ Wisconsin, Dept Mech Engn, Milwaukee, WI 53211 USA

来源：

CARBON | 2012年 / 50卷 / 12期

基金：

美国国家科学基金会;

关键词：

CARBON MATERIALS; SUPERCAPACITOR; NANOSHEETS; PERFORMANCE; DEPOSITION; NANOTUBES; NANOWALLS; ENERGY; FIELD;

D O I：

10.1016/j.carbon.2012.05.014

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：

We report on a one-step binder-free fabrication method for electrochemical double layer (EDL) capacitor electrodes consisting of vertically-oriented graphene uniformly grown on a metallic current collector. The double-layer capacitive behavior of the resulting electrode is studied in both aqueous and organic electrolytes. Compared with conventional graphene-based EDL capacitor electrode fabrication methods, this method offers the following advantages: (a) no need to use a binder, (b) open channels for better ion access, and (c) exposed edge planes for improved material wettability. These unique features lead to excellent capacitive behavior in organic electrolytes, including a specific capacitance slightly higher than that in aqueous electrolytes at the same potential scan rate and a high knee frequency (similar to 3174 Hz in the current work). (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：4379 / 4387

页数：9

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