Thin films of carbon nanotubes and chemically reduced graphenes for electrochemical micro-capacitors

被引：241

作者：

Byon, Hye Ryung ^{[1
,2
,4
]}

Lee, Seung Woo ^{[3
,4
]}

Chen, Shuo ^{[1
,2
,4
]}

Hammond, Paula T. ^{[3
]}

Shao-Horn, Yang ^{[1
,2
,4
]}

机构：

[1] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[3] MIT, Dept Chem Engn, Cambridge, MA 02139 USA

[4] MIT, Electrochem Energy Lab, Cambridge, MA 02139 USA

来源：

CARBON | 2011年 / 49卷 / 02期

基金：

美国国家科学基金会;

关键词：

ENERGY-STORAGE; FABRICATION; ELECTRODES; PAPER;

D O I：

10.1016/j.carbon.2010.09.042

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 the making of chemically reduced graphene (CRG) sheets separated by layer-by-layer-assembled multi-walled carbon nanotubes (MWCNTs) for electrochemical micro-capacitor applications. Submicron thin films of amine-functionalized MWCNTs (MWCNT-NH2) and CRG derived from graphene oxides, were shown to be cross-linked with amide bonds having high packing densities of similar to 70%. These carbon-only electrodes were found to have large volumetric capacitance of similar to 160 F/cm(electrode)(3) in an acidic electrolyte (0.5 M H2SO4). The electrode capacitance in a neutral electrolyte (1 M KCl) was found much lower, which supported the hypothesis that the observed high capacitances in the acidic electrolyte can be attributed primarily to redox reactions between protons and surface oxygen-containing groups on carbon. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：457 / 467

页数：11

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