Graphene materials preparation methods have dramatic influence upon their capacitance

被引：100

作者：

Buglione, Lucia ^{[1
]}

Chng, Elaine Lay Khim ^{[1
]}

Ambrosi, Adriano ^{[1
]}

Sofer, Zdenek ^{[2
]}

Pumera, Martin ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore 637371, Singapore

[2] Inst Chem Technol, Dept Inorgan Chem, CR-16628 Prague 6, Czech Republic

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2012年 / 14卷 / 01期

关键词：

Graphene; Capacitance; Graphene oxide; GRAPHITE OXIDE; CARBON NANOTUBES; ENERGY-STORAGE; ELECTROCHEMISTRY;

D O I：

10.1016/j.elecom.2011.09.013

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Graphene related materials are widely expected to play a major role as materials for the construction of supercapacitors. We demonstrate here that graphene oxides prepared by various well-established methods exhibit dramatically different capacitances. We exfoliated graphite oxide sonographically to graphene oxide (GO) and we reduced GO by chemical or electrochemical means to chemically reduced graphene oxide (CRGO) and electrochemically reduced graphene oxide (ERGO); in addition, graphite oxide was thermally exfoliated leading to thermally reduced graphene oxide (TRGO). We found clear dependence of weight specific capacitance upon amount of oxygen containing groups presented on the surface of these graphenes. GO exhibits the lowest and TRGO the highest values of weight specific capacitance. (C) 2011 Elsevier By. All rights reserved.

引用

页码：5 / 8

页数：4

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