Preparation of activated graphene and effect of activation parameters on electrochemical capacitance

被引：92

作者：

Murali, Shanthi

Potts, Jeffrey R.

Stoller, Scott

Park, Joono

Stoner, Meryl D.

Zhang, Li Li

Zhu, Yanwu

Ruoff, Rodney S. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA

来源：

CARBON | 2012年 / 50卷 / 10期

基金：

美国国家科学基金会;

关键词：

CHEMICAL ACTIVATION; ULTRACAPACITORS; NAOH; KOH;

D O I：

10.1016/j.carbon.2012.03.014

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：

Activation parameters such as temperature and the amount of potassium hydroxide (KOH) were varied during the synthesis of activated microwave-exfoliated graphite oxide (a-MEGO) and the effects of these parameters on the specific surface area of a-MEGO and electrochemical capacitance of a-MEGO electrodes were investigated. At 800 degrees C and a KOH/MEGO mass ratio of 6.5, a maximum specific surface area of 3100 m(2)/g was obtained and a high specific capacitance of 172 F/g (at 1 A/g constant current and 3.5 V maximal voltage) was measured in a two-electrode cell with a-MEGO electrodes in an organic electrolyte. (C) 2012 Elsevier Ltd. All rights reserved.

引用

收藏

页码：3482 / 3485

页数：4

相关论文

共 11 条

[1] Adsorption of gases in multimolecular layers [J].

Brunauer, S ;

Emmett, PH ;

Teller, E .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1938, 60 :309-319

[2] Understanding chemical reactions between carbons and NaOH and KOH -: An insight into the chemical activation mechanism [J].

Lillo-Ródenas, MA ;

Cazorla-Amorós, D ;

Linares-Solano, A .

CARBON, 2003, 41 (02) :267-275

[3]

Marsh H, 2006, ACTIVATED CARBON, P1

[4] Materials science - Electrochemical capacitors for energy management [J].

Miller, John R. ;

Simon, Patrice .

SCIENCE, 2008, 321 (5889) :651-652

[5] Role of chemical activation in the development of carbon porosity [J].

Molina-Sabio, M ;

Rodríguez-Reinoso, F .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2004, 241 (1-3) :15-25

[6] KOH and NaOH activation mechanisms of multiwalled carbon nanotubes with different structural organisation [J].

Raymundo-Piñero, E ;

Azaïs, P ;

Cacciaguerra, T ;

Cazorla-Amorós, D ;

Linares-Solano, A ;

Béguin, F .

CARBON, 2005, 43 (04) :786-795

[7] Materials for electrochemical capacitors [J].

Simon, Patrice ;

Gogotsi, Yury .

NATURE MATERIALS, 2008, 7 (11) :845-854

[8] Graphene-Based Ultracapacitors [J].

Stoller, Meryl D. ;

Park, Sungjin ;

Zhu, Yanwu ;

An, Jinho ;

Ruoff, Rodney S. .

NANO LETTERS, 2008, 8 (10) :3498-3502

[9] Best practice methods for determining an electrode material's performance for ultracapacitors [J].

Stoller, Meryl D. ;

Ruoff, Rodney S. .

ENERGY & ENVIRONMENTAL SCIENCE, 2010, 3 (09) :1294-1301

[10] Carbon-Based Supercapacitors Produced by Activation of Graphene [J].

Zhu, Yanwu ;

Murali, Shanthi ;

Stoller, Meryl D. ;

Ganesh, K. J. ;

Cai, Weiwei ;

Ferreira, Paulo J. ;

Pirkle, Adam ;

Wallace, Robert M. ;

Cychosz, Katie A. ;

Thommes, Matthias ;

Su, Dong ;

Stach, Eric A. ;

Ruoff, Rodney S. .

SCIENCE, 2011, 332 (6037) :1537-1541