Graphene Hydrogels Deposited in Nickel Foams for High-Rate Electrochemical Capacitors

被引：426

作者：

Chen, Ji ^{[1
]}

Sheng, Kaixuan ^{[1
]}

Luo, Peihui ^{[1
]}

Li, Chun ^{[1
]}

Shi, Gaoquan ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

ADVANCED MATERIALS | 2012年 / 24卷 / 33期

关键词：

electrochemical capacitors; electrodes; graphene; hydrogels; nickel foam; supercapacitors; DOUBLE-LAYER CAPACITORS; CARBON NANOTUBES; HIGH-PERFORMANCE; SUPERCAPACITORS; FILMS; OXIDE; ELECTRODES; SHEETS;

D O I：

10.1002/adma.201201978

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Graphene hydrogel/nickel foam composite electrodes for high-rate electrochemical capacitors are produced by reduction of an aqueous dispersion of graphene oxide in a nickel foam (upper half of figure). The micropores of the hydrogel are exposed to the electrolyte so that ions can enter and form electrochemical double-layers. The nickel framework shortens the distances of charge transfer. Therefore, the electrochemical capacitor exhibits highrate performance (see plots).

引用

页码：4569 / 4573

页数：5

共 35 条

[1] Functional Composite Materials Based on Chemically Converted Graphene [J].

Bai, Hua ;

Li, Chun ;

Shi, Gaoquan .

ADVANCED MATERIALS, 2011, 23 (09) :1089-1115

[2] R&D considerations for the performance and application of electrochemical capacitors [J].

Burke, Andrew .

ELECTROCHIMICA ACTA, 2007, 53 (03) :1083-1091

[3] Electrochemical characterization of carbon nanotubes as electrode in electrochemical double-layer capacitors [J].

Chen, JH ;

Li, WZ ;

Wang, DZ ;

Yang, SX ;

Wen, JG ;

Ren, ZF .

CARBON, 2002, 40 (08) :1193-1197

[4]

Chen ZP, 2011, NAT MATER, V10, P424, DOI [10.1038/NMAT3001, 10.1038/nmat3001]

[5]

deLevie R., 1967, ADV ELECTROCHEMISTRY, V6, P329

[6] High power density supercapacitor electrodes of carbon nanotube films by electrophoretic deposition [J].

Du, Chunsheng ;

Pan, Ning .

NANOTECHNOLOGY, 2006, 17 (21) :5314-5318

[7] Laser Scribing of High-Performance and Flexible Graphene-Based Electrochemical Capacitors [J].

El-Kady, Maher F. ;

Strong, Veronica ;

Dubin, Sergey ;

Kaner, Richard B. .

SCIENCE, 2012, 335 (6074) :1326-1330

[8]

Hughes M, 2002, ADV MATER, V14, P382, DOI 10.1002/1521-4095(20020304)14:5<382::AID-ADMA382>3.0.CO

[9]

2-Y

[10] PREPARATION OF GRAPHITIC OXIDE [J].

HUMMERS, WS ;

OFFEMAN, RE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1958, 80 (06) :1339-1339

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