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

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