High-performance self-assembled graphene hydrogels prepared by chemical reduction of graphene oxide

被引：298

作者：

Sheng Kai-xuan ^{[1
]}

Xu Yu-xi ^{[1
]}

Li Chun ^{[1
]}

Shi Gao-quan ^{[1
]}

机构：

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

来源：

NEW CARBON MATERIALS | 2011年 / 26卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Self-assembly; Graphene; Chemical reduction; Hydrogels; Supercapacitor; GRAPHITE OXIDE; LARGE-AREA; FILMS; SHEETS; CONDUCTIVITY; GELS;

D O I：

10.1016/S1872-5805(11)60062-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three-dimensional self-assembled graphene hydrogels (SGHs) have been fabricated by chemical reduction of graphene oxide (GO) with sodium ascorbate. The SGHs were characterized by scanning electron microscopy, rheological tests, electrical conductivity measurements, X-ray photoelectron spectroscopy. X-ray diffraction, and Raman spectroscopy. Results indicate that the reduction of GO promotes the assembly of graphene sheets. The SGHs are electrically conductive (1 S.m(-1)) and mechanically strong and exhibit excellent electrochemical performance. In 1 mol . L-1 aqueous solution of. H2SO4, the specific capacitance of SGHs was measured to be about 240 F.g(-1) at a discharge current density of 1.2 A.g(-1).

引用

页码：9 / 15

页数：7

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