One-Step Synthesis of Graphene-Cobalt Hydroxide Nanocomposites and Their Electrochemical Properties

被引：265

作者：

Chen, Sheng ^{[1
]}

Zhu, Junwu ^{[1
]}

Wang, Xin ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Key Lab Soft Chem & Funct Mat, Minist Educ, Nanjing 210094, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 27期

基金：

高等学校博士学科点专项科研基金;

关键词：

EXFOLIATED GRAPHITE OXIDE; CHEMICAL-REDUCTION; ELECTRODE MATERIAL; RUTHENIUM OXIDE; SHEETS; NANOSHEETS; FILMS; DISPERSIONS; CAPACITORS; DEPOSITION;

D O I：

10.1021/jp1048474

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：

The well-documented novel performances of graphene make it a potential candidate for a wide range of utilizations, driving research into exploiting unusual properties of this wonder material. This paper reports a facile soft chemical approach to fabricate graphene-Co(OH)(2) nanocomposites in a water-isopropanol system. Generally the depositing agent (OH-) and some reducing agents (such as HS- and H2S) could be produced from the hydrolyzation of Na2S in aqueous solution. Therefore utilizing Na2S as a precursor could enable the occurrence of the deposition of Co2+ and the deoxygenation of graphite oxide (GO) at the same time. Remarkably the electrochemical specific capacitance of the graphene-Co(OH)(2) nanocomposite reaches a value as high as 972.5 F.g(-1), leading to a significant improvement in relation to each individual counterpart (137.6 and 726.1 F.g(-1) for graphene and Co(OH)(2), respectively). The feeding ratios between Co(OH)(2) and graphene oxide have a pronounced effect on their electrochemical activities.

引用

页码：11829 / 11834

页数：6

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