Simultaneous Fabrication of Graphene-Cobalt Hydroxide Nanocomposites and their Electrochemical Properties
Graphene sheets with unique nanostructure and fascinating properties are attractive nanoscale building blocks for new composites. This letter reports a facile soft chemical approach for the fabrication of graphene-Co(OH)2 nanocomposites in a water-isopropanol system. By virtue of the simultaneous formation of OH- and reducing agents such as HS- and H2S due to the strong inclination of Na2S to be hydrolyzed in aqueous solution, which enables the occurrence of the deposition of Co2+ and deoxygenation of graphite oxide (GO) at the same time. Remarkably that the electrochemical specific capacitance of the as-prepared nanocomposite reaches as high as 1020.1 F·g-1, leading a significant improvement in relative to each individual counterpart (198.9 and 789.7 F·g-1 for graphene and Co(OH)2 respectively). Furthermore, it should be mentioned that our current approach has a great potential to be readily applied to the preparation of other graphene-based nano-hybrids.
Graphene Graphite oxide Cobalt hydroxide Na2S Electrochemical properties
Sheng Chen Junwu Zhu Xin Wang
Key Laboratory for Soft Chemistry and Functional Materials (Nanjing University of Science and Techno
国内会议
长沙
英文
1-9
2010-06-19（万方平台首次上网日期，不代表论文的发表时间）