| Literature DB >> 19834246 |
Fenghua Li1, Jiangfeng Song, Huafeng Yang, Shiyu Gan, Qixian Zhang, Dongxue Han, Ari Ivaska, Li Niu.
Abstract
A one-step method was developed to fabricate conductive graphene/SnO2 (GS) nanocomposites in acidic solution. Graphite oxides were reduced by SnCl2 to graphene sheets in the presence of HCl and urea. The reducing process was accompanied by generation of SnO2 nanoparticles. The structure and composition of GS nanocomposites were confirmed by means of transmission electron microscopy, x-ray photoelectron and Raman spectroscopy. Moreover, the ultracapacitor characteristics of GS nanocomposites were studied by cyclic voltammograms (CVs) and electrical impedance spectroscopy (EIS). The CVs of GS nanocomposites are nearly rectangular in shape and the specific capacitance degrades slightly as the voltage scan rate is increased. The EIS of GS nanocomposites presents a phase angle close to pi/2 at low frequency, indicating a good capacitive behavior. In addition, the GS nanocomposites could be promisingly applied in many fields such as nanoelectronics, ultracapacitors, sensors, nanocomposites, batteries and gas storage.Entities:
Year: 2009 PMID： 19834246 DOI： 10.1088/0957-4484/20/45/455602
Source DB: PubMed Journal: Nanotechnology ISSN： 0957-4484 Impact factor: 3.874