One-step synthesis of graphene/SnO2 nanocomposites and its application in electrochemical supercapacitors

被引：393
作者：
Li, Fenghua [1 ,2 ]
Song, Jiangfeng [1 ,2 ]
Yang, Huafeng [1 ,2 ]
Gan, Shiyu [1 ,2 ]
Zhang, Qixian [1 ,2 ]
Han, Dongxue [1 ,2 ,3 ]
Ivaska, Ari [3 ]
Niu, Li [1 ,2 ,3 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Changchun 130022, Peoples R China
[3] Abo Akad Univ, Proc Chem Ctr, Analyt Chem Lab, FI-20500 Turku, Finland
来源：
NANOTECHNOLOGY | 2009年 / 20卷 / 45期
关键词：
GRAPHITE OXIDE; AQUEOUS DISPERSIONS; CARBON MATERIALS; REDUCTION; STORAGE; NANOPARTICLES; PERFORMANCE; NANOSHEETS; SHEETS;
D O I：
10.1088/0957-4484/20/45/455602
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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 p/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.
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页数：6
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