Electrochemical behaviors of graphene-ZnO and graphene-SnO2 composite films for supercapacitors

被引：369

作者：

Lu, Ting ^{[1
]}

Zhang, Yanping ^{[1
]}

Li, Haibo ^{[1
]}

Pan, Likun ^{[1
]}

Li, Yinlun ^{[2
]}

Sun, Zhuo ^{[1
]}

机构：

[1] E China Normal Univ, Dept Phys, Minist Educ, Engn Res Ctr Nanophoton & Adv Instrument, Shanghai 200062, Peoples R China

[2] Qinghai Normal Univ, Dept Phys, Qinghai 810008, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 13期

关键词：

Graphene; ZnO; SnO2; Supercapacitors; Composite films; AQUEOUS DISPERSIONS; ELECTRODES; OXIDE; NANOCOMPOSITE; NANOSHEETS;

D O I：

10.1016/j.electacta.2010.02.095

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Graphene, graphene-ZnO and graphene-SnO2 films were successfully synthesized and used as electrode materials for electrochemical supercapacitors, respectively. The screen-printing approach was employed to fabricate graphene film on graphite substrate while the ZnO and SnO2 were deposited on graphene films by ultrasonic spray pyrolysis. The electrochemical performances of these electrodes were comparatively analyzed through electrochemical impedance spectrometry, cyclic voltammetry and chronopotentiometry tests. The results showed that the incorporation of ZnO or SnO2 improved the capacitive performance of graphene electrode. Graphene-ZnO composite electrode exhibited higher capacitance value (61.7 Fig) and maximum power density (4.8 kW/kg) as compared with graphene-SnO2 and pure graphene electrodes. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：4170 / 4173

页数：4

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