期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 133, 期 1, 页码 363-368出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.01.039
关键词
NiO; Graphene; Composite; Solvothermal; Supercapacitor
资金
- National Natural Science Foundation of China [20963009, 21163017]
- Gansu Science and Technology Committee [0803RJA005]
- Provincial Education Department of Gansu
Reduced graphene oxide (RGO)-NiO composites have been fabricated by a simple solvothermal route starting with graphite oxide (GO). The morphology, composition and microstructure of the as-obtained samples are systematically characterized by thermogravimetric (TG) analysis, X-ray diffraction (XRD), and field emission scanning electron microscopy (FESEM). Moreover, the electrochemical performances of composites were evaluated by cyclic voltammogram (CV) and galvanostatic charge-discharge. Interestingly, it was found that the electrochemical performance of the composites could be affected by the mass ratio between RGO and NiO. The composite with the mass ratio up to 79:21 (NiO:RGO) exhibits the highest specific capacitance of 576 Fg(-1) at 1 A g(-1), which is much higher than that of pure NiO (240 Fg(-1)) and pure RGO (98 F g(-1)). In addition, the cycling measurements showed that RGO-NiO composite exhibited excellent cycling stability with no decay in the available capacity over 1100 cycles. The enhancement in specific capacitance and cycling stability may be attributed to the increased electrode conductivity owing to RGO network, the increased effective interfacial area between NiO and the electrolyte, as well as the contact area between NiO and RGO. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据