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Title:
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Influences of graphene oxide support on the electrochemical performances of graphene oxide-MnO2 nanocomposites.
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Author:
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Yang, Huanping.; Jiang, Jian.; Zhou, Weiwei.; Lai, Linfei.; Xi, Lifei.; Lam, Yeng M.; Shen, Zexiang.; Khezri, Bahareh.; Yu, Ting.
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Copyright year:
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2011 |
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Abstract:
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MnO2 supported on graphene oxide (GO) made from different graphite materials has been synthesized and further
investigated as electrode materials for supercapacitors. The structure and morphology of MnO2-GO
nanocomposites are characterized by X-ray diffraction, X-ray photoemission spectroscopy, scanning electron
microscopy, transmission electron microscopy, Raman spectroscopy, and Nitrogen adsorption-desorption. As
demonstrated, the GO fabricated from commercial expanded graphite (denoted as GO(1)) possesses more
functional groups and larger interplane gap compared to the GO from commercial graphite powder (denoted as
GO(2)). The surface area and functionalities of GO have significant effects on the morphology and electrochemical
activity of MnO2, which lead to the fact that the loading amount of MnO2 on GO(1) is much higher than that on
GO(2). Elemental analysis performed via inductively coupled plasma optical emission spectroscopy confirmed
higher amounts of MnO2 loading on GO(1). As the electrode of supercapacitor, MnO2-GO(1) nanocomposites show
larger capacitance (307.7 F g-1) and better electrochemical activity than MnO2-GO(2) possibly due to the high
loading, good uniformity, and homogeneous distribution of MnO2 on GO(1) support. |
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Subject:
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DRNTU::Engineering::Materials::Nanostructured materials. |
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Type:
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Journal Article |
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Series/ Journal Title:
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Nanoscale research letters |
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School:
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School of Materials Science and Engineering |
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Rights:
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© 2011 Yang et al; licensee Springer. |
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Version:
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Published version |
