Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/94967
Title: Influences of graphene oxide support on the electrochemical performances of graphene oxide-MnO2 nanocomposites
Authors: Yang, Huanping
Jiang, Jian
Zhou, Weiwei
Lai, Linfei
Xi, Lifei
Lam, Yeng Ming
Shen, Zexiang
Khezri, Bahareh
Yu, Ting
Keywords: DRNTU::Engineering::Materials::Nanostructured materials
Issue Date: 2011
Source: Yang, H., Jiang, J., Zhou, W., Lai, L., Xi, L., Lam, Y. M., et al. (2011). Influences of graphene oxide support on the electrochemical performances of graphene oxide-MnO2 nanocomposites. Nanoscale research letters, 6, 531.
Series/Report no.: Nanoscale research letters
Abstract: 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.
URI: https://hdl.handle.net/10356/94967
http://hdl.handle.net/10220/8169
DOI: 10.1186/1556-276X-6-531
Rights: © 2011 Yang et al; licensee Springer.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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