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Issue 39, 2012
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Electronic structure and chemical bonding of a graphene oxide–sulfur nanocomposite for use in superior performance lithium–sulfur cells

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Abstract

We have investigated the chemical bonding and electronic structure of a graphene oxide–sulfur (GO–S) nanocomposite by X-ray Photoelectron Spectroscopy (XPS), Near-edge X-ray Absorption Fine Structure (NEXAFS), and X-ray Emission Spectroscopy (XES). The nanocomposite, synthesized by a chemical reaction–deposition approach followed by low temperature thermal treatment, is composed of a thin and uniform sulfur film anchored on a graphene oxide (GO) sheet. The GO is partially reduced during the chemical synthesis process, resulting in the appearance of a C–H bond and an increase in the ordering of GO sheets. The moderate chemical interactions between sulfur and GO can preserve the intrinsic electronic structure of GO, and on the other hand, immobilize the sulfur on the GO sheets, which should be responsible for the excellent electrochemical performance of the lithium–sulfur cells by using the GO–S nanocomposite as the cathode material.

Graphical abstract: Electronic structure and chemical bonding of a graphene oxide–sulfur nanocomposite for use in superior performance lithium–sulfur cells

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Publication details

The article was received on 16 Aug 2012, accepted on 16 Aug 2012 and first published on 12 Sep 2012


Article type: Paper
DOI: 10.1039/C2CP42866K
Phys. Chem. Chem. Phys., 2012,14, 13670-13675

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    Electronic structure and chemical bonding of a graphene oxide–sulfur nanocomposite for use in superior performance lithium–sulfur cells

    L. Zhang, L. Ji, P. Glans, Y. Zhang, J. Zhu and J. Guo, Phys. Chem. Chem. Phys., 2012, 14, 13670
    DOI: 10.1039/C2CP42866K

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