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

Literature Information

Publication Date 2012-09-12
DOI 10.1039/C2CP42866K
Impact Factor 3.676
Authors

Liwen Ji, Per-Anders Glans, Yuegang Zhang, Junfa Zhu, Jinghua Guo


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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.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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