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Open AccessArticle

Three-Dimensional S/CeO2/RGO Composites as Cathode Materials for Lithium–Sulfur Batteries

School of Materials Science and Engineering, Research Institute for Energy Equipment Materials, Hebei University of Technology, Tianjin 300130, China
Synergy Innovation Institute of GDUT, Heyuan 517000, China
Author to whom correspondence should be addressed.
Materials 2018, 11(9), 1720;
Received: 8 July 2018 / Revised: 8 September 2018 / Accepted: 9 September 2018 / Published: 14 September 2018
(This article belongs to the Section Energy Materials)
In this paper, the synthesis of the three-dimensional (3D) composite of spherical reduced graphene oxide (RGO) with uniformly distributed CeO2 particles is reported. This synthesis is done via a facile and large-scalable spray-drying process, and the CeO2/RGO materials are hydrothermally compounded with sulfur. The morphology, composition, structure, and electrochemical properties of the 3D S/CeO2/RGO composite are studied using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), Raman spectra and X-ray photoelectron spectroscopy (XPS), etc. The electrochemical performance of the composites as electrodes for lithium–sulfur batteries is evaluated. The S/CeO2/RGO composites deliver a high initial capacity of 1054 mAh g−1, and retain a reversible capacity of 792 mAh g−1 after 200 cycles at 0.1 C. Profiting from the combined effect of CeO2 and RGO, the CeO2/RGO materials effectively inhibit the dissolution of polysulfides, and the coating of spherical RGO improves the structural stability as well as conductivity. View Full-Text
Keywords: Lithium–sulfur battery; CeO2/RGO composite; electrochemical performance Lithium–sulfur battery; CeO2/RGO composite; electrochemical performance
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MDPI and ACS Style

Hao, Q.; Cui, G.; Tian, Y.; Tan, T.; Zhang, Y. Three-Dimensional S/CeO2/RGO Composites as Cathode Materials for Lithium–Sulfur Batteries. Materials 2018, 11, 1720.

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