Open AccessPreparation and performance of a sulfur/graphene composite for rechargeable lithium-sulfur battery
Author(s) -
Feifei Zhang,
Yunhui Dong,
Yun Huang,
Gang Huang,
Xinbo Zhang,
Limin Wang
Publication year - 2012
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/339/1/012003
Subject(s) - graphene , composite number , materials science , lithium–sulfur battery , sulfur , battery (electricity) , cathode , electrochemistry , scanning electron microscope , chemical engineering , lithium (medication) , carbon fibers , oxide , nanotechnology , composite material , chemistry , electrode , metallurgy , medicine , power (physics) , physics , quantum mechanics , endocrinology , engineering
The lithium-sulfur (Li-S) battery is a promising electrochemical system that has high theoretical capacity. The sulfur/graphene nanosheets (S/GNS) composite is prepared through thermal reduction between the sulfur (S) and graphene oxide (GO). The morphology and composition of the composite are analyzed by means of x-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopic (EDS) characterization. It is found that the element S distributed uniformly between the layers of GNS. Graphene with a two-dimensional structure of carbon atoms is employed as a conductive and absorbing agent for the S cathode materials of rechargeable Li-S battery. The S/GNS composite cathode shows a specific electrochemical capacity, which is about 1598 mAh g −1 S at the initial discharge and remains above 670 mAh g −1 after 80 cycles.