Effects of sulfur doping on graphene-based nanosheets for use as anode materials in lithium-ion batteries

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Graphene-based nanosheets (GNS) have been studied for use in electrochemical energy storage devices. A deeper understanding about the system is required for achieving enhanced power output and high energy storage. The effects of sulfur doping on the electrochemical properties of GNS are studied for their use as an anode material in lithium-ion batteries. Sulfur doping in GNS contributes to the high specific capacity by providing more lithium storage sites due to Faradaic reactions. In addition, superior rate performance of sulfur-doped GNS (S-GNS) is achieved through the improved electrical conductivity of S-GNS (1743 S m(-1)), which is two orders of magnitude higher than that of GNS (32 S m(-1)). In addition, good cyclic stability of S-GNS is maintained even after 500 cycles at a high current density of 1488 mA g(-1) (4 C).
Publisher
ELSEVIER SCIENCE BV
Issue Date
2014-09
Language
English
Article Type
Article
Keywords

BORON-NITRIDE; LI STORAGE; CARBON; OXIDE; INSERTION; PERFORMANCE; ELECTRODES

Citation

JOURNAL OF POWER SOURCES, v.262, pp.79 - 85

ISSN
0378-7753
DOI
10.1016/j.jpowsour.2014.03.084
URI
http://hdl.handle.net/10203/189266
Appears in Collection
NT-Journal Papers(저널논문)
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