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Nano-structure tin/nitrogen-doped reduced graphene oxide composites as high capacity lithium-ion batteries anodes

Title
Nano-structure tin/nitrogen-doped reduced graphene oxide composites as high capacity lithium-ion batteries anodes
Authors
Jarulertwathana N.Laokawee V.Susingrat W.Hwang S.-J.Sarakonsri T.
Ewha Authors
황성주
SCOPUS Author ID
황성주scopus
Issue Date
2017
Journal Title
Journal of Materials Science: Materials in Electronics
ISSN
0957-4522JCR Link
Citation
vol. 28, no. 24, pp. 18994 - 19002
Publisher
Springer New York LLC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Tin/graphene-based composites were synthesized as easy-to-prepare alternative anode materials in lithium-ion batteries (LIBs). Reduced graphene oxide (rGO) was obtained from the oxidation of pristine graphite by modified Hummers’ method followed by thermal treatment at 500 °C for 5 h under N2 atmosphere. Nitrogen-doped graphene (NrGO) sheets were prepared via thermal annealing of rGO and melamine (1:5 by weight) at 800 °C for 1 h under N2 environment. The chemical reduction method was used to synthesize the composites. The Sn content in Sn/rGO and Sn/NrGO was varied as 10 and 20 wt%. The rGO and NrGO supporting materials had large surface areas and were exfoliated graphite structure. The powder X-ray diffraction patterns showed that Sn/rGO and Sn/NrGO composites contained Sn and graphene-based supporter. The electron microscopic measurements granted the composite morphology, in which they consisted of small Sn particles anchored on rGO and NrGO surfaces. The 20Sn/rGO and 20Sn/NrGO composites delivered large reversible specific capacities of 793 and 755 mAh g− 1, respectively, at a current density of 100 mA g− 1. The prepared composites also provide high stability, indicating the promising anode performance for LIBs. © 2017, Springer Science+Business Media, LLC.
DOI
10.1007/s10854-017-7853-y
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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