Sulfur/graphitic hollow carbon sphere nano-composite as a cathode material for high-power lithium-sulfur battery

Title
Sulfur/graphitic hollow carbon sphere nano-composite as a cathode material for high-power lithium-sulfur battery
Authors
신언성김민섭조원일오시형
Keywords
Lithium-sulfur battery; Hollow carbon sphere; Graphitic carbon; Nano-composite; Cathode
Issue Date
2013-08
Publisher
Nanoscale research letters
Citation
VOL 8, NO 1, 343-1-343-8
Abstract
The intrinsic low conductivity of sulfur which leads to a low performance at a high current rate is one of the most limiting factors for the commercialization of lithium-sulfur battery. Here, we present an easy and convenient method to synthesize a mono-dispersed hollow carbon sphere with a thin graphitic wall which can be utilized as a support with a good electrical conductivity for the preparation of sulfur/carbon nano-composite cathode. The hollow carbon sphere was prepared from the pyrolysis of the homogenous mixture of the mono-dispersed spherical silica and Fe-phthalocyanine powder in elevated temperature. The composite cathode was manufactured by infiltrating sulfur melt into the inner side of the graphitic wall. The electrochemical cycling shows a capacity of 425 mAh g−1 at 3 C current rate which is more than five times larger than that for the sulfur/carbon black nano-composite prepared by simple ball milling.
URI
http://pubs.kist.re.kr/handle/201004/45915
ISSN
19317573
Appears in Collections:
KIST Publication > Article
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