Sulfur/graphitic hollow carbon sphere nano-composite as a cathode material for high-power lithium-sulfur battery
- Sulfur/graphitic hollow carbon sphere nano-composite as a cathode material for high-power lithium-sulfur battery
- 신언성; 김민섭; 조원일; 오시형
- Lithium-sulfur battery; Hollow carbon sphere; Graphitic carbon; Nano-composite; Cathode
- Issue Date
- Nanoscale research letters
- VOL 8, NO 1, 343-1-343-8
- 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.
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