Journal
SOLID STATE IONICS
Volume 192, Issue 1, Pages 347-350Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2010.07.016
Keywords
Tubular PPy; Sulfur composite cathode; Lithium sulfur battery
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Sulfur was highly combined with two types of polypyrrole (PPy) in granular (G-PPy) and tubular(T-PPy) morphology by in-situ oxidation and co-heating methods. The morphology of polypyrrole shows a significant effect on the dispersion status and electrochemical behaviors of the sulfur. A stable capacity close to 500 mAh/g was maintained over 60 cycles for the S/T-PPy composite. Electrochemical measurement results suggest that the S/T-PPy composite is obviously superior to the S/G-PPy composite. It is suggested that the as-proposed tubular PPy could be a promising electric matrix for sulfur active host for a high energy density lithium-sulfur battery. (C) 2010 Elsevier B.V. All rights reserved.
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