Journal
ELECTROCHIMICA ACTA
Volume 53, Issue 24, Pages 7084-7088Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2008.05.022
Keywords
binder; gelatin; sulfur cathode; lithium-sulfur battery; electrochemical performances
Categories
Funding
- National 863 projects [2007AA03Z223]
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Gelatin, a natural biological macromolecule, was successfully used as a new binder in place of poly(ethylene oxide) (PEO) in the fabrication of the sulfur cathode in lithium-sulfur batteries. The structure and electrochemical performance of the two types of sulfur cathodes, with gelatin and PEO as binders, respectively, were compared in 1 M LiClO4 DME/DOL (V/V = 1/1) electrolyte. The results showed that the gelatin binder had multifunctional effects on the Sulfur cathode: it not only functioned as a highly adhesive agent and an effective dispersion agent for the cathode materials, but also an electrochemically stable binder. The gelatin binder-sulfur cathode achieved a high initial capacity of 1132 mAh g(-1), and remained at a reversible capacity of 408 mAh g(-1) after 50 cycles, all of which were better than with the PEO binder-sulfur cathode under the same conditions. (C) 2008 Elsevier Ltd. All rights reserved.
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