Journal
JOURNAL OF POWER SOURCES
Volume 267, Issue -, Pages 542-546Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.05.057
Keywords
Lithium sulfur battery; Sulfur cathode; Functional interlayer; Conductive polymer; Cycle performance
Funding
- NSFC [51373195, 51372262, 51272267]
- Science and Technology Commission of Shanghai Municipality [08DZ2210900]
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Polypyrrole functional interlayer is in-situ fabricated uniformly onto the surface of sulfur cathode to inhibit the dissolution of lithium polysulfides and protect sulfur cathode. Li-S battery with the functional inlayer shows an encouraging electrochemical performance. The initial discharge capacity is 719 mAh g(-1) and the capacity retains at 846 mAh g(-1) even after 200 cycles at 0.2C with an average coulombic efficiency of 94.2%. Moreover, the discharge capacities are 703 mAh g(-1) and 533 mAh g(-1) at 1C and 2C respectively even after 300 cycles. (C) 2014 Elsevier B.V. All rights reserved.
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