In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2015-02, No. 3 ( 2015-07-07), p. 327-327
Kurzfassung:
Lithium−sulfur batteries could become an excellent alternative to replace the currently used lithium-ion batteries. 1 The natural abundance and low cost of sulfur, coupled with the high theoretical energy density of sulfur-based cathodes, namely, 1675 mAh g -1 and 2600 Wh kg -1 , are the major advantages of this sulfur battery. 2 However, commercialization of lithium−sulfur batteries has so far been limited due to the cyclability problems associated with both the sulfur cathode and the lithium−metal anode. 3 Herein, we demonstrate a highly reliable lithium−sulfur battery showing cycle performance comparable to that of lithium-ion batteries; our design uses a highly reversible hybrid dual-type sulfur cathode (solid sulfur electrode and polysulfide catholyte) and a lithiated Si/SiO x nanosphere anode. Our result shows superior battery performance in terms of high specific capacity, excellent charge−discharge efficiency, and notable cycle life, delivering a specific capacity of ∼750 mAh g −1 over 500 cycles (85% of the initial capacity). These promising behaviors may arise from a synergistic effect of the enhanced electrochemical performance of the newly designed anode and the optimized layout of the cathode. References 1. B. Scrosati, J. Hassoun, Y-K. Sun, Energy Environ. Sci., 4, 3287 (2011). 2. E. Peled, A. Gorenshtein, M. Segal, Y. Sternberg, J. Power Sources, 26, 269 (1989). 3. Y-V. Mikhaylik, J. R. Akridge, J. Electrochem. Soc., 151, A1969 (2004).
Materialart:
Online-Ressource
ISSN:
2151-2043
DOI:
10.1149/MA2015-02/3/327
Sprache:
Unbekannt
Verlag:
The Electrochemical Society
Publikationsdatum:
2015
ZDB Id:
2438749-6
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