Lithium−sulfur batteries could become an excellent alternative to replace the currently used lithium-ion batteries due to their higher energy density and lower production cost; 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. 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 dual type sulfur cathode (solid sulfur electrode and polysulfide catholyte) and a lithiated Si/SiOx nanosphere anode. Our lithium−sulfur cell shows superior battery performance in terms of high specific capacity, excellent charge−discharge efficiency, and remarkable 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.

Highly cyclable lithium-sulfur batteries with a dual-type sulfur cathode and a lithiated Si/SiOx nanosphere anode

HASSOUN, Jusef;
2015

Abstract

Lithium−sulfur batteries could become an excellent alternative to replace the currently used lithium-ion batteries due to their higher energy density and lower production cost; 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. 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 dual type sulfur cathode (solid sulfur electrode and polysulfide catholyte) and a lithiated Si/SiOx nanosphere anode. Our lithium−sulfur cell shows superior battery performance in terms of high specific capacity, excellent charge−discharge efficiency, and remarkable 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.
2015
Lee, Sang Kyu; Oh, Seung Min; Park, Eunjun; Scrosati, Bruno; Hassoun, Jusef; Park, Min Sik; Kim, Young Jun; Kim, Hansu; Belharouak, Ilias; Sun, Yang Kook
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2334069
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