title: Highly Cyclable Lithium-Sulfur Batteries with a Dual-Type Sulfur Cathode and a Lithiated Si/SiOx Nanosphere Anode.
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.
authors.affiliation: †Department of Energy Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
authors.forename: Sang-Kyu
authors.initials: SK
authors.lastname: Lee
authors.affiliation: †Department of Energy Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
authors.forename: Seung-Min
authors.initials: SM
authors.lastname: Oh
authors.affiliation: †Department of Energy Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
authors.forename: Eunjun
authors.initials: E
authors.lastname: Park
authors.affiliation: §Italian Institute of Technology, Via Morego, 30 16163 Genova, Italy.
authors.forename: Bruno
authors.initials: B
authors.lastname: Scrosati
authors.affiliation: ¶Department of Chemistry, University of Rome Sapienza, Piazzale Aldo Moro, 5, 00185, Rome, Italy.
authors.forename: Jusef
authors.initials: J
authors.lastname: Hassoun
authors.affiliation: ‡Advanced Batteries Research Center, Korea Electronic Technology Institute, 68 Yatap-dong, Bundang-gu, Seongnam 463-816, South Korea.
authors.forename: Min-Sik
authors.initials: MS
authors.lastname: Park
authors.affiliation: ‡Advanced Batteries Research Center, Korea Electronic Technology Institute, 68 Yatap-dong, Bundang-gu, Seongnam 463-816, South Korea.
authors.forename: Young-Jun
authors.initials: YJ
authors.lastname: Kim
authors.affiliation: †Department of Energy Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
authors.forename: Hansu
authors.initials: H
authors.lastname: Kim
authors.affiliation: ∥Qatar Environment and Energy Research Institute, Qatar Foundation, P.O. Box 5825, Doha, Qatar.
authors.forename: Ilias
authors.initials: I
authors.lastname: Belharouak
authors.affiliation: †Department of Energy Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea.
authors.forename: Yang-Kook
authors.initials: YK
authors.lastname: Sun
keywords: Lithium−sulfur battery; full cell; hybrid cathode; polysulfide-catholyte; silicon-based anode