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나노입자 연구단
나노입자 연구단
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Elemental Sulfur and Molybdenum Disulfide Composites for Li-S Batteries with Long Cycle Life and High-Rate Capability

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Title
Elemental Sulfur and Molybdenum Disulfide Composites for Li-S Batteries with Long Cycle Life and High-Rate Capability
Author(s)
Philip T. Dirlam; Jungjin Park; Adam G. Simmonds; Kenneth J Domanik; Clay B Arrington; Jennifer L. Schaefer; Vladimir P. Oleshko; Tristan S Kleine; Kookheon Char; Richard S. Glass; Christopher L. Soles; Chunjoong Kim; Nicola Pinna,; Yung-Eun Sung; Jeffrey Pyun
Publication Date
2016-06
Journal
ACS APPLIED MATERIALS & INTERFACES, v.8, no.21, pp.13437 - 13448
Publisher
AMER CHEMICAL SOC
Abstract
The practical implementation of Li−S technology has been hindered by short cycle life and poor rate capability owing to deleterious effects resulting from the varied solubilities of different Li polysulfide redox products. Here, we report the preparation and utilization of composites with a sulfur-rich matrix and molybdenum disulfide (MoS2) particulate inclusions as Li−S cathode materials with the capability to mitigate the dissolution of the Li polysulfide redox products via the MoS2 inclusions acting as “polysulfide anchors”. In situ composite formation was completed via a facile, one-pot method with commercially available starting materials. The composites were afforded by first dispersing MoS2 directly in liquid elemental sulfur (S8) with sequential polymerization of the sulfur phase via thermal ring opening polymerization or copolymerization via inverse vulcanization. For the practical utility of this system to be highlighted, it was demonstrated that the composite formation methodology was amenable to larger scale processes with composites easily prepared in 100 g batches. Cathodes fabricated with the high sulfur content composites as the active material afforded Li−S cells that exhibited extended cycle lifetimes of up to 1000 cycles with low capacity decay (0.07% per cycle) and demonstrated exceptional rate capability with the delivery of reversible capacity up to 500 mAh/g at 5 C. © 2016 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/3297
ISSN
1944-8244
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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