Improvement of Li-Sulfur Cell Cycling Performance by Use of Fe1-xS@NC as a Functional Additive for Chemical Confinement of Lithium Polysulfides
- Title
- Improvement of Li-Sulfur Cell Cycling Performance by Use of Fe1-xS@NC as a Functional Additive for Chemical Confinement of Lithium Polysulfides
- Author
- 김동원
- Keywords
- REDUCED GRAPHENE OXIDE; CONDUCTING POLYMER; ANODE MATERIAL; S BATTERIES; CATHODE; ELECTROCHEMISTRY; STABILITY; CHEMISTRY
- Issue Date
- 2018-12
- Publisher
- ELECTROCHEMICAL SOC INC
- Citation
- JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v. 166, no. 3, page. A5201-A5209
- Abstract
- Lithium-sulfur cells using sulfur as an active cathode material offer high energy density and low-cost. However, dissolution and migration of lithium polysulfides (the 'shuttle effect') remain key obstacles for the practical development of lithium-sulfur cells. Here, we demonstrate that Fe1-xS (pyrrhotite) coated by N-doped carbon (Fe1-xS@NC) with high affinity for polysulfides and high electronic conductivity can be used as a functional additive to trap lithium polysulfides and reutilize reaction intermediates in the sulfur cathode during cycling. The addition of Fe1-xS@NC into the sulfur cathode results in the enhancement of cycling performance of the lithium-sulfur cell in terms of initial discharge capacity, capacity retention and rate capability. This superior cycling performance can be attributed to strong chemical interactions between electrically conductive Fe1-xS@NC particles and lithium polysulfides, which suppress the dissolution of lithium polysulfides and enhance the utilization of active sulfur during repeated cycling. (c) The Author(s) 2018. Published by ECS.
- URI
- http://jes.ecsdl.org/content/166/3/A5201https://repository.hanyang.ac.kr/handle/20.500.11754/121001
- ISSN
- 0013-4651; 1945-7111
- DOI
- 10.1149/2.0311903jes
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
- Files in This Item:
- Improvement of Li-Sulfur Cell Cycling Performance by Use of Fe1-xS@NC as a Functional Additive for Chemical Confinement of Lithium Polysulfides.pdfDownload
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