Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 742, Issue -, Pages 868-876Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.01.364
Keywords
Conducting polymer; Polymer-coated sulfur; Sulfur cathode material; Lithium sulfur battery
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Funding
- National Research Council of Science Technology [CAP-14-2-KITECH]
- KIST institutional program [2V05940, 2E28142]
- Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) - Ministry of Science ICT [2017M1A2A2044477]
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This study is aimed at alleviating the inherent disadvantages of sulfur cathodes in lithium-sulfur (Li-S) batteries by encapsulating the sulfur particles with a dual (ionic and electronic)-conducting polymer via a simple, single-step procedure. Successful encapsulation by the polymer was confirmed by microscopic analyses. The encapsulated sulfur electrodes exhibit stable cycling performance and high sulfur utilization; in particular, the cell with 1 wt% dual conducting polymer-coated sulfur particles exhibit the best cycle performance with a discharge capacity of 1002 mAh g(-1) after 100 cycles at 0.2 C-rate. As opposed to various sulfur-carbon composites reported previously, our 1 wt% dual conducting polymer-coated sulfur composite achieves a very high loading level of 99%. This simple strategy of encapsulating sulfur particles with functional polymers could be a potential pathway toward the commercialization of Li-S batteries. (c) 2018 Elsevier B.V. All rights reserved.
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