Facile and scalable fabrication of high-energy-density sulfur cathodes for pragmatic lithium-sulfur batteries
- Authors
- Kim, Min-Seop; Kim, Mun Sek; Do, Vandung; Xia, Yongyao; Kim, Woong; Cho, Won Il
- Issue Date
- 15-5월-2019
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Surface functionalization; Large-scale sulfur cathode; Polar binder; Lithium-sulfur batteries
- Citation
- JOURNAL OF POWER SOURCES, v.422, pp.104 - 112
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 422
- Start Page
- 104
- End Page
- 112
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/65413
- DOI
- 10.1016/j.jpowsour.2019.02.093
- ISSN
- 0378-7753
- Abstract
- Lithium-sulfur battery is garnering much of attention due to its high energy densities, low-cost active material of sulfur and variety of applications in portable electronics. High integrity and consistent qualities of the large-scale sulfur cathode with high energy have to be ensured to construct reliable and practical lithium-sulfur batteries that could supersede advancing lithium-ion batteries. Here, facile and productive approaches are developed to mass-produce functional sulfur hosts and to fabricate large-scale sulfur cathode with high sulfur loading. The functional sulfur host is synthesized by anchoring polyethylenimine at the surface of commercially available carbon at inert conditions with a scale of more than 10 g per batch via simple solution method. Combining the functionalized sulfur host with a polyacrylic acid binder allows high integrity and uniformity of the high sulfur loading cathode to be fabricated in large dimensions. Followed by this approach, the sulfur cathode, 70 x 6 cm(2), is produced with the sulfur loading of > 4.3 mg cm(-2). It is found that 12 wt% of polyethylenimine in the functionalized sulfur host with polyacrylic acid is at optimal condition that presents stable electrochemical performances over 600 cycles.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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