WO3 Nanowire/Carbon Nanotube Interlayer as a Chemical Adsorption Mediator for High-Performance Lithium-Sulfur Batteriesopen access
- Authors
- Lee, Sang-Kyu; Kim, Hun; Bang, Sangin; Myung, Seung-Taek; Sun, Yang-Kook
- Issue Date
- Jan-2021
- Publisher
- MDPI
- Keywords
- lithium-sulfur batteries; tungsten oxide nanowire; interlayer; thiosulfate mediator
- Citation
- MOLECULES, v.26, no.2, pp.1 - 13
- Indexed
- SCIE
SCOPUS
- Journal Title
- MOLECULES
- Volume
- 26
- Number
- 2
- Start Page
- 1
- End Page
- 13
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/8100
- DOI
- 10.3390/molecules26020377
- Abstract
- We developed a new nanowire for enhancing the performance of lithium-sulfur batteries. In this study, we synthesized WO3 nanowires (WNWs) via a simple hydrothermal method. WNWs and one-dimensional materials are easily mixed with carbon nanotubes (CNTs) to form interlayers. The WNW interacts with lithium polysulfides through a thiosulfate mediator, retaining the lithium polysulfide near the cathode to increase the reaction kinetics. The lithium-sulfur cell achieves a very high initial discharge capacity of 1558 and 656 mAh g(-1) at 0.1 and 3 C, respectively. Moreover, a cell with a high sulfur mass loading of 4.2 mg cm(-2) still delivers a high capacity of 1136 mAh g(-1) at a current density of 0.2 C and it showed a capacity of 939 mAh g(-1) even after 100 cycles. The WNW/CNT interlayer maintains structural stability even after electrochemical testing. This excellent performance and structural stability are due to the chemical adsorption and catalytic effects of the thiosulfate mediator on WNW.
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