https://scholars.lib.ntu.edu.tw/handle/123456789/626297
標題: | Interconnected Microporous and Mesoporous Carbon Derived from Pitch for Lithium-Sulfur Batteries | 作者: | Ko Y.-C Hsu C.-H Lo C.-A Wu C.-M Yu H.-L Hsu C.-H Lin H.-P CHUNG-YUAN MOU Wu H.-L. |
關鍵字: | Lithium-sulfur battery; Mesoporous and microporous carbon; Operando Raman spectroscopy; Petroleum pitch; Sulfur redox kinetics | 公開日期: | 2022 | 卷: | 10 | 期: | 14 | 起(迄)頁: | 4462-4472 | 來源出版物: | ACS Sustainable Chemistry and Engineering | 摘要: | Lithium-sulfur (Li-S) batteries receive great attention due to their high theoretical energy density and low cost. However, the sulfur-carbon cathode suffers from the polysulfide dissolution during cycling, and the severe shuttle effect limits the practical application of Li-S batteries. In this work, a carbon material (XU76 carbon) derived from industry-residual petroleum was synthesized with a simple and low-cost method. Nitrogen adsorption, small-angle neutron scattering (SANS), adsorption kinetics, and UV-vis spectroscopy results show that the interconnected micromesopores in XU76 could act as a reservoir and trap polysulfide intermediates efficiently. The XU76 carbon with high surface area (∼1005 m2g-1), good electric conductivity, good ion transport, and optimized distribution of interconnected micromesopores is used as the sulfur host for trapping polysulfide intermediates and advancing sulfur redox kinetics. The Li-S battery with the sulfur-XU76 carbon cathode gives an initial discharge capacity of ∼1200 mAh g-1in the initial cycle and reversible capacity of ∼700 mAh g-1after 100 cycles at a C rate of 0.1 C while the Li-S battery with the sulfur-KB carbon cathode only delivers a discharge capacity of 400 mAh g-1after 100 cycles. Also, a discharge capacity of 462 mAh g-1is obtained after 200 cycles at a high C rate (1 C). The detailed reaction mechanism of sulfur-carbon cathodes is systematically studied at high C rates using operando Raman and S K-edge X-ray absorption spectroscopy. © 2022 American Chemical Society. All rights reserved. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127605656&doi=10.1021%2facssuschemeng.1c08196&partnerID=40&md5=a8475079cfe98c018c1b6b9768363981 https://scholars.lib.ntu.edu.tw/handle/123456789/626297 |
ISSN: | 21680485 | DOI: | 10.1021/acssuschemeng.1c08196 | SDG/關鍵字: | Cathodes; Costs; Gas adsorption; Kinetics; Lithium batteries; Lithium compounds; Microporosity; Neutron scattering; Polysulfides; Reaction rates; Sulfur; Ultraviolet visible spectroscopy; Carbon cathode; Lithium/sulfur batteries; Mesoporous carbon; Microporous carbons; Operando; Operando raman spectroscopy; Petroleum pitch; Polysulphides; Redox kinetics; Sulphur redox kinetic; Lithium sulfur batteries |
顯示於: | 化學系 |
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