期刊
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
卷 211, 期 8, 页码 1895-1899出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201330569
关键词
energy density; lithium sulfur batteries; scanning electron microscopy
资金
- Mid-Career Researcher Program through NRF - Ministry of Science, ICT & Future Planning [2013R1A2A2A04016075]
- Ministry of Trade, Industry Energy (MOTIE)
- Korea Institute for Advancement of Technology (KIAT)
- Dongnam Institute for Regional Program Evaluation (IRPE) through the Leading Industry Development for Economic Region
- Korea Evaluation Institute of Industrial Technology (KEIT) [R0001125] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2013R1A2A2A04016075] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
During discharge of lithium sulfur (Li-S) battery with a liquid electrolyte system, sulfur is first reduced to Li2S8, which is dissolved into the organic electrolyte and this serves as the liquid cathode. In solution, lithium polysulfides undergo a series of chemical reactions and their concentration varies during cell reaction. The amount of sulfur and electrolytes in the system plays an important role in determining the cell performance. In this work, the effect of sulfur loading in cathode and the amount of electrolyte on the energy density and cycle performance of Li-S battery has been investigated. Cathodes with sulfur loading of 0.99, 2.98, and 6.80 mg_S cm(-2) were prepared. Precisely controlled amount of electrolyte was added with varied electrolyte/sulfur (E/S) ratios of 1.67, 5, 10, 20, and 40 mu l/mg_S. The surface morphology of fresh and cycled sulfur cathodes was characterized using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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