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Effect of sulfur loading on energy density of lithium sulfur batteries
Author(s) -
Kang SungHwan,
Zhao Xiaohui,
Manuel James,
Ahn HyoJun,
Kim KiWon,
Cho KwonKoo,
Ahn JouHyeon
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201330569
Subject(s) - electrolyte , sulfur , cathode , battery (electricity) , chemistry , lithium (medication) , inorganic chemistry , scanning electron microscope , lithium–sulfur battery , polysulfide , chemical engineering , materials science , electrode , organic chemistry , composite material , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
During discharge of lithium sulfur (Li–S) battery with a liquid electrolyte system, sulfur is first reduced to Li 2 S 8 , 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 µl / mg_S. The surface morphology of fresh and cycled sulfur cathodes was characterized using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS).