Effects of imidazolium salts on discharge performance of rechargeable lithium–sulfur cells containing organic solvent electrolytes
2005; Elsevier BV; Volume: 152; Linguagem: Inglês
10.1016/j.jpowsour.2005.03.003
ISSN1873-2755
AutoresSeok Kim, Yongju Jung, Soo‐Jin Park,
Tópico(s)Advancements in Battery Materials
ResumoIn this study, lithium–sulfur (Li–S) cells using mixed imidazolium salts and lithium salts for the electrolytes are investigated as a means to improve discharge performance and cycle-life characteristics. By introducing 5 or 10 vol.% of imidazolium salt into the electrolytes containing lithium salts, the Li–S cells give a greatly enhanced discharge capacity of >600 mAh g−1 up to the 100th charge–discharge cycle. Furthermore, both the discharge capacity and the average discharge voltage at a high discharge rate, as well as the low-temperature performance, are all dramatically improved when compared with those of conventional cells using organic electrolyte solvents and lithium salts.
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