Lithium Ion Intercalation into Graphite in so 2 -Based Inorganic Electrolyte Towards High-Rate Capable and Safe Lithium Ion Batteries

• Published in: Meeting abstracts (Electrochemical Society) Vol. MA2019-01; no. 2; p. 206
• Main Authors: Lee, Jiwhan, Kim, Ayoung, Jung, Hojae, Jeong, Goojin, Kim, Hansu
• Format: Journal Article
• Language: English
• Published: 01.05.2019
• ISSN: 2151-2043; 2151-2035
• DOI: 10.1149/MA2019-01/2/206

Lithium ion batteries (LIBs) have been used widely as power sources for portable electronic devices and regarded as promising power sources for next-generation secondary battery system. To meet the demands of these emerging applications, the safety, power density and energy density of Li batteries need to be further improved. In this presentation, we report the reversible lithium ion intercalation reaction into graphite anode in LiAlCl 4 -3SO 2 non-flammable inorganic liquid electrolyte. Using ex situ x-ray diffraction analysis as well as electrochemical characterization techniques, we found that lithium ions could be reversibly intercalated into graphite anode materials with highly stable capacity retention up to 100 cycles. X-ray photoelectron spectroscopy on the reacted graphite electrode clearly showed that solid electrolyte interface(SEI) formed on the graphite was completely different from SEI formed on the graphite in the conventionally used organic electrolyte. Detailed electrochemical properties of graphite in SO 2 -based inorganic electrolyte will be discussed in this presentation.