S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Robust cycling of Li-O 2 batteries through the synergistic effect of blended electrolytes
- Kim, Byung Gon; Lee, Je-Nam; Lee, Dong Jin; Park, Jung-Ki; Choi, Jang Wook
- Issue Date
- ChemSusChem, Vol.6 No.3, pp.443-448
- Despite their exceptionally large specific capacities, the use of LiO2 batteries has been limited because of their poor cycle lives, which originates from irreversible reaction processes during each cycle. Recent investigations have found that electrolyte decomposition is one of the most critical reasons for capacity decay. Herein, we report that a blended electrolyte, consisting of a carbonate solvent and an ionic liquid, improves the cycle lives of LiO2 batteries remarkably through a synergistic effect from both components. Both electrolyte components perform complementary functions to each other: The ionic liquid suppresses the decomposition of the carbonate solvent, and the carbonate solvent resolves the poor ionic conductivity of the ionic liquid. This study confirms the importance and opportunities for the use of electrolytes in LiO2 batteries.
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