GBL-based electrolyte for Li-ion battery: thermal and electrochemical performance |
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Authors: | Dmitry Belov Deng-Tswen Shieh |
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Institution: | (1) Industrial Technology Research Institute (ITRI), Bldg. 77, 195, Sec. 4, Chung Hsing Rd., Hsinchu, 31040, Taiwan |
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Abstract: | Thermal stability, flammability, and electrochemical performances of the cyclic carbonate-based electrolytes where γ-butyrolactone
(GBL) is a main component (at least 50 vol.%) among of EC and PC with LiBF4] have been examined in comparison with contemporary (EC/EMC, 1:3 vol.%, 1 M LiPF6) electrolyte by DSC, accelerating rate calorimetry (ARC), AC impedance, and cyclic voltammetry (CV). This study shows that
GBL-based electrolytes have perfect thermal stability and will improve Li-ion battery safety (including flammability) without
performance trade-off with the accurate combination of active materials and separator. Several types of negative electrode
materials (such as hard carbon, MCMB, and SWF) have been tested to evaluate GBL-based electrolyte influence on SEI formation
and battery performance. Finally, GBL-based electrolytes show not only equal electrochemical performance in comparison to
commonly used electrolytes (EC/EMC in this study) but it will notably improve battery safety. |
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Keywords: | |
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