THESIS
2017
xii, 104 pages : illustrations (some color) ; 30 cm
Abstract
Non-aqueous Li-air battery have been considered as one of the next generation lithium-based
rechargeable battery. However, the instability issue of common organic electrolyte such as
Dimethyl sulfoxide (DMSO) and ethers slow down the development of Li-air batteries toward
the goals of commercialization. In this study, the use of common organic electrolyte was
avoided by employing molten nitrates (Li,K)NO
3 as the electrolyte. Due to the elevated battery
operating temperature (~150°C), an extremely low polarization (~30mV) was observed in the
charging plateau. However, the coulombic efficiency of the battery cycling was only ranging
from 60% to 80% caused by the significant amount of side reactions. This was attributed to the
presence of contaminants such as residual moisture and...[
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Non-aqueous Li-air battery have been considered as one of the next generation lithium-based
rechargeable battery. However, the instability issue of common organic electrolyte such as
Dimethyl sulfoxide (DMSO) and ethers slow down the development of Li-air batteries toward
the goals of commercialization. In this study, the use of common organic electrolyte was
avoided by employing molten nitrates (Li,K)NO
3 as the electrolyte. Due to the elevated battery
operating temperature (~150°C), an extremely low polarization (~30mV) was observed in the
charging plateau. However, the coulombic efficiency of the battery cycling was only ranging
from 60% to 80% caused by the significant amount of side reactions. This was attributed to the
presence of contaminants such as residual moisture and organic contaminations. Accumulation
of the side products would compromise the durability of battery and energy efficiency. Further
investigation on confirming the contamination effect should be conducted.
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