Enhancement of surface stability of lithium manganese oxide spinel by silyl-group functionalized fluoride-responsive ionic liquid additives

Title
Enhancement of surface stability of lithium manganese oxide spinel by silyl-group functionalized fluoride-responsive ionic liquid additives
Authors
오시형나수빈이보은서효리Taeun Yim
Keywords
surface stability; cathode; lithium manganese oxides; silyl functional group; electrolyte additive
Issue Date
2018-08
Publisher
Journal of industrial and engineering chemistry
Citation
VOL 64-317
Abstract
Spinel-structured lithium manganese oxides are considered as promising cathode material, however, their widespread commercial application remains hampered by their poor surface instability. To overcome these problems, we designed and synthesized task-specific ionic liquid additives that can effectively scavenge trace amounts of fluoride in the cell. Addition of ionic liquid additives in the electrolyte significantly improves cycling retention. 1H- and 19F-nuclear magnetic resonance spectroscopy measurements and inductively coupled plasma mass spectrometry elemental analysis collaboratively provides clear evidence that the ionic liquid additives selectively suppress parasitic reactions of the electrolyte with the surface of lithium manganese oxides cathode.
URI
http://pubs.kist.re.kr/handle/201004/67711
ISSN
1226-086X
Appears in Collections:
KIST Publication > Article
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