期刊
MOLECULES
卷 14, 期 5, 页码 1840-1851出版社
MDPI
DOI: 10.3390/molecules14051840
关键词
ionic liquid; ammonium; bis(trifluoromethanesulfonyl)imide (TFSI); allyl substituent; battery electrolyte
资金
- KOSEF
- BK 21
- Agency for Defense Development
- Samsung Electronics Manufacturing Technology Team
- National Research Foundation of Korea [과C6A1903, 2002-0037334] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Several new acyclic ammonium-TFSI ionic liquids with an allyl substituent(s) were synthesized and their physicochemical and electrochemical properties were characterized. [AAMM]Am-TFSI (3) with two allyl groups showed the widest electrochemical stability window (5.9 V) among the ammonium-based ILs reported to date because of the increment of both the anodic and cathodic limits. The charge-discharge performance of a LiCoO2-based half-cell containing [AAMM]Am-TFSI as an electrolyte was better in cycleability (the capacity retention ratio: 99% after 20 cycles) than that of the cell with the corresponding partially saturated analogue, [AMMP]Am-TFSI (2) (the capacity retention ratio: 92% after 20 cycles).
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